11-02-2021, 06:58 AM
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#3
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Drives: 2017 ZL1 A10 & 2021 BMW M340i x Dr
Join Date: Mar 2009
Location: Tampa
Posts: 5,111
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Quote:
Originally Posted by cjperformance
Well, i dont have great info, so wasnt going to chime in, but since its been a few days and no responses, ill add my 2 cents. The trick is knowing if and when you are getting real knock. Only sure way is on a dyno... and not even necessarily then, so its probably experience more than anything.
For me, i did an eth conversion, and was in a fuel and timing combo that absolutely no way should have any knock... and it was showing up. So it was just a judgement call. I raised the knock thresh 10% at a time until it was minimal KR. I think my my knock sensor thresh is around 4.8 or something currently. Ive seen them in the 6's on some tunes.
Long story short, i dont think theres a standard value you can just safely apply without considering the whole picture. I would say stock sensors are tuned to be very sensitive and could prob be raised by 10% with low risk, but beyond that i cant say. 10% isnt much but helped quiet some of the KR noise. My opinion is better safe than sorry.
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Thanks...i think im at 8% now and will just leave it. I still don't show any KR.
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2017 HyperBlue ZL1 A10 ** Born 3/17/17**Delivered 4/08/17
2020 Build: Mag2650, BTR Stage2, NW103, BG, 14% lower, 90mm upper, ARH 2" Long system w/no cats, SW Legend mufflers. **807hp/762tq on 93 gas** and **848hp/792tq on e47**
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