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Old 09-11-2013, 03:43 PM   #432 (permalink)
Sh0velMan
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Quote:
Originally Posted by synolimit View Post
Any knock? The AFR was rising till that dip point then it fell along with the power and TQ
I wasn't looking @ knock counts, but timing wasn't pulled, so I can pretty safely assume that there wasn't excessive knock.

There's a dynamic around that area that I don't understand, and I honestly don't know if any of the tuners really understand it either, because I'm pretty sure it all revolves around VVEL.

I didn't log VVEL position (You always think of these things afterwards, not while you're sitting in the car sweating) so I can't try and correlate any of it to that.

Maybe a pro tuner can help me figure it out... It may be as simple as a plumbing issue though. Definitely looks like there is a specific flow limit it reaches and from there on, it's down hill. It happens later in the rev range on the old exhaust/tune than it does now, but it's the same limit.
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