Re: Comp ratio.

[andrew smith]

The dynamic compression is close to the magic mark which should make it a good little grunter especially with some bigger carbs. E Smith wrote: 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/ --------------------------------------------------------------------- --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/ ---------------------------------------------------------------------