Computer Diagnostics and Tuning Technical discussion on diagnostics and programming of the F-body computers

Tuning newb ?'s Added heads.

Old Apr 11, 2008 | 10:50 AM
  #1  
kgkern01's Avatar
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Tuning newb ?'s Added heads.

So when I was just CAI and cutout/catback I sent my PCM to MadZ28.com for programming and gained 18rwhp/12rwtq. I have since added Hooker LT's, 1.7RR, and stage 2 ported heads and Impy head gaskets putting my compression around 11.2 I believe. I now have a laptop and TunerCat and DataMaster, what changes should I make to my tune to match/compensate for my new mods?

I can log a WOT 1st thru 2nd gear run in DataMaster and send that with my current tune from TunerCat to anyone interested to help.

Thanks!
Old Apr 11, 2008 | 12:27 PM
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Now that you have some ported heads you moving alot more air through the motor which means that your going to need more fuel. Seeing that youve already had your pcm tuned already and that person probably took fuel out your best best is actually to get on the dyno with a wide band and check your air/fuel. Your narrow band o2's arent going to tell you much about how lean or fat your running.
Old Apr 12, 2008 | 08:25 AM
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So basically there is nothing to do or look at without logging wideband A/F on a dyno first?
Old Apr 12, 2008 | 10:48 AM
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Originally Posted by kgkern01
So basically there is nothing to do or look at without logging wideband A/F on a dyno first?
If everything else is fine I would just make sure your fuel trims are close to 128. Othen than that I would it the dyno and get your air/fuel correct.
Old Apr 14, 2008 | 03:21 PM
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So I did a 0-70 mph run logged with DataMaster. I had a lot of wheelspin on takeoff (M29 T56 on street tires, 50*) and noticed that my INJ DC was 106.6/100.2 at one point, so I assume that I am maxing out the stock injectors at my power level?

If anyone wants to look at it and tell me what else it is telling me, I would appreciate it, and I can email it.
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