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07-06-2012, 06:23 AM
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Holley 4 bbl 650 cfm lbs of pressure?
Hi, just a quick hello and, want to have an expert on this forum tell me if I need a fuel regulator on a Holley 650 cfm carb. It is a new plane jane 4 bbl carb that was jetted for 6000 feet cause I live in Denver. It is on a 1968 ford 429 cid in a 1952 ford f1. I would like to know what is the min and max lbs of pressure one of these carbs can handle before I need to place a regulator in the line? I am looking for an electiric fuel pump that I do not need a regulator for.
Thanks Dennis. 
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07-06-2012, 06:54 AM
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It depends on a lot, they can be used anywhere from 2 to about 10psi, stock holleys usually run best at 5 to 6 psi though.
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07-06-2012, 10:03 AM
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Im using a holley red top fuel pump,no regulator required. you will need one if you use a blue top pump though!
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07-06-2012, 12:47 PM
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Use a Carter P4070 fuel pump. No regulator is needed.
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