Knock on fast shift
May 22, 2008, 06:38 AM
#16
as far as I have heard, its common with stock clutches, which I still have and suffer the same knock symptoms. I am going to also check my DP for clearance. like others have described, on 3rd or 4th gear pulls i have 0 knock. as soon as we get into shifting...it knocks about 8 counts and tapers down. I may try lowering the crossbars with another washer to add extra room and maybe wrap the DP with some heat wrap to try and quiet it down.
May 22, 2008, 12:16 PM
#17
Watch your timing values on the shift. If timing jumps more than 5º or 6º quickly it can cause knock for that reason alone. It happens often when shifting quickly or using the NLTS mod. The answer is to pull some timing in the lower load cells referenced during the shift to make the transition smoother.
May 22, 2008, 01:37 PM
#18
I've been having this problem too when using NLTS. All is fine until a shift and then knock floods the rest of the run. I pulled a couple degrees in the shift area without success.. will have to try some more. DP doesnt hit anything, using exedy twin.
May 22, 2008, 06:25 PM
#19
Well it got cleared up when working on something else. Rescaled my maps since I was overrunning them pretty badly, also turned off lean spool and retuned the fuel. When I was done I tested shifting through the gears at WOT and didn't get any knock. I also don't have that annoying AFR drop in 4th and 5th anymore.
May 22, 2008, 10:53 PM
#20
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Watch your timing values on the shift. If timing jumps more than 5º or 6º quickly it can cause knock for that reason alone. It happens often when shifting quickly or using the NLTS mod. The answer is to pull some timing in the lower load cells referenced during the shift to make the transition smoother.
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