Hey guys. working on a stock 5.3 with a 4l60e in an old 68 c10. trucks runs awesome, but i have spark knock from about 3000-4000 rpm then goes away. Tried a couple things to get rid of it but can't seem to shake it. Also the truck was falling on it face when shifting from 1st-2nd. Any help would be greatly appreciated.
Any logs?
Nothing rubbing on anything? Solid motor mounts or rubber mounts?
Is is all knock retard or is some of it burst knock?
2016 Silverado CCSB 5.3/6L80e, not as slow but still heavy.
If you don't post your tune and logs when you have questions you aren't helping yourself.
Seems to be a lot of advance in the lower load areas...
99 TA, Texas Speed LS376, PRC heads, 233/239 cam, Fast 92mm, 95mm TB, card style MAF, Tick TR6060, Strange 4.11 12 bolt axle & clutchpack diff, Strano springs/dampers, Vette 18" wheels, Vette disks, CTS-V calipers, 16lb flywheel, long tube headers, no cats.
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