Holley 2bbl carbs info

[65-coupe]

For the guys running a 500CFM 2bbl Holley what size jets and power valve are you running. Getting ready to rebuild one for my ALum head.

Thanks Brian

 

[JackFish]

viewtopic.php?f=1&t=29740

 

[FalconSedanDelivery]

I would start with Stock Jetting ( usually around 72 ) and use a powervalve that is 2 numbers above the idle vacuum ( in gear if its a automatic ) , always err on the rich side to start

 

[wsa111]

Brian, I would start with 71 main jets & .031 accelerator pump & power valve @ 8.5 only if your idle vacuum is at least 10"
You really need metering block mods such as idle orifice size & PVCR orifice.
Aim for 14.7 cruise & 12.8-13.1 WOT & low speed transfer cruise 13.25-13.7 for better mileage & smooth operation. Bill