Re: [MBZ] Bearing kit and special tool? Now chaning a cv, shaft too...

2011-08-02 Thread Rolf
I think the issue is the 9psi. I am not sure what the power difference 
is but it is noticeable in the seat of the pants.


-Rolf



On 08/01/2011 02:26 PM, Mitch Haley wrote:

Rolf wrote:
I realize my 300d is different than others but any 300d in good tune 
should be able to cruise up and down hills on the interstate without 
a problem. These cars were road tested in Germany which has plenty of 
hills. Are you sure your car is in good tune? What is the 0-60?



A 1979 300SD, with oversized (215/75R14) tires, the pre-1980 engine 
with less power, and 3.07 diff, can accelerate (slowly) in 4th gear at 
65mph up a 8% grade. Seems unlikely a W123 should have trouble with 
the later big cam engine, even with a 2.88.


Mitch.

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Re: [MBZ] Bearing kit and special tool? Now chaning a cv, shaft too...

2011-08-02 Thread Michael Canfield
With the stock size tires it holds speed on the highway just fine.  With the
207/75's I need to step down on it hard to get it to hold speed.  Not that
it won't do it, I just have to step on it harder to get the same result.
  I make my own fuel so I am pretty aware of how much I burn for a given
trip, I make the same trips over and over, and I am burning more fuel with
the taller tires, even on the highway.

Mike
On Aug 2, 2011 11:39 AM, Rolf r...@winmutt.com wrote:
 I think the issue is the 9psi. I am not sure what the power difference
 is but it is noticeable in the seat of the pants.

 -Rolf



 On 08/01/2011 02:26 PM, Mitch Haley wrote:
 Rolf wrote:
 I realize my 300d is different than others but any 300d in good tune
 should be able to cruise up and down hills on the interstate without
 a problem. These cars were road tested in Germany which has plenty of
 hills. Are you sure your car is in good tune? What is the 0-60?


 A 1979 300SD, with oversized (215/75R14) tires, the pre-1980 engine
 with less power, and 3.07 diff, can accelerate (slowly) in 4th gear at
 65mph up a 8% grade. Seems unlikely a W123 should have trouble with
 the later big cam engine, even with a 2.88.

 Mitch.

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Re: [MBZ] Bearing kit and special tool? Now chaning a cv, shaft too...

2011-08-01 Thread Rolf
I realize my 300d is different than others but any 300d in good tune 
should be able to cruise up and down hills on the interstate without a 
problem. These cars were road tested in Germany which has plenty of 
hills. Are you sure your car is in good tune? What is the 0-60?


-Rolf


On 07/31/2011 10:21 AM, Michael Canfield wrote:

Interesting.  And yes, the original idea was to lower rpm's at cruising
speed in order to gain economy.  With my F350 with na 7.3 I went from a 32
inch tire to a 35 inch tire and that got my rpm's down to about 1800 at
55mph and my mileage went up at least 3mpg overall.  I don't keep a log and
the odometer doesn't work on any of my trucks so I am figuring based on gps
speedometer and nav system miles.  Only rpughly accurate as I can not fill
my tank or it will leak out the top

So back to the Benz.  I was just thinking the same principle might apply to
that for gaining mpg.  I put taller tires on the back to simulate the 85
gearing before I changed it out and I don't like it.  There are too many
hills around here.  I have to have it wound up to 80 to maintain speed on
hills on rte 81.  It will run 100mph with ease with the change in gearing
but I don't need that, I need hill pulling power.

Mike

Mike
On Jul 31, 2011 10:05 AM, Rolfr...@winmutt.com  wrote:

The KKK has an external adjustment that is easy to get to. The Garret it
a bit of a PITA but doable as well, no need to remove the turbos.

-Rolf

On 7/30/2011 6:35 PM, MG wrote:

So really it isn't worth taking the turbo out to set the waste gate to
a higher pressure since most of the driving I do I don't even get near
the 9 but once a month if that.

Less work is better,
Manfred




Message: 6
Date: Fri, 29 Jul 2011 19:51:19 -0500
From: Peter Frederickpsf...@earthlink.net
To: Mercedes Discussion Listmercedes@okiebenz.com
Subject: Re: [MBZ] Bearing kit and special tool? Now chaning a cv,
shaft too...


11 psi is the max for a 617, but 14 psi is normal for a 603. You
will get a bit more power at 11 than at 9 on a 617, but you will get
greatly accelerated engine wear above 11.

Note that the intake pressure and fuel delivery are related but not
by a fixed amount. The governor will reduce the fuel even at high
pressure if the engine speed is correct, although if you are not at
high load, this will also reduce the pressure, but not in a linear way.

Peter

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Re: [MBZ] Bearing kit and special tool? Now chaning a cv, shaft too...

2011-08-01 Thread Mitch Haley

Rolf wrote:
I realize my 300d is different than others but any 300d in good tune 
should be able to cruise up and down hills on the interstate without a 
problem. These cars were road tested in Germany which has plenty of 
hills. Are you sure your car is in good tune? What is the 0-60?



A 1979 300SD, with oversized (215/75R14) tires, the pre-1980 engine with less 
power, and 3.07 diff, can accelerate (slowly) in 4th gear at 65mph up a 8% 
grade. Seems unlikely a W123 should have trouble with the later big cam engine, 
even with a 2.88.


