More dumb knock...
Apr 23, 2007, 06:02 PM
#1
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More dumb knock...
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.
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.
Last edited by SaxGopher; Apr 23, 2007 at 08:17 PM.
Apr 23, 2007, 09:51 PM
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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?
Are you having the same problem? How much knock are you getting?
Apr 24, 2007, 01:48 PM
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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.
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.
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Apr 25, 2007, 06:38 AM
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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.
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.
Apr 25, 2007, 08:36 AM
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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.
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.
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