usd2sing

iTrader: (15)

hi all,
quick question.
if tuned for 93 oct.
then used straight 100oct on the dyno without changing any tuning will it show lean on the dyno pulls??

thanks

oange ss

iTrader: (50)

rich if the motor doesnt need it

RotaryMuffler

iTrader: (2)

100 octane takes longer to burn then 93 oct. So, if your not tuned for it, in theory, you should run leaner on the afr then with 93. Just from a scientific point of view. But it could show up richer like oange ss said. I'm not 100 percent sure on this.

usd2sing

iTrader: (15)

thanks guys. the reason i asked is because i went to the dyno with straight 100oct in the tank. got afr readings alot leaner than i have ever had before...and lower pwr levels.


thanks a bunch.