I had to deal with a similar problem when tuning my friends 1g back in the day. Retarding timing, replaced knock sensor, adding fuel just didn't seem to rid it of the phantom knock. Wish we got around to figureing it out before he just replaced the engine. Is it possible to add a seperate knock sensor like a knocklite to see if you can narrow it down?

 

I agree with post #15, seems driveline (clutch) related.

 

try lowering the boost, give 23psi a shot with similar timing. No need to run negative timing at peak torque.

 

Ok next time I have a hold of the car I'll try that.

The car didn't like so little timing it knocked more when i gave it less. 11/12 up top are 9 numbers. This was an 8 MR.

I run the same timing on other evo's with no problems, I would have tried that If I thought otherwise.


I will look into the driveline more next time I get to look at it.

 

Are you data logging your car at all? At what load are you seeing knock counts and how many? Because if your seeing a large number of knock counts at 3psi or less then you may have a faulty knock sensor and/or something rubbing or rattling to make the sensor read that.

G/L

 

Any updates?

 

I am bringing this from the dead, but I am tuning a 2005 EVO8 and its knocking pretty bad as well, 36-45 counts, starting at 3200RPM, I tried the same file on a car with same setup and it has zero knocks, anyway the strange thing about this car is that, when it knocks, if I turn it off then back on and drive it hard from 1st gear, it drives the first 3 gears with zero knocks, when we go into 4th it starts to knock, and afterward it keeps on knocking in every gear the moment we hit boost, infact even when BOV release pressure it measure knocks. boost is pretty low at about 19psi, AFR is in the high (10.8-10.9) and timing pretty conservative.

Cheers

 

I also saw this when i installed my whiteline front engine mount,and wondered why the hole is bigger. I'm not picking up unwanted knock though.