Power Valve Selection
06-22-2009, 07:46 PM
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Car: 89 Camaro
Engine: 383 w/ 450HP
Transmission: TKO-600
Axle/Gears: 3.42
Power Valve Selection
Ok here is my carb its a holley street HP 750 double pumper.
My car has 10-11 inches at start up idle
12 inches at 180* operating temp idle.
20-22 inches crusing at 2500 rpm.
I believe it only has a power valve on the primary side, and right now its the stock 45. I know this is to low and im getting a pretty good bog when i go to wot. What size power valve would you guys say to step it up to?
My car has 10-11 inches at start up idle
12 inches at 180* operating temp idle.
20-22 inches crusing at 2500 rpm.
I believe it only has a power valve on the primary side, and right now its the stock 45. I know this is to low and im getting a pretty good bog when i go to wot. What size power valve would you guys say to step it up to?
06-24-2009, 10:47 AM
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Car: 1984 Firebird SE
Engine: 388 sbc, Brodix Track 1s
Transmission: turbo 350 transmission
Axle/Gears: 4.10 gears
Re: Power Valve Selection
I would call Holley's tech support and let them tell you what you need as far as power valve. I would think you could go with a 65. It is usually determind 50 percent of your vacuum at idle.
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