If we are on E85 what will make more power and torque safely and with less heat.
9.5:1 dished pistons with very nice smooth tops and almost no valve cut outs - along with 22lbs boost.
11.5:1 domes with big ugly cut outs, but only 15lbs of boost?
the smooth 9.5:1 piston crowns helping flame travel and removal of hot spots. the 11.5:1 increasing efficiency, torque, and rpm, requiring less boost. Assume the system is not boost limited i.e. 88mm single turbo, sleeved block, huge fuel system, etc..
There is of course a limit to reducing compression too far to allow for big boost, but lately I've seen a trend for high compression and medium boost over the old standards.
indycar is 12.5:1 with 22.4lbs boost and no DI. F1 with DI will be in the range of 13:1 compression ratio with 50lbs of boost!
However, top fuel is only 6:1 compression ratio and they have 60+ psi of boost (80 Psi or more with the new blowers).
What is the JPC record car doing for boost?
9.5:1 dished pistons with very nice smooth tops and almost no valve cut outs - along with 22lbs boost.
11.5:1 domes with big ugly cut outs, but only 15lbs of boost?
the smooth 9.5:1 piston crowns helping flame travel and removal of hot spots. the 11.5:1 increasing efficiency, torque, and rpm, requiring less boost. Assume the system is not boost limited i.e. 88mm single turbo, sleeved block, huge fuel system, etc..
There is of course a limit to reducing compression too far to allow for big boost, but lately I've seen a trend for high compression and medium boost over the old standards.
indycar is 12.5:1 with 22.4lbs boost and no DI. F1 with DI will be in the range of 13:1 compression ratio with 50lbs of boost!
However, top fuel is only 6:1 compression ratio and they have 60+ psi of boost (80 Psi or more with the new blowers).
What is the JPC record car doing for boost?
