Terry, I know a little about the series two. It has a v91 head with 42mm inlets and large inlet ports. The pistons have only around a 4cc dish. I believe the chamber volumes are 45cc but have not cced them. It has the soft Aussie block. I talked to Peter Parry (SOB past lister) about them a while back and I hazily remember that the pistons are ACL hyperutectic and the block has higher Silicon content in the casting??? He hates the blocks as they have softer bores and wear quicker than the Jap castings. That asside I have found the blocks acceptable for sprints/ hillclimbs and have not had a block failure in my experience of running them hard over the last two years. I believe my current engine is running about 10.3:1:1 with a 40.1cc head chamber volume. If the head volume is 45cc and if my piston ccing of 4cc is correct, then I would expect the C/R to be up a bit higher than you have stated ie 9.5:1 Go the L series! I am aiming for a 1min 45sec on the long track at winton on the 27th of jan. I'm still on a std cam!!! After that I will do some work on the suspension and stick a 4.4:1 open diff in and try to knock off CM510's time! Yee Har! Terry, do you know what the different piston dish volumes are for the other L20B versions? Cheers Trev
-----Original Message----- From: Terry Rudd [mailto:[EMAIL PROTECTED]] Sent: Tuesday, 8 January 2002 23:12 To: [EMAIL PROTECTED] Subject: RE: L/Z conversion Dave, Others have responded to your questions except for the L20B CR question. The first 200B had 8.5, the update with the crappo Aus block had the lowest CR (8.2 or 3), the Bluey S1 had 8.8, the S2 had 9.2. Mind you this is ex factory and it was controlled by the piston dish which is hardly rocket science, god know what engines are in most of them by now. Not all L20B's have the U67 head ex factory either, I can't just recall what the other head was called but they had smaller ports and valves. Someone else that knows L20B's specs better than me may be able to help. regards Terry -----Original Message----- From: [EMAIL PROTECTED] [mailto:[EMAIL PROTECTED]]On Behalf Of David Costello Sent: Tuesday, 8 January 2002 2:14 AM To: [EMAIL PROTECTED] Subject: Re: L/Z conversion which are the lowest compression L20's ? why doesn't using a Z20 limit gearbox choice? aren't they the same bolt pattern as an L20 ? what would be the best bolt up gearbox for what's planned to be a very mean Z series? will an FJ20DET box bolt up? Dave ----- Original Message ----- From: Terry Rudd <mailto:[EMAIL PROTECTED]> To: [EMAIL PROTECTED] <mailto:[EMAIL PROTECTED]> Sent: Monday, January 07, 2002 9:51 PM Subject: RE: L/Z conversion Dave, A U67 and a Z18ET head have exactly the same chamber volume i.e. 45.2cc so the compression ratio would be all but the same (allow small variance due to head gasket thickness, shaves etc) CR of L20B varies from 8.2:1 to 9.2:1 depending on year - Black top S2 Bluebird is the highest. regards Terry -----Original Message----- From: [EMAIL PROTECTED] <mailto:[EMAIL PROTECTED]> [mailto:[EMAIL PROTECTED]]On Behalf Of David Costello Sent: Monday, 7 January 2002 7:35 PM To: Ozdat Mailing List Subject: L/Z conversion guys what compression ratio would you end up with if you put a Z18ET head on an L20B or Z20 bottom end? is either block stronger? the L20 or the Z20? could I get enough shaved off the top of the L20 pistons to use the Z18 head? Dave --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/[email protected]/ --------------------------------------------------------------------- --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/[email protected]/ --------------------------------------------------------------------- --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/[email protected]/ --------------------------------------------------------------------- --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/[email protected]/ --------------------------------------------------------------------- --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/[email protected]/ ---------------------------------------------------------------------