Mitch.

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Re: [MBZ] Bearing kit and special tool? Now chaning a cv, shaft too...

2011-08-01 Thread Rolf

Interestingly enough :

http://www.fueleconomy.gov/feg/compx2008f.jsp?year=1985make=Mercedes-Benzmodel=300D/300CDhiddenField=Findacar

vs

http://www.fueleconomy.gov/feg/compx2008f.jsp?year=1984make=Mercedes-Benzmodel=300D/300CDhiddenField=Findacar

I wonder if that has to do with the oxy trap etc?

On 07/31/2011 05:11 PM, Curt Raymond wrote:

Don't take this the wrong way but in every case when I've seen anyone estimate 
fuel mileage (even me) it'll tend to be off, and usually off badly.
Without a properly corrected odometer and a fuel tank you can accurately fill 
to the same point every time your mileage numbers are hopeless. Your 3mpg 
improvement could just as easily be a 3mpg loss. It doesn't take much 
inaccuracy to change something like that.

I've still never seen anybody make any kind of gearing change on a diesel to 
increase mileage with an accompanying odometer correction post real mileage 
figures so I still doubt that it makes a difference worth having.

One last point, 1 ton trucks like your F350 are usually geared for towing so an 
overall gearing change (like bigger tires) are quite likely to make a positive 
impact on mileage with a gas or NA diesel. I think with a turbo diesel getting 
the highway RPM too low will negatively impact mileage or at least not help.

-Curt

Date: Sun, 31 Jul 2011 10:21:15 -0400
From: Michael Canfieldslozuk...@gmail.com
To: Mercedes Discussion Listmercedes@okiebenz.com
Subject: Re: [MBZ] Bearing kit and special tool? Now chaning a cv,
 shaft too...
Message-ID:
 calhj_1bejfbe3hon-ups3r1b1k-uhsp0okgsyhqxxft_ycf...@mail.gmail.com
Content-Type: text/plain; charset=ISO-8859-1

Interesting.  And yes, the original idea was to lower rpm's at cruising
speed in order to gain economy.  With my F350 with na 7.3 I went from a 32
inch tire to a 35 inch tire and that got my rpm's down to about 1800 at
55mph and my mileage went up at least 3mpg overall.  I don't keep a log and
the odometer doesn't work on any of my trucks so I am figuring based on gps
speedometer and nav system miles.  Only rpughly accurate as I can not fill
my tank or it will leak out the top

So back to the Benz.  I was just thinking the same principle might apply to
that for gaining mpg.  I put taller tires on the back to simulate the 85
gearing before I changed it out and I don't like it.  There are too many
hills around here.  I have to have it wound up to 80 to maintain speed on
hills on rte 81.  It will run 100mph with ease with the change in gearing
but I don't need that, I need hill pulling power.

Mike

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Re: [MBZ] Bearing kit and special tool? Now chaning a cv shaft too...

2011-07-31 Thread Rolf
Yes but output efficiency does not equal fuel efficiency. This was about 
fuel efficiency unless I misread something.


-Rolf

On 7/29/2011 4:14 PM, Fmiser wrote:

Rolf wrote:
Remember the more boost the more fuel is being burnt. Ideally
you want 1500 rpm at speed. I am at 1500rpm at 55mph in my 87
300d with the 5 speed.

Efficiency increases with boost.  So fuel used to cover a
distance can actually _decrease_.  The efficiency curve
turbo-supercharger equipped engine is not a simple curve.  :)

-- Philip

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Re: [MBZ] Bearing kit and special tool? Now chaning a cv, shaft too...

2011-07-31 Thread Rolf
The KKK has an external adjustment that is easy to get to. The Garret it 
a bit of a PITA but doable as well, no need to remove the turbos.


-Rolf

On 7/30/2011 6:35 PM, MG wrote:
So really it isn't worth taking the turbo out to set the waste gate to 
a higher pressure since most of the driving I do I don't even get near 
the 9 but once a month if that.


Less work is better,
Manfred




Message: 6
Date: Fri, 29 Jul 2011 19:51:19 -0500
From: Peter Frederick psf...@earthlink.net
To: Mercedes Discussion List mercedes@okiebenz.com
Subject: Re: [MBZ] Bearing kit and special tool? Now chaning a cv,
shaft too...


11 psi is the max for a 617, but 14 psi is normal for a 603.  You
will get a bit more power at 11 than at 9 on a 617, but you will get
greatly accelerated engine wear above 11.

Note that the intake pressure and fuel delivery are related but not
by a fixed amount.  The governor will reduce the fuel even at high
pressure if the engine speed is correct, although if you are not at
high load, this will also reduce the pressure, but not in a linear way.

Peter

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Re: [MBZ] Bearing kit and special tool? Now chaning a cv, shaft too...

2011-07-31 Thread Michael Canfield
Interesting.  And yes, the original idea was to lower rpm's at cruising
speed in order to gain economy.  With my F350 with na 7.3 I went from a 32
inch tire to a 35 inch tire and that got my rpm's down to about 1800 at
55mph and my mileage went up at least 3mpg overall.  I don't keep a log and
the odometer doesn't work on any of my trucks so I am figuring based on gps
speedometer and nav system miles.  Only rpughly accurate as I can not fill
my tank or it will leak out the top

So back to the Benz.  I was just thinking the same principle might apply to
that for gaining mpg.  I put taller tires on the back to simulate the 85
gearing before I changed it out and I don't like it.  There are too many
hills around here.  I have to have it wound up to 80 to maintain speed on
hills on rte 81.  It will run 100mph with ease with the change in gearing
but I don't need that, I need hill pulling power.

Mike

Mike
On Jul 31, 2011 10:05 AM, Rolf r...@winmutt.com wrote:
 The KKK has an external adjustment that is easy to get to. The Garret it
 a bit of a PITA but doable as well, no need to remove the turbos.

 -Rolf

 On 7/30/2011 6:35 PM, MG wrote:
 So really it isn't worth taking the turbo out to set the waste gate to
 a higher pressure since most of the driving I do I don't even get near
 the 9 but once a month if that.

 Less work is better,
 Manfred




 Message: 6
 Date: Fri, 29 Jul 2011 19:51:19 -0500
 From: Peter Frederick psf...@earthlink.net
 To: Mercedes Discussion List mercedes@okiebenz.com
 Subject: Re: [MBZ] Bearing kit and special tool? Now chaning a cv,
 shaft too...


 11 psi is the max for a 617, but 14 psi is normal for a 603. You
 will get a bit more power at 11 than at 9 on a 617, but you will get
 greatly accelerated engine wear above 11.

 Note that the intake pressure and fuel delivery are related but not
 by a fixed amount. The governor will reduce the fuel even at high
 pressure if the engine speed is correct, although if you are not at
 high load, this will also reduce the pressure, but not in a linear way.

 Peter

 ___
 http://www.okiebenz.com
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 http://mail.okiebenz.com/mailman/listinfo/mercedes_okiebenz.com


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Re: [MBZ] Bearing kit and special tool? Now chaning a cv shaft too...

2011-07-31 Thread Curt Raymond
Thats the part I don't understand, how can you make the output efficiency 
higher without increasing fuel efficiency at any given load? If the engine is 
more efficient at producing a given level of work it must use less fuel 
otherwise what is the efficiency good for?

The turbo kicks in, the engine produces more power, your foot backs off the 
throttle because you don't need/want to go faster, the amount of fuel used is 
less...

-Curt

Date: Sun, 31 Jul 2011 10:02:48 -0400
From: Rolf r...@winmutt.com
To: mercedes@okiebenz.com
Subject: Re: [MBZ] Bearing kit and special tool? Now chaning a cv
shafttoo...
Message-ID: 4e356088.5080...@winmutt.com
Content-Type: text/plain; charset=ISO-8859-1; format=flowed

Yes but output efficiency does not equal fuel efficiency. This was about
fuel efficiency unless I misread something.

-Rolf

On 7/29/2011 4:14 PM, Fmiser wrote:
 Rolf wrote:
 Remember the more boost the more fuel is being burnt. Ideally
 you want 1500 rpm at speed. I am at 1500rpm at 55mph in my 87
 300d with the 5 speed.
 Efficiency increases with boost.  So fuel used to cover a
 distance can actually _decrease_.  The efficiency curve
 turbo-supercharger equipped engine is not a simple curve.  :)

 -- Philip

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Re: [MBZ] Bearing kit and special tool? Now chaning a cv, shaft too...

2011-07-31 Thread Curt Raymond
Don't take this the wrong way but in every case when I've seen anyone estimate 
fuel mileage (even me) it'll tend to be off, and usually off badly.
Without a properly corrected odometer and a fuel tank you can accurately fill 
to the same point every time your mileage numbers are hopeless. Your 3mpg 
improvement could just as easily be a 3mpg loss. It doesn't take much 
inaccuracy to change something like that.

I've still never seen anybody make any kind of gearing change on a diesel to 
increase mileage with an accompanying odometer correction post real mileage 
figures so I still doubt that it makes a difference worth having.

One last point, 1 ton trucks like your F350 are usually geared for towing so an 
overall gearing change (like bigger tires) are quite likely to make a positive 
impact on mileage with a gas or NA diesel. I think with a turbo diesel getting 
the highway RPM too low will negatively impact mileage or at least not help.

-Curt

Date: Sun, 31 Jul 2011 10:21:15 -0400
From: Michael Canfield slozuk...@gmail.com
To: Mercedes Discussion List mercedes@okiebenz.com
Subject: Re: [MBZ] Bearing kit and special tool? Now chaning a cv,
shaft too...
Message-ID:
calhj_1bejfbe3hon-ups3r1b1k-uhsp0okgsyhqxxft_ycf...@mail.gmail.com
Content-Type: text/plain; charset=ISO-8859-1

Interesting.  And yes, the original idea was to lower rpm's at cruising
speed in order to gain economy.  With my F350 with na 7.3 I went from a 32
inch tire to a 35 inch tire and that got my rpm's down to about 1800 at
55mph and my mileage went up at least 3mpg overall.  I don't keep a log and
the odometer doesn't work on any of my trucks so I am figuring based on gps
speedometer and nav system miles.  Only rpughly accurate as I can not fill
my tank or it will leak out the top

So back to the Benz.  I was just thinking the same principle might apply to
that for gaining mpg.  I put taller tires on the back to simulate the 85
gearing before I changed it out and I don't like it.  There are too many
hills around here.  I have to have it wound up to 80 to maintain speed on
hills on rte 81.  It will run 100mph with ease with the change in gearing
but I don't need that, I need hill pulling power.

