Is your tuner local to you? If so, take the car to him. It would be much easier.

 

He's just really hard to get in touch with and at the moment he thinks it's ghost knock.

He said he will send me a new MAP with very retarded timing to check if it's really knocking.

He also claimed that the area over 12.9 psiG is "tuned" for and he just forgot to rescale the MAP, is that even possible??

I want to bring it back but I don't think he would let me unless he is convinced that it's knocking.. That being said should I request to bring it back so he can rescale the psiG and touch up the area where it's knocking? And should I be charged for it?.. It's kind of his fault for overlooking the psiG scale and the knock to begin with.

 

I'm seeing 11.5 AFR around that area

 

I wouldn't charge for it but everyone is different I suppose.

 

Ain't tuned to 16 psi. I think he went lazy and just said 12.9 is 16. But regardless IMHO I think the timing is too aggressive for pump gas. I'd drop it back 2 degrees and see what happens. Timing shouldn't dive though up top. Peak timing at peak rpm.

 

I was looking at his timing map and actually thought it looked right on the money for linear boost delivery with a supercharger. At least up to the 12.9 psi we can see. Typically we dont even start pulling timing until we see 2-3 psi and from there its generally another degree per 1 lb boost, interpolated to redline as a base starting point. His timing map is already pulling timing at 1 psi. Running 14 degrees total at 12.9 psi would theoretically put him about 11 degrees at 15psi. This tune is likely too conservative in vtec (assuming its been lowered) and possibly too aggressive in the area in question. This is entirely possible, but from first glance it looks good to me.

 

So does that mean my tuner isn't lying? It's tuned at 16psi too but he just didn't rescale it?

 

So does that mean my tuner isn't lying? It's tuned at 16psi too but he just didn't rescale it?
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I cant tell you that for certainty becuase I dont know AEM or Kpro algorithms, but on my E-manage if I go beyond the scaling parameters, what ever is in the last cell will just continue to as far as the engine goes, that goes for anything, timing, fuel etc. So if someone can verify this with this software then chances are you are technically tuned to 16psi or what ever your making. Whether or not that area is good we dont know, if your tuner says it is then it might be. Also note that with a supercharger, your peak trq (where you are most likely to detonate first) is near redline unlike a turbo which is significantly lower, in the mid range somewhere. So their timing curve will look substantially more aggressive early in the rpms vs yours. Look at your dyno graph and find the rpm that you are making max trq and start pulling timing there to redline.

 

So does that mean my tuner isn't lying? It's tuned at 16psi too but he just didn't rescale it?
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I cant tell you that for certainty becuase I dont know AEM or Kpro algorithms, but on my E-manage if I go beyond the scaling parameters, what ever is in the last cell will just continue to as far as the engine goes, that goes for anything, timing, fuel etc. So if someone can verify this with this software then chances are you are technically tuned to 16psi or what ever your making. Whether or not that area is good we dont know, if your tuner says it is then it might be. Also note that with a supercharger, your peak trq (where you are most likely to detonate first) is near redline unlike a turbo which is significantly lower, in the mid range somewhere. So their timing curve will look substantially more aggressive early in the rpms vs yours. Look at your dyno graph and find the rpm that you are making max trq and start pulling timing there to redline.
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Alright I'll look into that. Thanks!

 

aem goes to what you see. best way to prove this is pull the data from aem log that shows timing, rpm, and map load. i bet it says 12.9load and peak rpm and 14.3 degrees of timing. so even though you are going above 12.9psi, its still saying well 12.9 and up run 14.3 degrees of timing.

i would rescale the whole map to see the peak load you are going to see. then plug in all the values and pull timing and go from there. i am really surprised tuner didnt rescale for the map sensor and boost you are running.