Is this phantom knock?! ...Driving me nuts!
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Is this phantom knock?! ...Driving me nuts!
Hey guys,
I have been having a lot of issues tuning car recently. I just went to speed density and seem to have that calibrating near-perfect. The fuel trims look good, and the car drives great!
The issue I am having is that under 250-260ish load anywhere from 5100-6000RPMs, the car starts picking up knock. My AFRs are good, and timing seems to be ok, so I don't know what the issue is. A little info about my setup:
Buschur 2.1L 10:1 motor, BS delete, with fully built head, GSC S2 cams, hand-ported (not flow-benched), Torque Solutions solid mounts throughout, Full-Race T3 manifold, HTA3582R Turbo, Buschur double-pumper, and PTE 1200cc injectors.
No matter what I do with the timing, I can't get the car to stop knocking, and my AFR's seem too good to be the issue. Is my engine just noisy? I'm tuning on 93 oct BTW.
I have attached a few logs as well as my timing map.
Thanks!
I have been having a lot of issues tuning car recently. I just went to speed density and seem to have that calibrating near-perfect. The fuel trims look good, and the car drives great!
The issue I am having is that under 250-260ish load anywhere from 5100-6000RPMs, the car starts picking up knock. My AFRs are good, and timing seems to be ok, so I don't know what the issue is. A little info about my setup:
Buschur 2.1L 10:1 motor, BS delete, with fully built head, GSC S2 cams, hand-ported (not flow-benched), Torque Solutions solid mounts throughout, Full-Race T3 manifold, HTA3582R Turbo, Buschur double-pumper, and PTE 1200cc injectors.
No matter what I do with the timing, I can't get the car to stop knocking, and my AFR's seem too good to be the issue. Is my engine just noisy? I'm tuning on 93 oct BTW.
I have attached a few logs as well as my timing map.
Thanks!
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I think it's running 26-14.5= 11.5psi at that point, wouldn't it? It's a SD setup with OMNI 4-bar, GM AIT. Maybe I've been reading the boost wrong. My Defi gauge is way off too if that's the case. :x
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Ok, so I double-checked everything, and I have my OMNI configured correctly in my ROM. I didn't however change the formula in Evoscan for logging boost though!!! *dumb me...
I just updated the formula. The car, according to my Defi gauge is running about 17psi.
The reason my timing is so high is because when I started low, the car was knocking like a bastard! I gradually increased the timing, and this is where my car has been best-case-scenario. Only issue is: IT'S STILL KNOCKING!
Aaron, I tried the map you sent me, but had no luck... Also tried lowering my timing again, and it knocked even quicker...
I just updated the formula. The car, according to my Defi gauge is running about 17psi.
The reason my timing is so high is because when I started low, the car was knocking like a bastard! I gradually increased the timing, and this is where my car has been best-case-scenario. Only issue is: IT'S STILL KNOCKING!
Aaron, I tried the map you sent me, but had no luck... Also tried lowering my timing again, and it knocked even quicker...
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How long have you had your solid mounts? My car was able to be beat on prior to me building it and adding the Avid solid mounts. Now that I have no balance shafts, a built motor, and solid mounts I cant seem to get rid of knock around 3800-4500 regardless of what is done to timing, afr's, mivec, etc. Does your car vibrate rather badly around the rpms its knocking?
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How long have you had your solid mounts? My car was able to be beat on prior to me building it and adding the Avid solid mounts. Now that I have no balance shafts, a built motor, and solid mounts I cant seem to get rid of knock around 3800-4500 regardless of what is done to timing, afr's, mivec, etc. Does your car vibrate rather badly around the rpms its knocking?
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Just wondering because Im also trying to narrow my knock issues down. Mine happen during the moment of motor vibration though. I hope its something simple with your tune and you get it all worked out man. Good luck.