let er eat

Which Is more powerful, the Diablo tune or 91 octane tune...currently running 93 octane.

b0xm0ns73r

I think (and I could be wrong....as I usually am once a year or so) the Diablo tune is their 93 octane tune. So probably the Diablo tune. Maybe Mike will chime in.

let er eat

That's what I figure but I just wanted to check

Kouasupra

The Diablo tune is the 93 tune. If you pump 93 octane go with the Diablo tune.

Mike's LS3

It depends on knock retard. If you install the 93 tune (Diablo) and use 91 octane gas, the ECM (thru knock sensor) might pull timing and your down 15 or so hp. If you run the 91 tune with 91 octane and no knock retard is present, then no timing will be pulled.

This is why data logging is important to check to see if K.R. is present. If so, adjustments can be made to prevent knock retard and the loss of power no matter what tune is installed.

Sometimes it only takes 1 or 2 degrees of less timing in the tune to prevent the knock sensor from pulling 7 degrees of timing.

let er eat

93 octane is readily available at sunoco and Exxon around here so I'm not too worried about that.

Jcbarr25

is there 93 octane around Fairfield, CA??? maybe one of you guys know!

let er eat

Try gas buddy.com that may help ya

let er eat

It just says premium not the octane rating...some stations here have 91 as premium and 93 as something else and some have premium as 93 with no 91 available...

Mike's LS3

In CA I have only seen 91 octane, except for Sonoma Raceway which offer higher octane and race gas for a premium price. I wish I lived in a state where I can pull up to a gas station and pump 93 octane!

let er eat

One sunoco had 100 octane for a long time...not sure if they still do