Well,
I just had an LS3 transplanted into my C5Z. The car was dyno tuned after the motor was built and the builder only did an idle tune. On the dyno, the motor was run in and part throttle/WOT was tuned and the engine made 468/430 at the wheels. When I got the car back, the car drove fine at cruise, however the way it behaved at traffic speeds was horrible. It bucks very hard under 1600rpm or so, above its smooth as glass, below a nightmare. I had made some attempts to clean up the VE table around that area, but its not helping too much. I need some help please
Specs are as follows: 0411PCM
-Stock LS3 bottom End
-GMPP LS3 Ported heads
-Ported 90mm LS2 throttle body
-custom grind COMP 226/238 @113+1 Cam
-KN FPIK intake for LS1/6, stock 84mm maf
-ARH 1-3/4" headers,
I am logging AFR through an Innovate LC2 WB and EGR. I have provided the math parameters that let you see the AFR logs.
Please guys any help is appreciated. I'm attaching the tune I received with the car, as well as where I got to with the airflow tuning.
Thanks
P.S. there is also a spot between 4000-5000rpm at low throttle angles where the car feels like it hits fuel cut and the AFR goes super lean.