08-09-2008, 11:02 AM
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Half-Ass Member
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Join Date: Jun 2005
Cobra Make, Engine: ERA #732, 428FE (447 CID), TKO600, Solid Flat Tappet Cam, Tons of Aluminum
Posts: 22,025
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Quote:
Originally Posted by For Paw
I just installed a Holley Liquid Fuel Pressure gage at the end of the fuel log after the second carb. Only getting (reading) 2lbs. Having a hard time getting the engine to idle. Using a Holley mechanical pump. Is this too low and is it time I installed an electric pump?
427SO, dual holley 1850 (600cfm ea, vac sec.).
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You can not rely on the readings of a liquid filled fuel pressure gauge under the hood until you learn how it reacts to the heat changes. Check your pressure when the car first starts after it has been sitting over night, then compare that to what it reads after you've been driving it a while, you'll learn how the heat affects the pressure inside the gauge and gives you false readings. Then you'll learn how to spot changes in your pressure, but only because you've learned how your gauge works with your engine and the ambient temperatures, not because you can rely on the readings themselves. |
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