91 Octane

Not much of a difference.. supposedly increased boost and timing "some"..?

Stage 2, down pipe, intake

91 tune with Shell 93 on the tank. 40 to 100 4th gear

Fuel in Tank (1.0 gal of Shell 91, 1 gal E85, rest of tank Shell V Power 93)

Cooler tempatures car has 1 bar spring with crack around 12 psi on bench

Outside temp is 96 degree Back to back pulls