20# Fuel Pressure drop
Thread Starter
Joined: Nov 2001
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From: Sunny San Diego
20# Fuel Pressure drop On the dyno this past weekend, watched my FP gauge drop from 58 to 40 
Walbro in the tank. 42# Injectors. Running out of fuel @ 6K.
Fuel pump problem? Or regulator?
Walbro in the tank. 42# Injectors. Running out of fuel @ 6K.
Fuel pump problem? Or regulator?
Last edited by Ed Blown Vert; May 16, 2005 at 06:59 AM.
I have the same problem my fuel pressure last week was 60psi, then after about 4 passes at the track the car droped of .6 tenths, checked fuel pressure again 40psi idle 20psi in gear at wot, the pump is a walbro 255 about 3 mo old. I'll let you know what i find on mine
I have a single bosch 255 L that has handled over 600 rwhp on the unit. Sounds like an issue with the pump. Are you running it off the stock wiring directly or through a relay? You can always run a dual intank, but it shouldn't be needed at your power level. My guess would be the pump.
Joined: Mar 2002
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From: A Racetronix dealer near you...
Originally Posted by Ed Blown Vert
Still on the stock wiring. I have a Racetronix ready to go in. Guess I will try that first. Thanks.
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Please support a Racetronix dealer near you for personalized service.
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Verdad Gallardo I ran a totally seperate in-line system from SpeedInc. Billet adjustable regulator, new injector rails, external pump, braided lines, etc. New tank and everything. You can use your stock tank but you have to drill it for the feed and return lines. Some people run their braided return line back and clamp it to the factory return pipe up on top of the tank. You will have to remove the in-tank regulator however. Call Tom at Speed Inc....
Well i pulled my fuel pump today to install my new racetronix fuel system. It turns out that my 20psi drop was from the rubber hose they give you to connect the fuel pump to the sender had a split in it about 2" long, But i replaced the the whole set up with the racetronix its a much better system than the walbro 255 universal pump I just wish i would have spent the extra money the first time
Thread Starter
Joined: Nov 2001
Posts: 3,066
Likes: 0
From: Sunny San Diego
Originally Posted by ChevPower
Well i pulled my fuel pump today to install my new racetronix fuel system. It turns out that my 20psi drop was from the rubber hose they give you to connect the fuel pump to the sender had a split in it about 2" long, But i replaced the the whole set up with the racetronix its a much better system than the walbro 255 universal pump I just wish i would have spent the extra money the first time
Joined: Mar 2002
Posts: 2,032
Likes: 26
From: A Racetronix dealer near you...
Originally Posted by Ed Blown Vert
What is everyone using for a regulator? I have been waiting for the Racetronix version.
__________________
Manufacturer / Distributor of Automotive Fuel Systems, Components & Electronics
Please support a Racetronix dealer near you for personalized service.
>WEB SITE<
Manufacturer / Distributor of Automotive Fuel Systems, Components & Electronics
Please support a Racetronix dealer near you for personalized service.
>WEB SITE<
