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trond trond is offline
Registered User
Join Date: May 2008
Location: Stavanger, Norway
Posts: 594
thanks for the advice. I will go on 98 and octane booster when needed and on next occasion either change to 964 cams or 9.5CR pistons. Most likely for my driving style lower the CR and keep the SC cams I did cc the combustion chambers on assemby and found 58.5 ccm which with 98 mm*70.4mm bore & stroke corresponds to a theoretical 10.1:1CR. I thought at the time that might work with 91 US/95RON but now I think not.

I understand how a hotter cam with more overlap will give less cylinder pressure but thought that in the peak torque area where cylinder filling is best cylinder pressures will be equally high also with hotter cams. If not there would not be much point in hotter cams ?
80SC (ex California) 3.2SS

Last edited by trond; 08-21-2018 at 10:32 PM..
Old 08-21-2018, 09:36 PM
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