Info if you are having problem with your Street Avenger Carb
I had problem with my Holley 670 street Avenger hesitating at low rpm, 1500-2000. Worked good at idle and past 2500 RPM, just could not get the transition circuit to work. played with it for 3 year now. Tried different power valve, raised the float, more/less timing, vacc advance, no adv, timed port vaccum/full vaccum adv, more or less transition on secondary throttle plate, leaner/rich idle adj. nothing really work. My cam shaft might be to big for that carb. spend many hrs researching on different forum, seem to be a common problem with them on modified engine. high end carb have better booster, Changeable idle feed restrictions and better metering block.
2 weeks ago I invested in a PROFORM® STREET SERIES CARBURETOR, 650 CFM, MECHANICAL SECONDARY. same Family as Quick Fuel. Look similar to a Holley HP but about 150$ cheaper. WOW what a difference! I can drive the Stang now @ 1500 RPM with no hesitation and carb perform well from idle to WOT.
Here a couple pics of it installed on my 351W.
66 coupe restomod, 351w, T5z, mustang II front end, 9 inch 3.89 gears, four link rear end and 4 disc brakes
Last edited by zr2_wolverine; 06-14-2014 at 10:40 PM.