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Author Topic:   Rear power valve
posted June 02, 2003 01:34 AM
Holley 4150.

What difference would it make if you're not running a rear power valve? I know what a power valve does, but running more jet would supply more fuel with vacuum as well wouldn't it?

I've seen carbs with blocked off rear power valves, and my backup carb is like this, just wondering if I should change the rear metering block?

any info appreciated.. thanks!

[This message has been edited by HRT187 (edited June 02, 2003).]

posted June 02, 2003 12:18 PM
You dont have to change the metering block. Just put the dummy power valve plug in and up your jetting to compensate.

posted June 02, 2003 06:20 PM
What Im saying is am I losing anything by not having one? My carb doesn't have prvision for a power valve.

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