Thread: Needle / Seat For Holley With Lemans Bowls
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Old 12-05-2019, 04:01 PM
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FredG FredG is offline
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Join Date: Sep 2018
Location: Howell, NJ
Cobra Make, Engine: Backdraft Car #1209 Roush 427R
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Default I respectfully beg to differ.
The Holley carb that came with my 427r ran the best when brought back to factory specs. Having the wrong power valve or one that stuck open will definitely affect performance when accelerating and the vacuum drops. Open throttle is a different story but the vacuum will have to catch up to the throttle and that is where the power valve comes in till it does. Wrong jets are another issue.

Fred
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