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Old 04-01-2010, 05:58 AM   #1
RBC2010SSRS's Avatar
Drives: 2010 SS RS 6spd. 402 rwhp
Join Date: Nov 2009
Location: Ft Worth TX
Posts: 70
DIABLO Predator tune, CAT delete??? is there a variable adjustment for this?

I read all the tunning posts I could find. From what I understand Getting the LTFT's around 0 to -2 is the idea for the fuel mixture.

I selected all the variables to watch on Real time read or whatever, was reading around -6 and -7 for the two FTFT readings on the first few runs. I adjusted the injector slope 7% up and ran the test three more time's and had the readings averaging -1 and lower on both.

What else is there to tune besides the fuel mixture?

Got the Shift skip eliminated (THANK GOD).

My Cats are cut out so what adjustment should i make there?? I read something about extra fuel to cool the O2 sensors and cats, sooo could i go lean??
LS3 dreamin
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Old 04-01-2010, 07:08 AM   #2
Drives: IOM 2SS/RS
Join Date: Jul 2009
Location: North NJ
Posts: 196
With no cats you are going to throw a check engine light. Unfortunately there are no user adjustable parameters to compensate for no cats, you would need a custom tune for that. Also, I was told that adjusting your injector slope is not the proper way to tune the car. I originally played around with the ltft's with my Trinity but reset everything when I was told it wasn't the right thing to do. Jannetty Racing installed a set of lt headers and dyno tuned my car using Diablo's tuning software. I can now revert back to the stock tune if need be and than re-install my custom tune afterwards. If I were you I would call Ted at Janetty Racing and let him set you up with an e-mail tune. You won't have to chase your ltft's because the way you're doing it now, they will change with different weather conditions.
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