Mike

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Re: [MBZ] Bearing kit and special tool? Now chaning a cv shaft too...

2011-07-31 Thread Craig
On Sun, 31 Jul 2011 14:05:13 -0700 (PDT) Curt Raymond
curtlud...@yahoo.com wrote:

 Thats the part I don't understand, how can you make the output
 efficiency higher without increasing fuel efficiency at any given load?
 If the engine is more efficient at producing a given level of work it
 must use less fuel otherwise what is the efficiency good for?
 
 The turbo kicks in, the engine produces more power, your foot backs off
 the throttle because you don't need/want to go faster, the amount of
 fuel used is less...


I think we are now into semantics.


Craig


 Yes but output efficiency does not equal fuel efficiency. This was about
 fuel efficiency unless I misread something.

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Re: [MBZ] Bearing kit and special tool? Now chaning a cv, , shaft too...

2011-07-31 Thread MG
Yeah so I've heard. I have the Garret and if I do it it will be 
when it's out and replace the bearings and seals at the same time.


Manfred



Date: Sun, 31 Jul 2011 10:04:24 -0400
From: Rolf r...@winmutt.com
To: mercedes@okiebenz.com
Subject: Re: [MBZ] Bearing kit and special tool? Now chaning a cv,
shaft too...
Message-ID: 4e3560e8.5040...@winmutt.com
Content-Type: text/plain; charset=ISO-8859-1; format=flowed

The KKK has an external adjustment that is easy to get to. The 
Garret it

a bit of a PITA but doable as well, no need to remove the turbos.

-Rolf

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Re: [MBZ] Bearing kit and special tool? Now chaning a cv, shaft too...

2011-07-30 Thread MG
So really it isn't worth taking the turbo out to set the waste 
gate to a higher pressure since most of the driving I do I don't 
even get near the 9 but once a month if that.


Less work is better,
Manfred




Message: 6
Date: Fri, 29 Jul 2011 19:51:19 -0500
From: Peter Frederick psf...@earthlink.net
To: Mercedes Discussion List mercedes@okiebenz.com
Subject: Re: [MBZ] Bearing kit and special tool? Now chaning a cv,
shaft too...


11 psi is the max for a 617, but 14 psi is normal for a 603.  You
will get a bit more power at 11 than at 9 on a 617, but you will get
greatly accelerated engine wear above 11.

Note that the intake pressure and fuel delivery are related but not
by a fixed amount.  The governor will reduce the fuel even at high
pressure if the engine speed is correct, although if you are not at
high load, this will also reduce the pressure, but not in a 
linear way.


Peter

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Re: [MBZ] Bearing kit and special tool? Now chaning a cv, shaft too...

2011-07-29 Thread MG

Philip,

If it helps on two different 300D's both 83's, I have measured 
from 5 to 6 lbs boost at 55-60mph. So if yours is doing that then 
I would think it is pretty much normal. The max boost I have 
measured on both is right at 9lbs so the 5-6lbs is not due to the 
bypass valve opening. BTW on one of these the turbo is rebuilt so 
everything should be in good condition and therefor normal as 
from the factory. I can't see any way to increase the boost at 
highway speeds other then to use a different turbo (smaller or 
larger?) that would turn at higher RPM to increase boost.


Manfred



Date: Thu, 28 Jul 2011 16:37:56 -0500
From: Fmiser fmi...@gmail.com
To: Mercedes Discussion List mercedes@okiebenz.com
Subject: Re: [MBZ] Bearing kit and special tool? Now chaning a cv
shaft too...


I don't like the long-legged gearing on my 85.  The engine is
running too slow at low highway speeds. (Best I can remember.
The tach is still dead)  The turbo isn't really working much
at 55-60 mph.

--Philip


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Re: [MBZ] Bearing kit and special tool? Now chaning a cv, shaft too...

2011-07-29 Thread Rolf
Proper boost is 11psi. Youd be surprised how much of a diff 2-3 psi 
makes. You might be able to increase cruising boost by using a manual 
boost controller. The waste gate will start opening as it approaches max 
psi, making for more of a curve, with the mbc you get a straight ride up 
and then a direct fall off.


-Rolf


On 07/29/2011 10:43 AM, MG wrote:

Philip,

If it helps on two different 300D's both 83's, I have measured from 5 
to 6 lbs boost at 55-60mph. So if yours is doing that then I would 
think it is pretty much normal. The max boost I have measured on both 
is right at 9lbs so the 5-6lbs is not due to the bypass valve opening. 
BTW on one of these the turbo is rebuilt so everything should be in 
good condition and therefor normal as from the factory. I can't see 
any way to increase the boost at highway speeds other then to use a 
different turbo (smaller or larger?) that would turn at higher RPM to 
increase boost.


