socalstreetracer

iTrader: (4)

I went back for another dyno on a 100 octane(5gallons)with about 1/2 gallon of 91 left in the tank....I didnt know race gas changes a/f so dramatically...a week ago on 91 the a/f was dead on at 11.1 then on 100 octane a week later a/f was at 11.5 spiking to 13.0!!!....anyways after I got the a/f back to 11.1-ish and 17 timing the car started making nice power. The runs are from 5.5psi...7psi...then 8.8psi made the best power...I got no knock and I wanted to run more timing and boost but I had to be somewhere and time was against me...anyways cats will be gone soon then I will get another dyno..
-MIKe

mahhddgtp

very nice numbers.

can anyone confirm that running a high octane fuel like that effecting A/F that much? 11.1 to 13.0? Yowza.

SStolen

iTrader: (22)

I also wan to know, ttt.

camcojb

I haven't seen 2 full points, but I've seen .5 to .75 of a point with race unleaded versus pump 91 octane.

Jody

Zombie

iTrader: (2)

Oh man, wait until you get the boost bug like me.

Different gas changes the tune due to the specific gravity of the fuel. I've noticed I lean out about .5 point when running most leaded fuel vs 91 octane. I always tune my car for 11.0.

P.S. My low boost setting is 10psi with a t76.

OUTLAWZ RACING

iTrader: (9)

I Ran 110 Octain On The Dyno Along With 93 I Had 8 Gallons 110 And 3 Gallons 93 Drove 50 Miles To Dyno No Change In Afr Still 11.3 Boost Is Strange I Also Pick Up 25 Hp With No Change To The Tune Im Not Happy Yet 427 Due Soon Maby This Friday It Will Be Done But We Will See

socalstreetracer

iTrader: (4)

what is the max timing I would be able to run with 110 or 116 octane?.

OUTLAWZ RACING

iTrader: (9)

ask a tuner man it verys from cold days hot days who knows i would not max anything on fi