Ever since the TFS heads my car has bucked at 2000rpm also. I eventually worked it away and it was with more timing.
Ive run as much as 23 deg initial timing with 87 octane and no pings. No one can explain it.
I just had my distrubtor out for a while for some motor work. I put it back in and have yet to retime the car. But its bucking again at 2000rpm and I just set the timing by ear.
So the best conclusion I can come to is these tfs heads just love timing!?!
Skyler
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-1989 Saleen Mustang #406-
TFS TW Heads, E-303, Edelbrock intake, 70mm TB, 73mm MAF, 24lb injectors, 1 5/8 shorties, Off Road H, 3 Chamber flows, Jaz Race seats, Back seat removed, sub-frames, Roll Cage, and a 80 shot of N20.
12.54@107.4 Motor
332RWHP, 350rwtq