Manfred



Date: Thu, 28 Jul 2011 16:37:56 -0500
From: Fmiser fmi...@gmail.com
To: Mercedes Discussion List mercedes@okiebenz.com
Subject: Re: [MBZ] Bearing kit and special tool? Now chaning a cv
shaft too...


I don't like the long-legged gearing on my 85.  The engine is
running too slow at low highway speeds. (Best I can remember.
The tach is still dead)  The turbo isn't really working much
at 55-60 mph.

--Philip


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Re: [MBZ] Bearing kit and special tool? Now chaning a cv shaft too...

2011-07-29 Thread Rolf
Thats because the optimal cruising speed for a 85 300d with 2.88 gearing 
is 74.5mph.


-Rolf



I don't like the long-legged gearing on my 85.  The engine is
running too slow at low highway speeds. (Best I can remember.
The tach is still dead)  The turbo isn't really working much
at 55-60 mph.

--Philip

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Re: [MBZ] Bearing kit and special tool? Now chaning a cv shaft too...

2011-07-29 Thread Rolf


Remember the more boost the more fuel is being burnt. Ideally you want 
1500 rpm at speed. I am at 1500rpm at 55mph in my 87 300d with the 5 speed.


-Rolf

On 07/28/2011 07:08 PM, Michael Canfield wrote:

I was thinking the 85 gears would get me better fuel economy at highway
speeds.  Maybe at the cost of worse mileage overall if the turbo isn't
spooled up enough at average travel speeds.





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Re: [MBZ] Bearing kit and special tool? Now chaning a cv shaft too...

2011-07-29 Thread Michael Canfield
What is the optimal cruising speed for the 83 300d?

Mike
On Jul 29, 2011 1:53 PM, Rolf r...@winmutt.com wrote:
 Thats because the optimal cruising speed for a 85 300d with 2.88 gearing
 is 74.5mph.

 -Rolf


 I don't like the long-legged gearing on my 85. The engine is
 running too slow at low highway speeds. (Best I can remember.
 The tach is still dead) The turbo isn't really working much
 at 55-60 mph.

 -- Philip

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Re: [MBZ] Bearing kit and special tool? Now chaning a cv shaft too...

2011-07-29 Thread Rolf
68mph I would guess. 2.88/3.07*120kph. The was in a thread I read quoted 
from MB, I think this is not over all MPG but bang for buck assuming 
time and diesel costs money.


-Rolf

On 07/29/2011 02:01 PM, Michael Canfield wrote:

What is the optimal cruising speed for the 83 300d?

Mike
On Jul 29, 2011 1:53 PM, Rolfr...@winmutt.com  wrote:

Thats because the optimal cruising speed for a 85 300d with 2.88 gearing
is 74.5mph.

-Rolf



I don't like the long-legged gearing on my 85. The engine is
running too slow at low highway speeds. (Best I can remember.
The tach is still dead) The turbo isn't really working much
at 55-60 mph.

-- Philip

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Re: [MBZ] Bearing kit and special tool? Now chaning a cv shaft too...

2011-07-29 Thread Fmiser
  Fmiser wrote:
 
  I don't like the long-legged gearing on my 85.  The engine is
  running too slow at low highway speeds. (Best I can remember.
  The tach is still dead)  The turbo isn't really working
  much at 55-60 mph.

 Rolf wrote:

 Thats because the optimal cruising speed for a 85 300d with
 2.88 gearing is 74.5mph.

What size tire?

And I'm mighty curious how you arrived at that particular speed
as the optimal.

But kinda my point.  And Mike was contemplating putting the tall
gears in to improve fuel efficiency.  And I was warning that it
might not really help.

-- Philip

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Re: [MBZ] Bearing kit and special tool? Now chaning a cv shaft too...

2011-07-29 Thread Fmiser
 Rolf wrote:

 
 Remember the more boost the more fuel is being burnt. Ideally
 you want 1500 rpm at speed. I am at 1500rpm at 55mph in my 87
 300d with the 5 speed.

Efficiency increases with boost.  So fuel used to cover a
distance can actually _decrease_.  The efficiency curve
turbo-supercharger equipped engine is not a simple curve.  :)

-- Philip

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Re: [MBZ] Bearing kit and special tool? Now chaning a cv shaft too...

2011-07-29 Thread Rolf
Boost starts building at ~1800rpm, 1500rpm is where I am out of stall, 
ymmv on an automatic. More boost does mean you are burning more fuel 
automatically because of the ALDA on those cars equipped with them, the 
electronic IPs are a different beast altogether. Engine efficiency does 
not equal MPG as does optimal not equal minimal. I am pretty sure fuel 
is not increased on load as the bench tests dont involve load. Again on 
the mechanical IPs. If fuel did increase on load you would not have to 
move the pedal when you go up a hill.


I could be totally wrong on this part, the OP mentioned that a heavy 
load ruined his axles, this is actually possible IMO, as it happened 
with me (atleast this is my theory). As your rear sags (in my case I 
lowered the car) the angle that the joints work at changes. Youve spent 
a hundred thousand miles at essentially one angle. Then bam, you've 
changed the angle, increased the load on the joint and the balls start 
tearing into new metal. Then the trip is over and suddenly you are back 
to the 100k wear mark but suddenly you have alot more area to move in.


