Need some LS1 Edit Tuning Help
06-29-2005, 06:17 PM
#1
FormerVendor
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Need some LS1 Edit Tuning Help Hi Everyone,
I have been trying fo a week now to try and get rid of a knock problem I have. Basically, between shifts (lift throttle), I get high LTFT's and the PCM for a moment adds back a lot of timing from the part throttle portion of the table. When I go back to WOT in the next gear, I pick up knock retard (5-6 degrees) which slowly goes away (ie..not picking up more knock) but is not gone before the next shift and the same thing happens again.
I have fooled around with the High/Low Octane tables to remove timing at part throttle points but then the car feels like a dog at part throttle. I have tried to play with the VE table but it seems to drastically affect fueling. Other than at the shifts, my LTFT's are zero at WOT.
A question too, does the BASE Spark table come into play when you lift the throttle for a shift (ie. the throttle is closed). If so, I may need to reduce timing in that table as well.
Any ideas or suggestions?
Thanks!
I have been trying fo a week now to try and get rid of a knock problem I have. Basically, between shifts (lift throttle), I get high LTFT's and the PCM for a moment adds back a lot of timing from the part throttle portion of the table. When I go back to WOT in the next gear, I pick up knock retard (5-6 degrees) which slowly goes away (ie..not picking up more knock) but is not gone before the next shift and the same thing happens again.
I have fooled around with the High/Low Octane tables to remove timing at part throttle points but then the car feels like a dog at part throttle. I have tried to play with the VE table but it seems to drastically affect fueling. Other than at the shifts, my LTFT's are zero at WOT.
A question too, does the BASE Spark table come into play when you lift the throttle for a shift (ie. the throttle is closed). If so, I may need to reduce timing in that table as well.
Any ideas or suggestions?
Thanks!
06-30-2005, 09:33 AM
#3
Staging Lane
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Originally Posted by Fast Toys Performance Parts
Hi Everyone,
I have been trying fo a week now to try and get rid of a knock problem I have. Basically, between shifts (lift throttle), I get high LTFT's and the PCM for a moment adds back a lot of timing from the part throttle portion of the table. When I go back to WOT in the next gear, I pick up knock retard (5-6 degrees) which slowly goes away (ie..not picking up more knock) but is not gone before the next shift and the same thing happens again.
I have fooled around with the High/Low Octane tables to remove timing at part throttle points but then the car feels like a dog at part throttle. I have tried to play with the VE table but it seems to drastically affect fueling. Other than at the shifts, my LTFT's are zero at WOT.
A question too, does the BASE Spark table come into play when you lift the throttle for a shift (ie. the throttle is closed). If so, I may need to reduce timing in that table as well.
Any ideas or suggestions?
Thanks!
I have been trying fo a week now to try and get rid of a knock problem I have. Basically, between shifts (lift throttle), I get high LTFT's and the PCM for a moment adds back a lot of timing from the part throttle portion of the table. When I go back to WOT in the next gear, I pick up knock retard (5-6 degrees) which slowly goes away (ie..not picking up more knock) but is not gone before the next shift and the same thing happens again.
I have fooled around with the High/Low Octane tables to remove timing at part throttle points but then the car feels like a dog at part throttle. I have tried to play with the VE table but it seems to drastically affect fueling. Other than at the shifts, my LTFT's are zero at WOT.
A question too, does the BASE Spark table come into play when you lift the throttle for a shift (ie. the throttle is closed). If so, I may need to reduce timing in that table as well.
Any ideas or suggestions?
Thanks!
06-30-2005, 10:23 AM
#4
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Look at deceleration fuel cutoff (DFCO) and search for
what others have done to massage it or kill it; I don't
have any experience messing with it on my A4 car
since I never lift throttle when accelerating. But this
"feature" seems to be the root of the high trims and
some lean-aftertaste type KR for some folks.
what others have done to massage it or kill it; I don't
have any experience messing with it on my A4 car
since I never lift throttle when accelerating. But this
"feature" seems to be the root of the high trims and
some lean-aftertaste type KR for some folks.