I agree Nate, if you are going to make adjustments to advance mechanisms you
should have at least an adjustable timing light. We are finding that 24 to 28
degrees total @ 2800 RPM is a good range for both V/8's and Sixes. Remember 14
dist. is 28 crank degrees. We have also found on rebuilt engines we have to jet
up slightly to eliminate the slight ping due to increased compression more
efficient exhaust systems. Have fun.
Lee
Prosser WA
----- Original Message -----
From: vwnate1
To: old-chevy-truck@yahoogroups.com
Sent: Friday, November 03, 2006 9:17 AM
Subject: *Possible SPAM* [old-chevy-truck] Re: Maximum Ignition Timing Advance
Steve ;
That spec. is for the _mechanical_ advance part of your dizzy , most
also have some vacuum advance plus of course the ball bearing timing
mark is a few degrees BTDC .
What you need to discren is : _total asvance , all in , of al the
variables and this is easy so find , takes a specail tool though ~ a
timing light with the advance dial on the back of it ~ I use a SEARS
Crafstman inductive one I paid $50.00 for 20+ years ago and it's
still going strong . I'm told they're on E-bay for abot $20.00 .
Or , you can time it the way GM says to : warm it up and time it ,
take a drive , on flat , lever road in top gear @ 35 MPH , tramp the
foot feed to the floor ~ if you hear any ping , stop and retard the
timing a tiny bit and try again ~ keep on doinf this untill the ping
stops and you're good to go .
It's simple , not rocket science , it looks yo me like you're
makiing this way too complicated .
-Nate
--- In old-chevy-truck@yahoogroups.com, "Steve"
<[EMAIL PROTECTED]> wrote:
>
> Hello, all, I mentioned on a few accasions about the sometimes
pinging
> I would be getting when climbing grades, or accelerating too
fast. I'm
> using the Malory Unilite Electronic distributor---uses an infrared
> sender and receiver. No more dwell, no more pitted burned braker
> points, none of that no more, I've been happy with it for about a
> year. I learned here, but for anyone out there who may also need
to
> know here it is. I purchased the Unilite, I love it, everyone has
an
> LMC book its #36-2929. Works great. You all who always read know
I
> have a little irk with a pinging issue.
> I purchased at Oreily's the advace curve kit, don't think LMC has
it.
> It comes with the various springs you can readjust the advance
curves
> to however you likings, I'm not messing with that. I'm not that
> smart. But also it comes with the keys to adjust the maximam
amount of
> advance you are getting. LMC article says Malory has calibrated
it for
> the curves for normal driving conditions (springs). Yet I found
that
> you must yourself adjust the max on the advancement of time
yourself.
> The LMC book & Malory stuff with the Unilite doesn't inform you of
that.
> I guess maybe I'm just not the smartest, I know a lot of people
know a
> lot more than me, but I try. My shop manual has specs for
mechanical
> advance of the distributor--it had a vacuum unit on the original,
so I
> guess the original did both vacuum and some mechanical advance.
The
> mechanical advance in the specs says 12 to 14 degrees max of
> crankshaft whatever. Well the unilite has adjustment screws and
the
> kit advance kit has the keys to set the proper mechanical advance
based
> on my specs. My specs say 12-14 degrees. The Unilite was maxed
out all
> the way to 0 degrees. They don't calibrate and adjust this for
you.
> So it could advance way further than it is supposed to according
to my
> shop manual specs. I had to pull it out to loosen the hold down
screws
> for the advance plate, unfortionatly. One seemed to feel about
100
> foot pounds tight. Whatever, they appeared with my glasses on to
be
> 3/16 allen screws----so said Malory after a phone call, this tight
> screw. But found it was these crappy torx screws used for the
hold
> down 8-32, real small. Don't rely on who you call for info.
Anyway
> the adjustment is made, I only have to put it in tomorrow, it will
> advance at least 50% less than it was, you know I have been
mentioning
> the pinging thing in a few prior articles. I will soon see, and
so far
> I think I may have solved my own problem. Anyway, I'm boring, but
this
> is out there for everyone to see. Steve --
> ColumbusGA,FtBenningGA,PhenixCity,AL----59 Fleetside Apache 235
>
[Non-text portions of this message have been removed]
Ole Chevy and GMC trucks rule!
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