-Rolf

On 07/29/2011 03:33 PM, Curt Raymond wrote:

Why 1500rpm? The turbo isn't kicking in at 1500 rpm... More boost doesn't equal 
more fuel being burnt automatically, the load on the engine plays into that. I 
don't know HOW but it does. The turbo makes the engine more efficient not less, 
if you're not into the turbo you're not making optimal efficiency which is 
where optimal fuel economy will come in.

An OM601 IIRC has its peak torque somewhere around 2500rpm so with my '85 190D 
I used to endevor to keep it there. With the 5spd that was somewhere around 
62mph in 5th. In later testing I realized it didn't make a whole lot of 
difference to my fuel economy what the speed of the engine was, it was more on 
the speed of the CAR. The sweet spot still seemed to be around 62mph, slower 
than that and I went stir crazy, faster and the fuel gauge dropped faster than  
I like.

-Curt

Date: Fri, 29 Jul 2011 13:56:07 -0400
From: Rolfr...@winmutt.com
To: mercedes@okiebenz.com
Subject: Re: [MBZ] Bearing kit and special tool? Now chaning a cv
 shafttoo...
Message-ID:4e32f437.7080...@winmutt.com
Content-Type: text/plain; charset=ISO-8859-1; format=flowed


Remember the more boost the more fuel is being burnt. Ideally you want
1500 rpm at speed. I am at 1500rpm at 55mph in my 87 300d with the 5 speed.

-Rolf

On 07/28/2011 07:08 PM, Michael Canfield wrote:

I was thinking the 85 gears would get me better fuel economy at highway
speeds.  Maybe at the cost of worse mileage overall if the turbo isn't
spooled up enough at average travel speeds.

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Re: [MBZ] Bearing kit and special tool? Now chaning a cv shaft too...

2011-07-29 Thread Rolf
This was in MB literature somewhere, referencing 75mph. I was being a 
bit more precise (anal? facetious? trolling?) as it would make sense 
that the car would be setup for 120kph. This would be with stock tires 
of course.


-Rolf

On 07/29/2011 04:09 PM, Fmiser wrote:

Fmiser wrote:

I don't like the long-legged gearing on my 85.  The engine is
running too slow at low highway speeds. (Best I can remember.
The tach is still dead)  The turbo isn't really working
much at 55-60 mph.

Rolf wrote:

Thats because the optimal cruising speed for a 85 300d with
2.88 gearing is 74.5mph.

What size tire?

And I'm mighty curious how you arrived at that particular speed
as the optimal.

But kinda my point.  And Mike was contemplating putting the tall
gears in to improve fuel efficiency.  And I was warning that it
might not really help.

-- Philip

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Re: [MBZ] Bearing kit and special tool? Now chaning a cv shaft too...

2011-07-29 Thread Curt Raymond
Have you done any actual testing to prove this theory? Its just that your 
suggestions go against everything I've ever read about diesel theory and my own 
results. Unfortunately I don't have any results involving a turbo so my ideas 
are totally based on NA engines but I do have a good feel (150,000+ documented 
miles) for how the NA engines perform in 190Ds and 240Ds.

-Curt

Date: Fri, 29 Jul 2011 16:26:44 -0400
From: Rolf r...@winmutt.com
To: mercedes@okiebenz.com
Subject: Re: [MBZ] Bearing kit and special tool? Now chaning a cv
shafttoo...
Message-ID: 4e331784.4070...@winmutt.com
Content-Type: text/plain; charset=ISO-8859-1; format=flowed

Boost starts building at ~1800rpm, 1500rpm is where I am out of stall,
ymmv on an automatic. More boost does mean you are burning more fuel
automatically because of the ALDA on those cars equipped with them, the
electronic IPs are a different beast altogether. Engine efficiency does
not equal MPG as does optimal not equal minimal. I am pretty sure fuel
is not increased on load as the bench tests dont involve load. Again on
the mechanical IPs. If fuel did increase on load you would not have to
move the pedal when you go up a hill.

I could be totally wrong on this part, the OP mentioned that a heavy
load ruined his axles, this is actually possible IMO, as it happened
with me (atleast this is my theory). As your rear sags (in my case I
lowered the car) the angle that the joints work at changes. Youve spent
a hundred thousand miles at essentially one angle. Then bam, you've
changed the angle, increased the load on the joint and the balls start
tearing into new metal. Then the trip is over and suddenly you are back
to the 100k wear mark but suddenly you have alot more area to move in.

-Rolf

On 07/29/2011 03:33 PM, Curt Raymond wrote:
 Why 1500rpm? The turbo isn't kicking in at 1500 rpm... More boost doesn't 
 equal more fuel being burnt automatically, the load on the engine plays into 
 that. I don't know HOW but it does. The turbo makes the engine more efficient 
 not less, if you're not into the turbo you're not making optimal efficiency 
 which is where optimal fuel economy will come in.

 An OM601 IIRC has its peak torque somewhere around 2500rpm so with my '85 
 190D I used to endevor to keep it there. With the 5spd that was somewhere 
 around 62mph in 5th. In later testing I realized it didn't make a whole lot 
 of difference to my fuel economy what the speed of the engine was, it was 
 more on the speed of the CAR. The sweet spot still seemed to be around 62mph, 
 slower than that and I went stir crazy, faster and the fuel gauge dropped 
 faster than  I like.

