02-11-2008, 11:12 AM
Join Date: Oct 2007
Location: Louisville, KY
Total Cats: 0
False Knock at what RPM?
I spent most of Saturday on the dyno and one of the hardest things to deal with was the false knocks showing up through the knocksense LED. It was really unnerving to see that blue light and stay into the throttle.
We had 2 widebands running...one in the header, one in the tailpipe. AFRs were in control. I had a set of det cans on while tuning, and no prevalent knock was present. But it was really hard to tell with all the blower noise.
The knocksense LED was lit up like a Christmas tree around 5k rpms. After analysing the datalog numerous times, we determined that it was just noise, be it valve train or blower.
I have a 2000 engine so I have solid lifters. Has anybody else running a 99-00 engine determined where engine noise prevails as knock?
I plan on inducing knock at a low rpm/kpa range and setting the sensitivity of the knocksense to the point where it just sees that knock. I don't know if that will clear out the false knock up top, but it's a starting point.
I like the idea of the knock LED, but if it becomes something that I see all the time, the warning aspect of it becomes worthless.
If the sensitivity adjustment doesn't work, I have thought of installing a window switch that basically turns off the knocksense at a given RPM.