sevanseriesta

iTrader: (34)

Also the car is stock so I do not think that I am getting valvetrain noise. Where would I go to see what the knock sensors sensitivty is set at, and What should it be? The thing Runs like 40 to 42 degrees timing at idle is this normal or to high

sevanseriesta

iTrader: (34)

Ok here is what I am looking at:

Crusing: at 55mph running a consistant 37 degrees advance. Part Throttle and at 1428 starts to get 1(.7) degree of knock and it immediatly knocks the advance to 13 it starts to falls to .1 KR by 2573, and the advance goes to 25*.

Then She gives it more gas and at 4099rpms It gets 1* KR and knocks the Advance to 21 from 25. As she climbs Rpms by 4850 KR goes to .04 and knock climbs to 22.5. Still in it now gets 2.7* KR and knocks the Advance to 20. The Kr again lowers to 1.6 at 5867 and advance goes to 24. Car shifts and she lets out she is at 98MPH and then cruises at 95 to 93 and there is no KR and timing is at 34* at 2342RPMS.

Then it looks like she lets of the gas all the way and timing goes to 3* and there is no KR. Then she gets to 80 and gives it gas but not to accelerate and timing goes to 41* and no knock, at 2066 rpms as she holds steady at 79 to 82 the Advance lowers to 25* and no knock. and as she goes from 82 to 88MPH and 2266RPMs Advance goes to 28 to 30 then to 28. Then she lets her foot off the gas completely again and the Advance goes to 41*

If anyone wants me to send them the log to look at it send me your e-mail address and I will send it to you so you can look at it.

sevanseriesta

iTrader: (34)

All KR comes in between .60 and .76 I am not sure what the other side of the histogram is measureing I know the top is RPM.

Camaro ChriSS

Its not unusual to find KR at that point, 4400 rpm, as it is peak TQ. I had (and still occassionally have) that problem in my set up, and actually have not been able to pin it down (assuming my valvetrain, etc...). I my case I have toned down the timing in that area of the HO table and increased the decay vs rpm table so that when the KR occurs, the pcm removes it at a very fast rate (unless it detects it again) - otherwsie the KR lingers fom 4400 rpm, all the way up to 6000, dropping very slowly.

I'm guessing your issue is too much timing at 4400-4800 rpm. The stock tune has a valley at that point dropping the timing to 23 degrees or so before climbing to 28. If you have raised the timing at the peak torque, that may be too much for the car. Some cars get away with it, some don't.

RedHardSupra

iTrader: (1)

at peak toruqe (aka peak cylinder pressure) you might wanna do a little 'safety bump'. richen up the mix a bit, and pull a little timing. if you look at stock z06 bin, you'll see they do that too. it's a good little trick

sevanseriesta

iTrader: (34)

So where would I go to do that which tables in general. Also should I copy the high octane table to the low octane table even while trying to remove KR

Camaro ChriSS

In your case, you have KR both WOT and part throttle, if I understand you right. If so, that's odd considering the stock car. The part throttle would seem to be Burst Knock occurring, which is usually an airflow issue (too much of a change) causing KR.