Pretzel

Hello,
I purchased the Trifecta tune and was sent 2 files.
1. for E47 and 1 for GAS or 93 octane.

I tried the E47 tune first and was getting a good 26psi boost. Competitive mode button ON. I was very please with the tune as it was an improvement over the GMTU.
Since there is only one gas station near me with E85 I deiced to try the GAS tune.

After i burned off the E47 mix and filled the tank half full with 93 octane.Loaded the Trifecta GAS tune and I will not see any boosts over 15psi.
But when I switch to the GMTU tune via the Competitive mode (OFF) button I get 22psi boost? In the same condition.
I tried the cruz control button and no change. I reloaded the file 3 times.

I did email Vince..

Whats your opinion?

I see Trifecta isn't doing tunes for HHR SS Automatics anymore.......

donbrew

The computer has rules about calculating the mix. I imagine the Trifecta is the same sort of thing, maybe more involved.

From Mitchell OnDemand: