My 434 is 11.2-1, solid roller, ported Indy heads and intake, it was built for pump 93. The engine was broke in and tuned on the dyno with Renegade Crate 98 leaded gas. After the tuning was done and several pulls made we drained the fuel cell and the carb. Then refilled the cell with pump 93 that I buy from a little country store just down the road from me.
With no other changes than the gas it made 30 more hp and the torque was up too. I thought it was a fluke so we cooled it off and made another pull and got within a couple tenths of the same numbers.
