Diablosport Performance Tune.
 

Anyone have any issues with the tune running on 91 octane? That's all we have in Cali.

your problem is gas... cali is on 90 or 91 i think - use the tuner to turn up the A/F and retard the timing a little bit untill it doesnt knock anymore

Should be fine, however, you need to check for detonaation(pingin) when using 91oc, if you get detonation go and use "Modify Tune" and adjust Spark Advance to a 10% retard in both ranges and see if that fixes it.

they dont hav 93 in colorado, just 91. Badfish and i both have diablo tunes and run 91oc, havent had any problems

yep, no problems here

Ripper is right on....if you get any pinging issues back off the timing by 10%. You should be ok though. I think the timing in the diablo canned tune is pretty mild. I ran the diablo tune in my 03 GT and it was just fine.

Good to hear. Thanks.