Re: A question of pistons

[Tom Richardson]

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 ----- From: Daniel Kroehn To: [EMAIL PROTECTED] 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   --membersozdat------------------------------------------------------- OZDAT Mailing List Please Note:- Send (un)subscribe requests to [EMAIL PROTECTED] Send submissions to [EMAIL PROTECTED] No unauthorised redistribution of this email http://www.ozdat.com/ozdatonline/index.htm http://www.ozdat.com/ozdatonline/listindex.html http://www.mail-archive.com/membersozdat@datascribe.com.au/ --------------------------------------------------------------------- --membersozdat------------------------------------------------------- OZDAT Mailing List Please Note:- Send (un)subscribe requests to [EMAIL PROTECTED] Send submissions to [EMAIL PROTECTED] No unauthorised redistribution of this email http://www.ozdat.com/ozdatonline/index.htm http://www.ozdat.com/ozdatonline/listindex.html http://www.mail-archive.com/membersozdat@datascribe.com.au/ ---------------------------------------------------------------------