differnce in tunes

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I have a 2010 challenger 5.7, What is the difference between the 91 tune and the diablo tune. I started with the 91 ran fine switched to the diable tune and on WOT it started to backfire and reported 14 on knock so I shut it down went back to 91 wondering why it runs so awful on the diablo tune

[sbenja2008]

I have a 2010 challenger 5.7, What is the difference between the 91 tune and the diablo tune. I started with the 91 ran fine switched to the diable tune and on WOT it started to backfire and reported 14 on knock so I shut it down went back to 91 wondering why it runs so awful on the diablo tune

What fuel are you running? The Diablo tune was a 93 oct tune on my 13 challenger.

[06MonteSS]

Diablo Tune is for 93 octane gas... has higher timing/spark advance settings meant for 93 octane gas...

91 octane tune is for 91 octane gas...