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More strange things

Roger63

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I put a march serpentine belt kit on my 440. With this kit you have to remove the mechanical fuel pump to make room for the alternator. After switching to a 60 gph electric this happens. Under hard acceleration after going In to 2nd gear around 4500 rpm it just falls on its face like it ran out of fuel. In about 5 seconds it comes back,WTF any ideas?
Thanks
 
What else was changed on the car when the electric was added?
 
Have you checked the fuel pressure?
 
I put a march serpentine belt kit on my 440. With this kit you have to remove the mechanical fuel pump to make room for the alternator. After switching to a 60 gph electric this happens. Under hard acceleration after going In to 2nd gear around 4500 rpm it just falls on its face like it ran out of fuel. In about 5 seconds it comes back,WTF any ideas?
Thanks
As said what does the fuel pressure gauge say? Pictures of your pump and tank mounting.
 
360 HP in my supercharged UTVA 66V51 aircraft burns 62US gallons/hour at wide open throttle. How much HP are you putting out and can your 60GPH pump keep up?
 
With a mechanical pump the pressure/volume increases with rpm and the pump is about two feet from the carb so response is virtually instant. On the other hand, an electric pump is run at either: high pressure through a regulator and return line OR at a preset pressure with a relief valve. Add to this that the pump is nor about FIFTEEN feet away from the carb. If the pump is at a preset pressure and you hammer the throttle it will take a few seconds for the pressure to build up to the carb. Meanwhile you've run the carb dry.

Its a 60 gph pump ... but can the fuel line flow 60 gph ???
 
An electric Pump is capable of immediate and constant pressure if other parts of system are correct. Millions of efi cars running in similar fashion with no float bowls to buffer.
Voltage at pump and psi are critical to diagnose.
 
Pump is mounted right behind radiator support up high on inner fender well, no pressure gauge. It is installed with factory steel line from tank to pump with 3/8 fuel line approximately 3ft in length to carb. Engine makes around d 425-450 hp.
 
Assuming the pump is functioning as designed, that only leaves two areas of concern:
1. There is a restriction in the supply/tank pickup.
2. The carburetor does not like the pressure you're hitting it with/has other problems.

Was the car pulling good prior to disconnecting the mechanical pump?
 
Pump is mounted right behind radiator support up high on inner fender well, no pressure gauge. It is installed with factory steel line from tank to pump with 3/8 fuel line approximately 3ft in length to carb. Engine makes around d 425-450 hp.

Mount pump back at tank. Most all are push pumps not suck.
 
Assuming the pump is functioning as designed, that only leaves two areas of concern:
1. There is a restriction in the supply/tank pickup.
2. The carburetor does not like the pressure you're hitting it with/has other problems.

Was the car pulling good prior to disconnecting the mechanical pump?
Yes
 
My shop class teacher(many years ago) stated "Fuel pumps blow better then they suck ":lol:
 
Where you have your pump mounted GAURANTEED failure. I'm frankly surprised it runs at all.
As others have said, it needs to be at the back, by the tank, and as low as possible.
 
Where you have your pump mounted GAURANTEED failure. I'm frankly surprised it runs at all.
As others have said, it needs to be at the back, by the tank, and as low as possible.
Yep runs great till ya open it up. Oh well doing things twice is kinda my Forte. I've never used an electric fuel pump till now live and learn.
 
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