[Apexeater]

Just curious if anyone has measured how much (if any) performance is pulled back by using 91 octane in place of the recommended 93. In AZ I don't have a choice but to use our crappy 91.

[mike@x-ph.com]

that depends on your map, which map are you using

Note: you dont have the regular 91, Arizona 91 is even lower quality than the 91 that the rest of the country gets

[Apexeater]

Originally Posted by mike@x-ph.com

that depends on your map, which map are you using

Note: you dont have the regular 91, Arizona 91 is even lower quality than the 91 that the rest of the country gets

I'm a 21, so no tune at this time

[mike@x-ph.com]

Originally Posted by Apexeater

I'm a 21, so no tune at this time

you can use 91 in this case , but depending on the conditions, the 93 might perform better

[bhong]

I'm in California so we also have the ACN 91 octane. I have been on the stock and stage 1 Carbahn tune and have experimented with mixing 100 octane race fuel with 91 to make 93 octane. There is without a doubt a difference in power and delivery. Throttle inputs are sharper, smoother delivery, and better top end on 93 vs 91. This is with stock and stage 1 tunes and experienced on a butt dyno.