The Nascar Cup cars use 110 octane leaded gas. That is the same stuff that I use.
For a while the Craftsman truck series were running 9-1 motors making less hp but able to run pump gas.
Everybody that I talk to running 10.5 and higher and doing track time is running race gas.
I know their are lots of guys running 10.5 with pump gas and thay say their engine runs great. THEY AIN"T WORKING THEIR ENGINES.
Cranky
