----- Original Message -----
Sent: Monday, June 04, 2001 7:12 PM
Subject: Re: A question of pistons
Daniel,
I believe (somebody correct me if I'm wrong) that
your Z18 has the same piston and rod combination as an L18r, which would mean
130.2mm conrods and 38.1mm pistons. The RB30ET pistons have
a 32.1mm compression height which means you'd get about 5.5:1! If
you used L16/L24 rods, you would get about 6.5:1, and more revs. With
L14 rods (longer still than L16 rods) you would get about 8.4:1 and a very rev
happy little motor. This assumes 87mm bore (+1mm for a RB30ET piston)
and approx 10cc dish (that's a guess by the way)
Very turbo-friendly compression ratios, big big
HP with lots of boost, but a pig without it unless you can hunt down some L14
conrods. Depends what kind of engine you're after really. By the
way, if you're going to the trouble of building a short motor why not start
off with a 2 litre block? Or bigger?
Just my 2c
- Tom
----- Original Message -----
Sent: Monday, June 04, 2001 9:44
AM
Subject: A question of pistons
List,
within the next month I am looking at
rebuilding the short motor for my Z-18et project. Someone a while ago
mentioned that VL turbo pistons have the same/close to pin height and same
bore diameter as stock Z-18et ones, can anyone confirm this? I see these as
a good piston to use for a street car without having to go to the expense of
forgies as there is a VL turbo running around with 357kW at the back wheels
and stock internals! Its been pretty reliable as I understand
it. Comments/suggestions would be greatly appreciated as this is a
subject I'm a little hazy on.
Daniel Kroehn
Recommending Datrats,
supplying quality Datsun performance parts
www.Datrats.com.au
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