91 Tune on 93 oct

[prohunter]

Is it safe to run 93oct on a 91 tune for a V6 charger

[bighemitex]

that's fine, just as long as you don't run lower octane than the tune is rated at. if anything using slightly higher octane will help prevent knock. I use 93 with the 91 tune all the time and it gets better results than the 93 tune and 93 octane

[prohunter]

Ok I tried the 91 tune on 93oct and it seems to be better on the 93 tune and 93oct. Now my question to u is should I play with the timing?

[Mike_Levy]

Don't mess with the timing. If its better on the 91 tune its because it likes less timing. The only difference between the 91 and 93 tunes is 2° of timing.

[prohunter]

It seems better on the 93 tune with 93 oct and 15% thorttle boost and tire size set