on a tune from preditor
This is a discussion on on a tune from preditor within the GTO forums, part of the Vehicle Specific category; Has anyone been able to do a custom tune on there diablo for a 04 gto with heads and a ...
04-01-2008, 02:18 PM #1
on a tune from preditor
Has anyone been able to do a custom tune on there diablo for a 04 gto with heads and a 85mm airflow sensor and a cold air intake, just wondering and if you can share it with me that would be great, i cant get my long terms lower then -5 -6 range .
04-01-2008, 02:59 PM #2
What's your injector slope set to?
04-02-2008, 11:52 AM #3
04-02-2008, 03:38 PM #4
Adjust to -5 or -6 and drive for about 20 minutes and then read your LTFT's.
Adjust as necessary, I like to run at -2 to 0. I feel better knowing the PCM is reducing the fuel a touch rather than adding...
04-03-2008, 02:03 PM #5
Hey silver can you send me your tune iam trying to get a more aggressive tune but thanks for the info
04-04-2008, 01:05 AM #6
Injector Slope -14%
WOT Spark Advance
4K-7K +6% to +8%
WOT Fuel Mixture
2K-4K +1% - these were set higher, as much as 10%
I will be keeping an eye on these as weather warms just to make sure I don't get lean.
5% on timing is supposed to equate 1 degree.
This year I've been tinkering with it again. I've had the sled out and the LTFT are -1%. Last year I'd up the fuel and advance the spark without any method to my madness. This year I've re-set both to '0', incrementally advance the spark and not added fuel while monitoring the knock. I was looking at my exhaust tips and there a bit black so I've cut back the fuel.
It takes about 20-30 minutes to let the PCM adjust to new settings.
Then start with advancing the timing.
(I was just reviewing the Diablo web site and found some interesting information.
If I read it correctly once you have the LTFT set, which creates a lot of debate on another site, you can advance the timing without screwing around WOT fuel. The PCM handles the rest)
I've advanced the timing - reduced the WOT from original settings above. I attempted to monitor my Mv's, a lot traffic... They're supposed to be between 85X and 92X which is supposed to indicate a indicate a good A/F ratio. I'd reduced WOT to +3% and it's the first time I'd gotten close to ~87X. Below 87X is rich and above 95X is lean.
I have an M6 so I do not have any settings for A-trans. There's a couple of threads below and one of them has those settngs.
I've removed a portions of my MAF screen. On each side of the sensors - based on my past experience it's important to maintain smooth air over the sensors to hold an idle. Given the tube for my K & N is smooth I will be incrementally reducing the screen. The old tube is flexible and disrupted air flow. That's why my slope is set so high...
04-05-2008, 12:59 PM #7
04-05-2008, 03:50 PM #8
If i go past 8 or so ill throw the engine light saying that iam running rich, also were do you want your long trims and short trims to be and what speed do you go by when you check them.
04-05-2008, 03:59 PM #9
04-06-2008, 02:43 AM #10
Don't be concerned with STFT's. If LTFT's are between -5% & +5% you are meeting the parameters of the software. The closer you get to 0% the better...
I had read somewhere STFT's are compiled to represent LTFT's, but I (in my opinion) beleive it's showing what the pcm is managing at that moment while LTFT's are the overall performance of the motor.
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