 -Curt

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Re: [MBZ] Bearing kit and special tool? Now chaning a cv, shaft too...

2011-07-29 Thread MG
Doesn't a manual boost controller just take the place of the 
waste gate? If so then I would still have just the 5-6 lbs at 
55-60. The boost only goes higher then that when I really push 
the peddle down to accelerate fast and it will go up fast and 
then stop right at 9lbs. It doesn't matter if I am going 45 or 60 
when I nail it the boost pops up and then stops at 9. When I let 
off to go to cruise the boost comes down just as fast to whatever 
the steady state pressure is for that speed. I can see where a 
manual boost controller will allow the boost to go higher at the 
top end but don't really see it increasing the boost at 5-6lbs. I 
don't think the spring is that weak that it would be letting 
exhaust by at that low a pressure, especially in the one that has 
just been rebuilt. From what I have read in a lot of different 
places 9lbs seems to be the most reported top pressure in 
unmodified turbos. I have been thinking of turning the spring 
adjustment to try and raise the top boost but haven't had the 
time to remove and dissect one of the turbos and do that. When I 
get to that I will let everyone know what I found out.
Right now I just took time out to pull all the trim off the 300D 
and get the worst dents taken out and repainted. Looks quite nice 
but I wish I hadn't done it. Now I worry all the time about 
someone banging into it with their door. I've taken to parking 
farther away and walking a bit. May get over that in a while or I 
may just sell it so I don't have to worry about it any more.


Manfred

Date: Fri, 29 Jul 2011 13:28:41 -0400
From: Rolf r...@winmutt.com
To: mercedes@okiebenz.com
Subject: Re: [MBZ] Bearing kit and special tool? Now chaning a cv,
shaft too...
Message-ID: 4e32edc9.9090...@winmutt.com
Content-Type: text/plain; charset=ISO-8859-1; format=flowed

Proper boost is 11psi. Youd be surprised how much of a diff 2-3 psi
makes. You might be able to increase cruising boost by using a manual
boost controller. The waste gate will start opening as it 
approaches max
psi, making for more of a curve, with the mbc you get a straight 
ride up

and then a direct fall off.

-Rolf

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Re: [MBZ] Bearing kit and special tool? Now chaning a cv, shaft too...

2011-07-29 Thread Peter Frederick
11 psi is the max for a 617, but 14 psi is normal for a 603.  You  
will get a bit more power at 11 than at 9 on a 617, but you will get  
greatly accelerated engine wear above 11.


Note that the intake pressure and fuel delivery are related but not  
by a fixed amount.  The governor will reduce the fuel even at high  
pressure if the engine speed is correct, although if you are not at  
high load, this will also reduce the pressure, but not in a linear way.


Peter


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Re: [MBZ] Bearing kit and special tool? Now chaning a cv shaft too...

2011-07-29 Thread Fmiser
  Rolf r...@winmutt.com wrote:
  
  Boost starts building at ~1800rpm, 1500rpm is where I am
  out of stall, ymmv on an automatic. More boost does mean
  you are burning more fuel automatically because of the
  ALDA on those cars equipped with them, the electronic IPs
  are a different beast altogether. Engine efficiency does
  not equal MPG as does optimal not equal minimal. 

 Curt Raymond wrote:

 Have you done any actual testing to prove this theory? Its
 just that your suggestions go against everything I've ever
 read about diesel theory and my own results. Unfortunately I
 don't have any results involving a turbo so my ideas are
 totally based on NA engines but I do have a good feel
 (150,000 + documented miles) for how the NA engines perform
 in 190Ds and 240Ds.

At a give RPM and a given fuel rack position on an engine with
an ALDA adding boost will increase the fuel used.

But that's not how most of us drive because we don't directly
care what the power output is, we regulate the RPM against the
load by changing the fuel used.

With the turbo contributing generously, more heat energy from
the fuel is turned into torque.  So if you were to compare the
fuel rack position on an engines with a matching load and RPM
once with turbo and once without the non-turbo run would have
the rack delivering more fuel.  The ALDA would notice the lack
of boost and decrease the fuel delivered.  Still, the amount
of fuel required by the non-turbo run would be more than the
turbo despite the ALDA allowing more fuel. That's because the
turbo increases efficiency, the fuel needed to maintain RPM at
that load will be _less_ with the turbo because less heat is
wasted.

Add to the confusion the torque curve, the efficiency curve,
air resistance curve, etc and it's pretty complex to try to
calculate.

However, efficiency _does_ equal MPG.  The problem is trying
to get the dozen other factors to match so apples are compared
to apples. 

-- Philip, with some spreadsheets to help with the calculating

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Re: [MBZ] Bearing kit and special tool? Now chaning a cv shaft too...

2011-07-28 Thread Michael Canfield
I do not know who that is.
  Having more fun, found the right cv shaft is bad so I am learning how much
fun it is to swap over the older style shaft from my 78 coupe into the 83.
Not really too bad of a job to do.  I see no issues with running an old
style shaft on one side and a new style on the other..does anyone see a
problem with that?
  I am assuming that I killed the shaft and bearings because the car was
riding so low and grossly overloaded on my 900 mile trip to Detroit and
back.  I think I am going to consider swapping out a sls rear from a TD so
it hauls better.  I have all of the parts, I wonder if they are any
good..I might even swap the rear to 85 gears while I am at it and see if
it runs out better on the highway.

