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Old 01-10-2001, 11:15 PM   #1
Five0
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Join Date: Apr 2000
Location: middleburg, fl, usa
Posts: 1,134
Post Almost done!

I got the car back together today but I have a small problem, we left the 255lph fuel pump in the tank and used a fuel pressure regulator for a carburetor.
The problem is that it will not adjust the fuel pressure below 13 psi. I don’t know if the return line is too small or blocked or if it is something else. I will look at it some more tomorrow and see if I can get it fixed. It should work according to the shop I am talking to. What are your thoughts?

We did start the car and it does run but the pressure is too high and we did not run it long because it was getting late.

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James Cox
nochevy@hotmail.com
1991 Mustang LX
Best 1/8 time on motor 7.686 @90.20mph
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Old 01-11-2001, 11:47 AM   #2
88PONY
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Location: INDIO CA USA
Posts: 141
Post

#1 You should repace that pump for a carb. one.
#2 What regulator are you running? Mallory
makes a nice return style regulator.Most
of your carb. pumps also have a bypass on them incase you don't want to run a return
line from the reg.

I have the Mallory 250 with a sumped stock 88
tank,#-10 line to a BG nonreturn reg. I run the bypass on the pump to a bung that was welded in to the top of the tank.I've never
had a problem,and pressure is easy to set.
The regulator you have may be busting it's balls to resrict the flow.

Remember injected cars need pressure on the fuel rails,as a carb. has bowls to store its
fuel and doesn't need major pressure.
My pump flows 250 gph@20 psi yours may be
255 lph@60psi just an example.

Hope this helps... i had the same prob. only it was a stock pump.

Good Luck




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