PDA

View Full Version : At what Ratio do you...


short4stuff
10-23-2003, 04:22 PM
Have to run high octance gas??

Question:

What is the highest compression i can run 91 octane gas on, with out messing up the piston/ hearing pinging?
86waterpumper
10-23-2003, 05:20 PM
there is no magical number for detonation, just like jetting it relies on various factors. It is pretty safe to assume however, that premium gas (93 octane in my neck of the woods) is sufficient for stock motors, and aftermarket pistons up to around 10:1 compression, and anything over that I would be running race gas.
short4stuff
10-23-2003, 05:24 PM
alrigh then.. in my neck of the woods i am 99.9% sure that the premium octane gas is 91