how much does everyone expect to pay for a good set of performance pistons?
I only ask because you all talk about pistons like they are the most
expensive part of the build up but I just put a set of 12:1 forged steel
light weight performance pistons in my 6cyl ford engine and they only cost
me just under $300
and there was cheaper ones I just got the top of the range ones
Dave
-----Original Message-----
From: Craig Overend <[EMAIL PROTECTED]>
To: [EMAIL PROTECTED] <[EMAIL PROTECTED]>
Date: Wednesday, 13 September 2000 11:59
Subject: Re: L18 W blocks.....
>Brad I'm building up an L18W block 2L engine. My piston budget will
>probably end up depending on what piston pin height I can find to do the
>job. I'll be starting this weekend on the block when I get it. I'm
>waiting on the wrecker to pull it to check that it's a genuine 720 L18W
>block with a 6 bolt crank and flywheel.
>
>Craig.
>
>Brad HALLETT wrote:
>>
>> Craig
>> What block do you want to use, and what is your piston budget?
>>
>> Regards
>> Brad HALLETT
>>
>> Proudly Endorsing:
>>
>> DATRATS
>> Datsun Dedicated
>> For Nissan Motorsport Components
>> Professional Budget Priced competition equipment
>>
>> http://203.33.35.34
>> Contact Errol SMITH
>> mailto:[EMAIL PROTECTED]
>>
>> -----Original Message-----
>> From: [EMAIL PROTECTED]
>> [mailto:[EMAIL PROTECTED]]On Behalf Of Craig Overend
>> Sent: Thursday, September 07, 2000 1:33 PM
>> To: [EMAIL PROTECTED]
>> Subject: Re: L18 W blocks.....
>>
>> Brad,
>> Do you know the minimum wall thickness after you ultrasounded the
>> block? I can probably use this to work out a required rod to stroke
>> ratio for reliability.
>> L20A rods are another option if you can get them. I'm pretty sure
>> they're 135mm. Anyone know for sure? I'm assuming the block is the same
>> height as L16/L18/L24/L26(207.8) and they used 38.1mm pin height that
>> gets
>> L20A stroke = 69.7
>> (69.7/2)+38.1+135 = 207.95
>> leaving piston 0.15mm above block deck, exactly the same as the L16.
>> They would probably require bigger rod bolts.
>>
>> Craig.
>>
>> Brad HALLETT wrote:
>> >
>> > The scuffing I experience was in a 2.1 litre short rod stroker and it
was
>> a
>> > shocker. All torque no revs. I have ultrasounded my L18W block and I
>> think
>> > 88mm is the safest bore size to use. Reduced chances of cracking
through
>> > cylinder wall flex at high revs and greater reliability without
>> sacrificing
>> > too much swept volume increase.
>> >
>> > If you wanna make them larger, stroke the crank (within reason) and use
>> L16
>> > rods. Much better way of increasing CR and volume.'
>> >
>> > Regards
>> > Brad
>> >
>> > -----Original Message-----
>> > From: [EMAIL PROTECTED]
>> > [mailto:[EMAIL PROTECTED]]On Behalf Of Terry &
Heather
>> > Sent: Tuesday, September 05, 2000 11:41 PM
>> > To: [EMAIL PROTECTED]
>> > Subject: RE: L18 W blocks.....
>> >
>> > Craig,
>> > Just catching up on the back log.
>> >
>> > Bore & Stroke for the L18W 1889cc works engine is 87.8mm x 78mm. This
is
>> the
>> > capacity used in the 710 SSS privateer spec WRC, it had 2x44mm Mikuni
and
>> > produced 170hp. The works teams use a 1941cc engine which had a DOHC
head
>> > and two huge jugs ~50 something mm and produced 210hp The figures that
you
>> > will see quoted in some guides are the tolerance allowed for
competition
>> ie
>> > usually +1mm as that was allowed in those days for most forms of
racing.
>> > Nissan considered 87.8mm a very safe bore for that engine and
>> theoretically
>> > will tolerate 88.8 or 3" bore but mine has never been bored so I can't
>> > comment on the 3" bore. I think Brad has and experienced scuffing? cant
>> > recall if it was that engine or another variation.
>> >
>> > terry
>> >
>> > -----Original Message-----
>> > From: [EMAIL PROTECTED]
>> > [mailto:[EMAIL PROTECTED]]On Behalf Of Craig Overend
>> > Sent: Friday, 25 August 2000 7:07 AM
>> > To: [EMAIL PROTECTED]
>> > Subject: Re: L18 W blocks.....
>> >
>> > Terry,
>> > do you know what bore & stroke size the 1889cc 710 SSS used?
Was
>> > 1889cc
>> > the actual capacity used in competition? I ask because 88.8mm works out
>> > to 1932cc using a 78mm crank. To get 1889cc you need 87.8mm bore x 78mm
>> > stroke. Did Nissan consider 87.8mm to be a safe diameter I wonder?
>> > Interestingly this gives a stroke to bore ratio of .89 which is near
>> > ideal for this engine.
>> >
>> > According to "How to Modify your Nissan/Datsun OHC Engine", Nissan
>> > 87-88.8mm sealing rings were available but were required to be .51mm
>> > larger than the piston diameter or a step in the top of the piston to
>> > clear. This would agree with the up to 88.8mm but at what reliability?
>> > How did you come about 88.8mm?
>> >
>> > regards,
>> > Craig.
>> >
>> > Terry & Heather wrote:
>> > >
>> > > Andy,
>> > > L18W blocks are very nice, not exactly rare but they are made in
Japan
>> > and
>> > > were sought after by Datto engine builders from yester year. I know
that
>> > > they can be bored out to 3.5" or 88.8mm as Nissan Motor sport used
the
>> > L18W
>> > > block in the 1889cc 710 SSS world rally car. I wouldn't have thought
an
>> > A87
>> > > head was that hard to find but I could be wrong as I haven't looked
for
>> a
>> > > while. I'll put the word out around here (Canberra) for you.
>> > >
>> > > regards
>> > >
>> > > Terry
>> > >
>> > > -----Original Message-----
>> > > From: [EMAIL PROTECTED]
>> > > [mailto:[EMAIL PROTECTED]]On Behalf Of Andy
Nielsen
>> > > Sent: Monday, 21 August 2000 9:46 AM
>> > > To: [EMAIL PROTECTED]
>> > > Subject: L18 W blocks.....
>> > >
>> > > Dear list,
>> > >
>> > > On a search of the local wreckers for a decent A87 head for a 2 litre
>> > motor
>> > > I am chucking together, I stumbled across 3 L18 W blocks. The
wreckers
>> > had
>> > > no idea what they were. And I heard they were rare. Hah. What are
>> they
>> > > worth? How far can you bore them? Where the hell is a decent A87
head?
>> > > Thanks peoples!
>> > >
>> > > Andy.
>> > >
________________________________________________________________________
>> > > Get Your Private, Free E-mail from MSN Hotmail at
http://www.hotmail.com
>> > >
>> >
>>
>
>
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