Percy screw holley Jet adjuster plate - Hot Rod Forum : Hotrodders Bulletin Board
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Old 06-24-2010, 11:36 PM
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Percy screw holley Jet adjuster plate

Anyone use the Percy jet Adjustment plate for holley carbs? Allows for increase or decrease of holley jet orafice size by the turn of a external screw.

Do you use it only on the primary side? Is it good?

Seems like a good idea. No fuel mess, changing jets on the fly.

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Old 06-28-2010, 09:37 PM
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I still have a set of those I used on a carb (both ends)on my dragster, they worked fine car ran as good with those as with my AED carb. And they are easy to adjust

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Originally Posted by spinn
Anyone use the Percy jet Adjustment plate for holley carbs? Allows for increase or decrease of holley jet orafice size by the turn of a external screw.

Do you use it only on the primary side? Is it good?

Seems like a good idea. No fuel mess, changing jets on the fly.
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