RE: Comp ratio.

[E Smith]

Kris, We would need the chamber volume of the head to work it out accurately, but with 0.060" of the head the chamber should be about 35.3cc. This would give a comp ratio as you said of about 10.5 to one if you have 3mm dish pistons. The thing to remember is the cam you are using gives a dynamic compression of 8.4 to one due to valve timing..     Cheers, Feral Errol <http://www.datrats.com.au/> -----Original Message----- From: [EMAIL PROTECTED] [mailto:[EMAIL PROTECTED]]On Behalf Of Kristian Walsham Sent: Wednesday, February 05, 2003 9:20 PM To: [EMAIL PROTECTED] Subject: Fw: Comp ratio.       Hi, All         I was wondering if someone could work out a compression ratio for me please. I have an L18 SSS block with an A87 head that has had 60 thou shaved of it. The bore is approx. 85.7mm with standard 1mm dished pistons. I`m running a Wade 663 cam (72deg?). Standard head gasket.           I`m not after an exact figure as i just would like to know whether i should be running 98 instead of 96 Octane fuel, so something close enough will be fine. I`m thinking it will be up near 10.4 to 10.5:1 as a guess.    I currently use 96 octane with no pinging. I`ve had the 32/36 tuned. I know i should be using twin 45`s with this cam, it`s just i had this cam and head and just wanted to have some fun.    I love the idle it has though ;)   Kris. --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/ ---------------------------------------------------------------------