I'm guessing 10:1 is around the upper limit for todays's pump gas? Chamber size would be per factory J head.QUOTE]
On the comp I would shoot for no more then 10.0 on iron heads. If it is a good quench eng then you might get away up to 10.5 and still use 93 pump
Been watching this with interest from afar
I know I have probaly said this before but what is the high rated fuel generally
available in the States?
The reason for this in Australia when we plan a decent build of street engine
we allow for 98 octane as this is available everywhere and it is surprising that you guys build for 93 at the most.
Just thought in the home of performance there would be good fuel.
Cheers
Benton