Mike
On Jul 28, 2011 2:04 PM, Rolf r...@winmutt.com wrote:
 Brian Carlton has the socket.

 -Rolf

 On 07/28/2011 01:53 PM, Michael Canfield wrote:
 Need to change rear wheel bearings in my 300d. I need the socket to fit
the
 locking nut on the inside of the bearing. Where is the best place to find
 one?

 Rusty?

 How about bearings and seals?

 Thanks, Mike
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Re: [MBZ] Bearing kit and special tool? Now chaning a cv shaft too...

2011-07-28 Thread Fmiser
 Michael Canfield wrote:

 I am assuming that I killed the shaft and
 bearings because the car was riding so low and grossly
 overloaded on my 900 mile trip to Detroit and back.

I doubt that had any effect on the axle shaft.  It carries no
load.  And if overloading the car caused shaft failure, I
would have chronic shaft failure problems and I don't.

 I think I am going to consider swapping out a sls rear from a TD so it
 hauls better.  I have all of the parts, I wonder if they are
 any good.

It should be possible, with a bit of work.  Cylinder head with
pump, tank, pipes, suspension valve, accumulators (spheres),
shocks.  Some fabrication will be needed, but nothing major.

 I might even swap the rear to 85 gears while I
 am at it and see if it runs out better on the highway.

I don't like the long-legged gearing on my 85.  The engine is
running too slow at low highway speeds. (Best I can remember.
The tach is still dead)  The turbo isn't really working much
at 55-60 mph.

--Philip

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Re: [MBZ] Bearing kit and special tool? Now chaning a cv shaft too...

2011-07-28 Thread Michael Canfield
I was thinking the 85 gears would get me better fuel economy at highway
speeds.  Maybe at the cost of worse mileage overall if the turbo isn't
spooled up enough at average travel speeds.

H.  I will have to experiment.  I see my rear control arm is getting
rusted through on the bottom so I will be dropping the whole rear suspension
assembly to replace that.  Guess that would be a good time to swap over some
parts from the wagons.

Mike
On Jul 28, 2011 5:39 PM, Fmiser fmi...@gmail.com wrote:
 Michael Canfield wrote:

 I am assuming that I killed the shaft and
 bearings because the car was riding so low and grossly
 overloaded on my 900 mile trip to Detroit and back.

 I doubt that had any effect on the axle shaft. It carries no
 load. And if overloading the car caused shaft failure, I
 would have chronic shaft failure problems and I don't.

 I think I am going to consider swapping out a sls rear from a TD so it
 hauls better. I have all of the parts, I wonder if they are
 any good.

 It should be possible, with a bit of work. Cylinder head with
 pump, tank, pipes, suspension valve, accumulators (spheres),
 shocks. Some fabrication will be needed, but nothing major.

 I might even swap the rear to 85 gears while I
 am at it and see if it runs out better on the highway.

 I don't like the long-legged gearing on my 85. The engine is
 running too slow at low highway speeds. (Best I can remember.
 The tach is still dead) The turbo isn't really working much
 at 55-60 mph.

 -- Philip

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Re: [MBZ] Bearing kit and special tool? Now chaning a cv shaft too...

2011-07-28 Thread Fmiser
 Michael Canfield wrote:

 I was thinking the 85 gears would get me better fuel economy
 at highway speeds.  Maybe at the cost of worse mileage overall
 if the turbo isn't spooled up enough at average travel speeds.

If you do a lot of 75-80 MPH driving and very little 50-60, it
might do fine.

--Philip

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Re: [MBZ] Bearing kit and special tool? Now chaning a cv shaft too...

2011-07-28 Thread Curt Raymond
Not on a diesel. The amount of fuel used to travel is directly related to the 
power required to move the car at that speed, it has little to do with the 
rotational speed of the engine. When I had my '85 190D I spent a bunch of time 
comparing my commute mpg between 4th and 5th gear. I could never find an 
appreciable difference in mpg, I saw a much bigger variation when using snow 
tires...

-Curt


Date: Thu, 28 Jul 2011 19:08:55 -0400
From: Michael Canfield slozuk...@gmail.com
To: Mercedes Discussion List mercedes@okiebenz.com
Subject: Re: [MBZ] Bearing kit and special tool? Now chaning a cv
shafttoo...
Message-ID:
CALHJ_1BvbtWYO5=hfr9ayxd+w_h_azcuvadnuacn5hrhhsr...@mail.gmail.com
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I was thinking the 85 gears would get me better fuel economy at highway
speeds.  Maybe at the cost of worse mileage overall if the turbo isn't
spooled up enough at average travel speeds.

H.  I will have to experiment.  I see my rear control arm is getting
rusted through on the bottom so I will be dropping the whole rear suspension
assembly to replace that.  Guess that would be a good time to swap over some
parts from the wagons.

Mike
On Jul 28, 2011 5:39 PM, Fmiser fmi...@gmail.com wrote:

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