Twin Turbo 16 Camaro WOT Knock Retard

[Redline MS]

Higgs, the maf is enabled above 4000hz. In the log you will see that wot runs between 8000hz and 11000hz. The car has a very turbulent maf reading and will not idle and control light part throttle on maf. If you look at the maf tavle you will see i have it flatlined down low in an attempt to make it idle. It worked perfectly, but light part throttle is no good with maf swings of up to 2000hz. My only choice was to fail the maf below 4000hz so that idle and light part throttle would rely solely on the VVE. That part of the tune is working perfectly. The problem is only in WOT and only in boost. At that point the maf is fully functional and pretty well dialed in for the dual nozzle meth setup.

Jg, after doing a lot of reading I found several posts by guys that I would trust and have a good track record for solid information stating that too low of timing coupled with too rich of a mixture can cause kr. I had a starting point of 10*. It was pulling 10* out in boost. I was simply thing to limit that low timing. If you will look at the attached files you will see that i am already logging all of those things. I know exactly when and where the knock is coming in. The problem is that i cant locate the source. It has been the same since i started.

For starters fix the MAF issue....If its a turbo car there should be no issue in locating the MAF in a good run of pipe. Secondly....how do you know its detonating? Because the over sensitive microphones on the side of the block are saying so?

Thirdly.....these cars never run in "MAF only"......you really should be fixing the Air Per Cylinder model (SD) or you will have all kinds of issues with this. Take a look at the VVE over 105 KPA.....

[WongBob]

The car is in SD and doing great. Customer did not want to fix the maf issue if we could get away with it.

[mbray01]

The car is in SD and doing great. Customer did not want to fix the maf issue if we could get away with it.

so customer spends the money for turbos, but only wants the car to work kinda right. Honestly in my experience it takes less time to tune the car correctly, with proper components, or in this instance properly placed components, then trying to tune around them and hope they stay happy.

[mbray01]

so back to your initial question, yes knock sensors are overly sensative, however are you tuning it on a dyno, or at the track. Because if you don't have real world repeatable tests, with consistent variables then you really have no way of knowing if your hurting the motor.

[WongBob]

Street tuning. He will be changing the charge pipe at some point, but wanted to get it going if possible. Its done, correct, and safe for a CLSD 6th gen. Thats all that matters to me. Thanks for the help guys.