Hello all,
I have almost always read and received good advice and tips on this forum.
But have not had the need to ask many questions or the need for advice, until now.
Currently doing VE tuning but reoccurring no matter what.
2003 C5 Corvette Z06, 6 speed
406 LS3, CNC built block, AFR 230 Mongoose heads, about 11.3 to 1 compression
FAST intake, Ported 90mm TB, Comp Cam, 615 lift intake and exhaust, 242-250 duration
2110 Johnson lifters with Manton pushrods. Currently with Volvo injectors 9186340.
Situation: Have had the same "problem" with 2 different engines, formerly with 392ci, 3 different cams, 2 smaller ones with less overlap.
At cruise, part throttle, between 11% to maybe 16% registered, there is a fast surge or stutter. It might show up in the attached log.
Around 1500 or so rpm's. The rpm's jump up 100 to 200, immediately, without warning, and will not go away without modulating the pedal.
No air leaks, as I have checked various ways, intake off, air cleaner assembly apart and reinstalled a few times. Smoke test, carb cleaner, ect....
Have had same situation with different injectors, also.
TB, TAC, Pedal problem??
I still consider myself a newbie, especially with the newest version of HP Tuners.
Any comments or suggestions greatly appreciated.