So2fast5u

I am wandering if anybody runs power valves in there carbs? I have never ran one in my racecars but I do have one on my 355 sbc. It runs just fine I'm just curious if anybody uses them!!

MILD THUNDER

iTrader: (3)

Yes, most marine carbs will have power valves. Even mercury used them in their holley carbs.

Griff

Run a PV in the primary and not in the secondary. That is the way Merc did the HP500 carbs also.

carrera1

I used pvs in both primary and secondary in my dominator, and made it run perfect throughout the power range. without them the carb is way to rich everywhere but WOT. I only used one on my Demon blow through. every carb is different and takes alot of messing around to get them right. But I recommend using a pv unless it only idle or wide open aka race car.

ezstriper

I agree, run a primary, plug the secondary...

So2fast5u

Guess I will leave it. It runs fine just was curious as to what others were doing. Thanks

ThisIsLivin

I'm running both in my Pro-Systems 950. It helps fuel economy when your not on it big time. My cruise speed is 55 - 60 and I get almost 3mpg with a 90+ top end. Once I get the prop sorted out I may break 3mpg. Not bad for a Velocity 280.