got my jlt and x3 today from american muscle. ordered a 93 race tune and a 91 performance tune. im running 93 octane in the car and im detonating with both tunes. any suggestions? Is there anything i can change with the handheld or should i wait till bamachips opens in the morning and call them?
detonation
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SpartaPerformance
10 Year Member
I'ld wait till the morning to be honest, however if you can't resist try lowering the timing by 2 degrees at a clip in the RPM band where she starts detonating.
'08GTcaRED
New Member
Did you run through a whole tank of 93 before you put the tune in? What were you running before? If you were runnning a lower octane and then filled up with 93 and put the tune in, it could be mixed and have lowered the octane rating so that you are getting detonation. Something to consider as well...
SpartaPerformance
10 Year Member
That could be your problem, run another complete tank of 93, on the next tank then try the original tune settings, start with 91 and on yet another tank try 93 just to be on safe side
AutoXRacer
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- Mar 3, 2009
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'08GTcaRED
New Member
Glad it is fixed. Detonation is a big 
Mustanglvr2006
New Member
I had about an 1/8 of a tank of 87 in mine when I filled it up with 93 on Friday night, honestly I was a little concerned that the little bit of 87 left in the tank would possibly change the octane level of the 93 I just put in, and installed SCT/SF3's 93 tune on Saturday, and I have not had any detonation or any other adverse affects, thankfully.
Glad to hear you got it sorted out
Glad to hear you got it sorted out
yea everything is well with it now. had a good night at the strip friday. need slicks and rear suspension now
