scotty230

i have mech secondayrs and i took out the powervavel and it still stumbles

FB II

how many jet sizes did you go up when you removed the powervalve? cause that makes it reaaaally lean.

smurfy RX3

Try the part I mentioned previously, it completely eliminated my bog. Now I can just carpet the accelarator pedal w/ no bog at all.

scotty230

hey smurfy i have mechincal secondars not vacuum and and fb i have went all the way up to 68 primary and it still bogs when i stomp on it or should i go highter i got a complete jet kit from 64 to 90

tacoboy1503

iTrader: (1)

i know its been a very long time but did you ever get anywhere on this ?

84stock

iTrader: (5)

Sounds like he should have increased the accelerator pump nozzle instead. I tuned a holley 750hp for a 383 stroker and after fine tuning the jetting, power valve, accel pump cams and nozzles you could pound the throttle at any point and it would rip.