Been fighting this knock for a few days, in certain cells in the, not sure how to counter it. Sometimes the knock is random, other times the higher rpms. I don't really thing the timing is aggressive at all.
any suggestions? any help works.
(A/F displayed is off LM2 wideband not configured )
C5 Vette
FAST90/90
TR224 114
ARH LTS
Ported 243's
91 octane
Last edited by Soul Per4mance; 01-18-2012 at 09:44 AM.
Just an LS1 powered vehicle.
What was the A/F when the knock was picked up? The O2 reading is over 1000 mv which is likely really rich.
1997 Trans Am WS6 - LS1 swap - TR224 - Pacesetter Longtubes - Yank SS3600
- 3.42 Moser 12 bolt - Wilwood Brakes - HP Tuners tuned - P1SC-1 Procharger
The a/f on the wideband is inaccurate. It's an. Lm2, despite all of the Excel spreadsheets, grounding to battery, chassis and voltage offsets, we still cant get it to read accurate. So we can't can't count on that.
Based on the 02 voltage displayed as 1000 mv, could that be the cause of the knock? I was thinking the richness would cause it to be on the safe side. Around 84kpas at 4400 rpms is where the knock starts. Timing was previously around 26. And I've lowered it to about 22ish and still pick it up......anything less and i assume it would be a dog.
Just an LS1 powered vehicle.
You need a wideband you can trust before you can finish tuning it then worry about knock if there is any
1997 Trans Am WS6 - LS1 swap - TR224 - Pacesetter Longtubes - Yank SS3600
- 3.42 Moser 12 bolt - Wilwood Brakes - HP Tuners tuned - P1SC-1 Procharger
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