Hi.

Just interested in everybodies experience with maximum compression ratios.

I have bought a 1000 race car with a hot A15 which needs a rebuild. It is currently running a 55/85 cam with massive port job on head and twin 45's. The current c/r is very high and runs fine. Idles under 1000rpm when warm and goes like stink down the straights.

To make matters more interesting, the race fuel it has been running is being phased out, so I need to set it up for premium unleaded (98 octane). I need some definate figures for what works and what doesn't !! Can anyone help me ??

QIK1000