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Old 07-07-2011, 10:53 PM   #13
Duane Eiskant II
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Join Date: Dec 2001
Location: Alexandria, Va
Posts: 501
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Default Re: Fuel volume drop after regulator?

Well, I'm not a rocket scientist by any means but on my stocker with the autolite carb i use to run a black pump (Holley 150 gph) with the Mallory regulator and #8 fuel lines. I went to work for a carb shop and got a lesson in fuel systems. Put a magnafuel 300 (bypass pressure is somewhere around 40 lbs that it sends to the front), with the magnafuel regulator and #10 line from the cell right to the inlet of the carb. It was worth a solid .15 over my old system. Also i run 9 1/2 psi at the carb, i get the fuel pressure right at the needle and seat and it never changes. Made me a believer in the bigger and better pumps. On a side note, a very fast upper classed stocker (he would kill me if i let you all know just how smart he is), was having a fuel issue. He has a Mallory pump and regulator and has run his car that way since he built it. He was thinking he was running out of fuel before the finish line so i made him up a fitting and a gauge to see how much psi his pump was pushing to the regulator. His autometer fuel pressure gauge always showed he had 8 psi with his Holley carb. Well, we went to the race track, and i checked his bypass pressure it was only sending 5 psi to the front so how was his other gauge showing 8 in the car? He didn't like the way the pump "sounded" when i turned the pressure up to 25 so, we set it at 15. Still picked up about .07, but id bet theres still more et that's he is not using. You know thought, you just cant teach an old dog new tricks....Of course he's one of the types that you can't teach anything, because he knows it all...
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Duane Eiskant
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