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11-01-2010, 09:58 PM
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#1 |
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Registered User
Join Date: Jan 2007
Location: Whitehorse, Yukon, Canada
Posts: 162
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fuel pressure
Fresh break-in on a 283 with mild cam and intake, 500 c.f.m. edelbrock carb requiring no more than 6.0 p.s.i. The fuel pressure from the pump is registering 9 p.s.i. Is this going to cause flooding or excessive fuel to intake? Symptoms are surging r.p.m. up and down on idle
Plugs are black as coal no matter what my timing is at. 
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"gotta love something that works without a computer" |
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11-01-2010, 10:21 PM
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#2 |
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*************
 
Join Date: Apr 2005
Location: Pensacola, FL
Posts: 17,843
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Re: fuel pressure
You need to install an inline pressure regulator. Don't take a chance of washing down the inside of your cylinders with gasoline and ruining your new motor.
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Rob - https://www.instagram.com/hart_rod_c10 As Iron Sharpens Iron, So One Man Sharpens Another. Proverbs 27:17 FOR SALE: DBW pedal bracket - http://67-72chevytrucks.com/vboard/s...d.php?t=651123 FOR SALE: Hood Brackets http://67-72chevytrucks.com/vboard/s...d.php?t=679945 1987 Silverado SWB - 34.5K original miles http://67-72chevytrucks.com/vboard/s...d.php?t=801834 1969 SuperBurb - http://67-72chevytrucks.com/vboard/s...d.php?t=200387 1968 Farm truck - http://67-72chevytrucks.com/vboard/s...d.php?t=358692 1968 SWB - http://67-72chevytrucks.com/vboard/s...d.php?t=551258 1948 Chevy - http://67-72chevytrucks.com/vboard/s...=122164&page=3 |
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11-02-2010, 10:48 AM
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#3 |
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Registered User
Join Date: Jan 2010
Location: Ceresco,Ne
Posts: 58
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Re: fuel pressure
Yes it will! as said regulate the fuel to 4to5 lbs max that way it will run when the needle seats in and still hold off the pressure.Also watch the edelbrock float level and always check for leaking floats.There is alot of leaking floats out there at least one of the two floats in the last 5 edelbrock carbs ive rebuilt have had a leaking float. This information is all pertaining to the afb style edelbrock not the quadrajet style.
Last edited by man-a-fre; 11-02-2010 at 02:23 PM. |
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11-02-2010, 11:28 AM
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#4 |
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Registered User
Join Date: Jan 2007
Location: Whitehorse, Yukon, Canada
Posts: 162
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Re: fuel pressure
any recommendations on a moderately priced fuel reg. does it need to be adjustable?
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"gotta love something that works without a computer" |
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11-02-2010, 12:45 PM
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#5 |
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Registered User
Join Date: May 2006
Location: Wyman, Kentucky
Posts: 403
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Re: fuel pressure
Buy an Edelbrock fuel pump they're already regulated for their Carburetors.
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1972 GMC Jimmy, 4WD, 454 CI, 350 Turbo, 4" lift, 35" tires The math teacher said my son "Bubba" could be a mathmatical genius. cause he's got 13 fingers! |
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11-02-2010, 02:18 PM
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#6 |
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Registered User
Join Date: Jan 2010
Location: Ceresco,Ne
Posts: 58
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Re: fuel pressure
I have a speedway motors regulator part 720-5857 adjusted at 4 lbs.has worked well but i'm sure the holley regulator part 427-12803 is a much better regulator for the long haul.
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11-02-2010, 05:45 PM
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#7 |
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Registered User
Join Date: Dec 2008
Location: Lawrenceville GA
Posts: 64
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Re: fuel pressure
Insert paper filter between pump and carb, that lowered mine.
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