what size carb for a 416 stroker
I talked to Holley. I picked up a small power valve than came with my carb. I think they advised I go from a 7 to a 5? Have not installed it yet.
That is exactly *** BACKWARDS and piss on Holley for telling you that idiotic crap.
If you are fat at idle, you can open the idle air bleed up (this is why any carb without changeable brass is worthless) or you can make the idle feed restriction smaller, or both if you need to.
You set your cruise air/fuel ratio on the primary main jets and you set your wide open throttle air/fuel ratio with the power valve channel restrictors. Those are the holes behind the power valve.
You set power valve timing (opening point) using cruise vacuum and NOT IDLE vacuum. This is wrong, has always been wrong and will always be wrong and is one of the major reasons guys with a Holley or Holley clone can't get the tune up correct.
FABO member 12many has a thread on this forum (I think this forum...it could be another forum...maybe someone can find that thread and link it here) where he correctly set his power valve timing and then fixed the rest of his tune up and had exellent results. That thread SHOULD be a sticky.
I'd fix what you have if you can. Brass and drill bits are cheaper than a carb, and whatever carb you buy, unless you buy a custom tuned carb will need the same things done to it.
Shame on Holley for telling their customers ignorant tuning advice. Shame on all the authors who propagate this crap.
And yes, I get a case of the *** every time is see guys having issues like this. It's just dumb that Holley and the idiot book writers won't admit their mistakes and correct them. Pisses me off.
