740 Turbo Brick

iTrader: (2)

After having my car on a Dyno and not even being able to do a full pull because of it going 10.0 rich and misfiring, I decided to turn Lean spool off and retune. In trying to tune it I have found I cant get 3rd gear to be knock free. Ill drive the car a bit to get air flowing, slow down to 2500 in 3rd, start the log, go WOT and Ill immediately get a flashing CEL and see up to 13 counts of knock during spool up, and at least 6 the full rev range. Obviously I cant adjust anything like this. But ANY other gear, including a low 1st thru 4th WOT no lifting, I get ZERO knock. Should I just take 5 degrees out of the whole Rev range and start over? Its even in my logs that 100 load 2700 RPM is showing 3-6 counts....Not even in boost yet.

Stock block, Kelford 272s, Evo 9/20G at 26 psi, 3" turbo back, Injen piping, AMS IC, Denso 720s, 13.0-12.5 during spool up, 11.5 full boost, 11.0 at redline

SharkyPR

iTrader: (1)

In some cars mods as CAMS can trigger phantom knocks due to the extra noise they might produce.
Reducing a bit the sensitivity of the Knock sensor is a workaround for this.

740 Turbo Brick

iTrader: (2)

That's actually interesting because I had BC272s before the Kelfords, and I had no problems with knock before. I didn't know if it was because there was more air being taken in from the new cams or just noise

740 Turbo Brick

iTrader: (2)

So I adjusted my knock multiplier for low RPM and the knock went away. Thanks to The post in the screen shot I took.