Quote:
Originally Posted by SkinnyG
I've never heard it called an economy valve, but your understanding of how it works is reasonable.
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I think technically they called it the "economizer" valve, I tried Googling it and yup Power Valves show up.
Dave Emanuel mentions it in his Super Tuning and Modifying HOLLEY Carburetors book, great read, he is a funny guy and explains things wonderfully, highly recommend one of his books