1 Fuel Pump For Primaries 1 For Seconaries?
08-30-2005, 09:42 AM
#12
Senior Member
Join Date: Jan 2003
Location: union, new jersey
Posts: 8,079
2 regulators are not needed if you are using an aeromotive unit... actually 2 regulators will probably bring your fuel pressure lower. remember the regulator restricts the return to increase fuel pressure, kinda like you sqeezing the return line or clamping it.
actually why dont you try that... get a vice grip and clamp your return line (pick a spot where you have rubber lines, not the -an ones) see if your fuel pressure goes up really high. if it goes up, i guess you would have a fuel pressure regulator problem, and if it doesnt, its more the delivery(pump, lines, filter, strainer).
you do have the fpr after the rails right?
actually why dont you try that... get a vice grip and clamp your return line (pick a spot where you have rubber lines, not the -an ones) see if your fuel pressure goes up really high. if it goes up, i guess you would have a fuel pressure regulator problem, and if it doesnt, its more the delivery(pump, lines, filter, strainer).
you do have the fpr after the rails right?
08-30-2005, 10:45 AM
#13
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Thread Starter
Join Date: Oct 2004
Posts: 35
I'm pretty sure it's not the FPR itself cuz I swapped it with another one and it did the same thing (drop fuel pressure from 60 down to 40 under full boost). As far as where it's installed...I don't remember but it was at the same location the stock fpr was installed. Does it make huge difference?
08-30-2005, 02:29 PM
#14
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Join Date: Aug 2005
Posts: 38
Increase the size of your lines with a good one regulator and a good one fuel pump.
If you run at high boost psi (30 + psi) use dual fuel lines, dual regulator and dual pump.
This probably helps you a lot...
http://www.weldonracing.com/
If you run at high boost psi (30 + psi) use dual fuel lines, dual regulator and dual pump.
This probably helps you a lot...
http://www.weldonracing.com/
08-30-2005, 09:09 PM
#15
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Join Date: Jan 2003
Location: union, new jersey
Posts: 8,079
[quote name='MichaelB145' date='Aug 30 2005, 10:45 AM']I'm pretty sure it's not the FPR itself cuz I swapped it with another one and it did the same thing (drop fuel pressure from 60 down to 40 under full boost). As far as where it's installed...I don't remember but it was at the same location the stock fpr was installed. Does it make huge difference?
[/quote]
the stock fpr is setup for a 1 feed line that goes through both rails.... fuel enters the primary fuel rail from the back of the motor, goes through it, exits on the front part of the motor, then enters the secondary rails from the front of the motor, then exits by the fuel pressure regulator towards the back fo the motor.
this wont work for you if you are using 2 feed lines. fuel has to come in one side, and exit on the other end, and meet at the fuel pressure regulator.
would you mind taking a picture of your system?
[snapback]753543[/snapback]
[/quote]
the stock fpr is setup for a 1 feed line that goes through both rails.... fuel enters the primary fuel rail from the back of the motor, goes through it, exits on the front part of the motor, then enters the secondary rails from the front of the motor, then exits by the fuel pressure regulator towards the back fo the motor.
this wont work for you if you are using 2 feed lines. fuel has to come in one side, and exit on the other end, and meet at the fuel pressure regulator.
would you mind taking a picture of your system?
08-30-2005, 09:22 PM
#16
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Join Date: Jul 2001
Location: NJ
Posts: 17,839
the dual pump setup will work. i went overkill on my FD sumped tank, ss an lines from the tank to the weldon external filter and external sx pump to sx fpr on the fuel rail.......never had a fuel problem but it cost so much money
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