Went out to try to eliminate some strange knock at 5000rpm or so. I've tried everything from taking out fuel, adding fuel, lowering timing, raising timing. No avail. Knock still remains and I'm starting to get frustrated.

This is kind of where I left off. I was in the middle of giving it more fuel everywhere and trying to lower the timing around peak-torque. Any ideas?


Timing map.


Fuel map.

Attached is a 4th gear pull.
http://putstuff.putfile.com/72100/8637968


Any help is GREATLY appreciated. I'm still kinda new at this.

 

Around 4.5kish rpm I'm getting 1-3 counts of knock with a timing of 8-8-7-8-8...on the majority of my datalogs. The drop of one degree of timing (to 7) when I get the knock in that 4.5k rpm point.

Are you having the same problem? How much knock are you getting?

 

Too much of a Jump from 6* - 10*. at the 5k range. Waht gas are you using.

 

92.

 

can't tell from your screen shots where 5k RPM is.

As already suggested though, I would smooth out your transitions between load cells. Try not to have so much of a jump between them, even if it means taking a couple of degrees of timing out to smooth the curve a little bit.

 

Thanks for all the input, guys! I'll change it a little and make a few more pulls later. How's this look?

 

Bad, at 5500 RPM you go from 3 to 9* between 240-220, thats you knock right there.

 

Took your advice, AlwaysinBoost, and smoothed everything out on that side. Now there is minimal knock throughout the log! Thanks a bunch, guys!

 

Good deal.
there is a smoothing feature in ECUFlash that will average cells either horizontally or vertically, Ctrl-V & Ctrl-H I believe is what you hit. I used that very often.

 

OHEMGEE, block tuning!!11!eleven

As Always said, large jumps in timing can and will result in knock counts. You really shouldn't have any jumps larger than 2-3 deg.