mikehalek Posted September 2, 2010 Report Posted September 2, 2010 I have a 6volt electric fuel pump that will be going on the 48 P15. It will be used with the regular fuel pump on a intermittant basis. It runs 6 PSI. Is this too much pressure? IF so, how do I compensate for it? Thanks Mike Quote
Powerhouse Posted September 2, 2010 Report Posted September 2, 2010 (edited) I have a carter rotary vane type 6v pump and it is supposed to put out 6 psi...as far as my inline fuel pressure gauge(mr gasket)tells me its only putting out 2 psi. I am in the process of figuring out what the heck is the reason. ANyway, if you have the dual carter webers, you can put an inline pressure regulator...and set it at 3 to 3.5. They cost about $30 from Mr Gasket. see greg g's post below for stock Edited September 2, 2010 by Powerhouse Quote
greg g Posted September 2, 2010 Report Posted September 2, 2010 Stock pumps run 4 to 7 so 6 should not be a problem. Quote
190bearplace Posted September 2, 2010 Report Posted September 2, 2010 FWIW-We just key the electric pump and let it run as a supply pump on all that we install. It is hard on the mechanical pump to pull through the restriction of an electric pump. Quote
desoto1939 Posted September 2, 2010 Report Posted September 2, 2010 I have had a electric fuel pump on my 39 Desoto for over 15 years along witht he mechanical AC588 fuel pump. I only runthe electric pump as a priming pump or incase the car had a vapor lock or the mechancial pump failed. I have never had a problem and use my car alot. The mechanical pump is not putting any strain on the electric pump. Rich Hartung Desoto1939@aol.com Quote
fedoragent Posted October 3, 2010 Report Posted October 3, 2010 Out of curiosity, going over the stock 4 - 7 PSI would be bad? I've had some pumps in the past on other cars run 10-15 PSI. Would that be terrible for P15s? I'm just wondering. FG. Quote
Don Coatney Posted October 3, 2010 Report Posted October 3, 2010 FWIW-We just key the electric pump and let it run as a supply pump on all that we install. It is hard on the mechanical pump to pull through the restriction of an electric pump. How do you measure that it is hard on a mechanical pump to pull through the restriction of an electrical pump? Quote
Don Coatney Posted October 3, 2010 Report Posted October 3, 2010 I have a carter rotary vane type 6v pump and it is supposed to put out 6 psi...as far as my inline fuel pressure gauge(mr gasket)tells me its only putting out 2 psi. I am in the process of figuring out what the heck is the reason. ANyway, if you have the dual carter webers, you can put an inline pressure regulator...and set it at 3 to 3.5. They cost about $30 from Mr Gasket.see greg g's post below for stock When the float valve closes in your carberator you should see a pressure increase in your fuel pressure gauge. Should be easy to check this if you run the pump with the engine not running. Quote
rustyzman Posted October 5, 2010 Report Posted October 5, 2010 The risk with a higher pressure is that the pump will overcome the float's ability to keep the needle closed and you will flood fuel out of the carb. Quote
fedoragent Posted October 7, 2010 Report Posted October 7, 2010 The risk with a higher pressure is that the pump will overcome the float's ability to keep the needle closed and you will flood fuel out of the carb. Thanks. FG. Quote
fedoragent Posted October 17, 2010 Report Posted October 17, 2010 Folks, The Fuel Pressure regulator that I have is crapola. Can someone suggest a regulator that they have used with some success? Thanks, FG. Quote
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