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Author Topic: High Knock Retard right before the rev limit  (Read 3275 times)
markus2900
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« on: September 23, 2025, 12:33:08 PM »

Hello guys i'm coming with a question about knock retard. I don't know if this is bad or intended to happen but my knock retard is always 0 no matter how rough i drive but when i hit 5200-6500 RPM at WOT i start to get knock retard of almost 12° ! .

I don't know if this is because the rev limiter of the car was moved from 5500 to 6700. Would this be the cause?

Some ignition maps were altered, fuel maps were altered due to bigger injector install and lambda maps. That's it. But when i checked my logs i noticed this knock even when my car was stock.
On my stock logs the car had almost 9° at 5000rpm.
I use premium gas in the car.. but the car calls for 95 octane. Maybe it's some thing in place to help with that.

Also the car burns a little bit of oil.

I feel like all this stuff help to make the knock ret. to be higher but i don't feel it would throw suddenly 12 degrees.

I can't post any logs because they are huge files so i will post screenshots from logviewer from these moments with ME7Logger values.

Also the car is an NA engine with very sensitive knock recognition so i'm trying to get this right...  036906032G ME7.5.10
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nyet
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« Reply #1 on: September 23, 2025, 02:03:16 PM »

why would you post screenshots of numbers vs graphs?
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markus2900
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« Reply #2 on: September 24, 2025, 05:30:24 AM »

why would you post screenshots of numbers vs graphs?

Sorry, i would post the full cvs if i could..

Here is a screenshot of a 3000-6500rpm pull.

I tried to upload the whole log to google drive so heres the link: https://drive.google.com/file/d/1OR6uYOcfJCDxkdrB2A6_QFKB5IcNU0hy/view?usp=sharing It has some pulls and then a stationary revving. I only use values ME7Logger gave me. I don't have more of them.
Also my LTFT and STFT values are around -0,8 to -1 %

If anyone can help me it would be awesome. Because I think i'm hitting some limits instead of it just being bad gas or little bit of oil.... Im suspecting KFMI maps.. or KFZW maps.. but again the car had similar values on stock. Maybe it's a bad injector... I just don't know what to look for in this situation.
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aef
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« Reply #3 on: September 24, 2025, 06:37:04 AM »

i dont think anyone in here can help you with 1.4 na tuning

why do you expect the ignition to increase linear until redline?
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markus2900
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« Reply #4 on: September 24, 2025, 09:14:15 AM »

i dont think anyone in here can help you with 1.4 na tuning

why do you expect the ignition to increase linear until redline?


No no, i don't expect it.. i was just curious if it's wrong that theres such huge knock retard at redline. I'm a begginer and everyone online yells... max 3 degress max 3 !!!. So it was kind of worrying to see that. It's probably not completely harmless but i don't know if it's "wrong" or not. Like to get a worry level  Grin
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