Any feel like having a tuning discussion?

[ChevyHighPerformance]

Originally Posted by H3.007

F5 - Are these tunes legit? If so, why wouldn't GM be offering them? I just happened to see a show the other day where an ASE Tech Inspector witnessed an HP test at GM. It was really cool how they did it... Glad to know that such tech claims are third party regulated (kinda like a UL for the auto industry and no offense to GM). This keeps everyone honest...

I know you didn't ask me, but I feel the tunes are legit. I just loaded Alvin's tune (from PCMforLess) and the idle was very smooth and the low end torque boost is impressive (it was much better than my custom tune). Throttle is very responsive down low.

[H3.007]

CHP - how long did it take you to complete this process?

[ChevyHighPerformance]

Originally Posted by H3.007

CHP - how long did it take you to complete this process?

The initial tune took about an hour to modify tables for a baseline. Then to "calibrate" the MAF took about 1/2 hour. Modifiying the shifting tables is 10 minutes each time, but then I go for a 20 minute ride to see how it feels then tweak again.

From looking at Alvin's tune (from PCMforLess) there is more I could/should have done. For example, I modified the timing tables by adding timing evenly everywhere. Alvin's timing table shows that he did additional work in certain locations above what I did, and he modified some tables that I missed.

I guess to start from scratch and to produce what Alvin did would take several days of tweaking and road testing.

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