Fuel pressure problem
Thread Starter
Le Mans Master
Joined: Jun 2003
Posts: 5,409
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From: Kentucky basketball is life the rest is just details
Fuel pressure problem
I installed the Racetronix fuel pump last week because I was having fuel pressure loss at high rpm under boost. All in all the install was a lot easier than I expected. 
However, I'm still losing fuel pressure. I've got a 99 with the twin intercooled ATI. Now I'm wondering if there was something I could have done wrong during the install that would make the pump run (the car starts and runs fine until I go WOT) but not boost the output like it's supposed to. Any ideas? Should I go with the boost-a-pump? Should I switch to the 97 style return?
At this point I'm willing to listen to any ideas you guys have.
TIA.
However, I'm still losing fuel pressure. I've got a 99 with the twin intercooled ATI. Now I'm wondering if there was something I could have done wrong during the install that would make the pump run (the car starts and runs fine until I go WOT) but not boost the output like it's supposed to. Any ideas? Should I go with the boost-a-pump? Should I switch to the 97 style return?
At this point I'm willing to listen to any ideas you guys have.
TIA.
Le Mans Master
Joined: Sep 2000
Posts: 6,976
Likes: 527
From: Clouds Over California
Originally Posted by SleepieAce
I installed the Racetronix fuel pump last week because I was having fuel pressure loss at high rpm under boost. All in all the install was a lot easier than I expected.
However, I'm still losing fuel pressure. I've got a 99 with the twin intercooled ATI. Now I'm wondering if there was something I could have done wrong during the install that would make the pump run (the car starts and runs fine until I go WOT) but not boost the output like it's supposed to. Any ideas? Should I go with the boost-a-pump? Should I switch to the 97 style return?
At this point I'm willing to listen to any ideas you guys have.
TIA.
However, I'm still losing fuel pressure. I've got a 99 with the twin intercooled ATI. Now I'm wondering if there was something I could have done wrong during the install that would make the pump run (the car starts and runs fine until I go WOT) but not boost the output like it's supposed to. Any ideas? Should I go with the boost-a-pump? Should I switch to the 97 style return?
At this point I'm willing to listen to any ideas you guys have.
TIA.
Melting Slicks
Joined: Mar 2002
Posts: 2,931
Likes: 2
From: Tx
Originally Posted by SleepieAce
I installed the Racetronix fuel pump last week because I was having fuel pressure loss at high rpm under boost. All in all the install was a lot easier than I expected.
However, I'm still losing fuel pressure. I've got a 99 with the twin intercooled ATI. Now I'm wondering if there was something I could have done wrong during the install that would make the pump run (the car starts and runs fine until I go WOT) but not boost the output like it's supposed to. Any ideas? Should I go with the boost-a-pump? Should I switch to the 97 style return?
At this point I'm willing to listen to any ideas you guys have.
TIA.
However, I'm still losing fuel pressure. I've got a 99 with the twin intercooled ATI. Now I'm wondering if there was something I could have done wrong during the install that would make the pump run (the car starts and runs fine until I go WOT) but not boost the output like it's supposed to. Any ideas? Should I go with the boost-a-pump? Should I switch to the 97 style return?
At this point I'm willing to listen to any ideas you guys have.
TIA.
Every time I state this a few random people chime in saying that they have no fuel pressure drop at all with the 99-02 system (with racetronix + BAP). I'm guessing these people either have a freak of nature setup or they don't have a fuel pressure data logging device they can use to understand what is really happening with their fuel pressure under varying conditions (most people do a few pulls on the dyno and think all is well).
Thread Starter
Le Mans Master
Joined: Jun 2003
Posts: 5,409
Likes: 0
From: Kentucky basketball is life the rest is just details
Thanks guys. That kind of what I was thinking. I saw the Racetronix post about their new FPR system, and I think that's the way I'm going to go when it comes out. Until then, I'll just drive carefully.
Le Mans Master
Joined: Sep 2000
Posts: 6,976
Likes: 527
From: Clouds Over California
Originally Posted by QuickSilver2002
I'll state this again (this will be about the 30th time now). The regulator in the back will cause a fuel pressure drop no matter how good/big/strong the pump is. I tired everything you can imagine and the only thing that worked was putting a regulator and return on the rail.
Every time I state this a few random people chime in saying that they have no fuel pressure drop at all with the 99-02 system (with racetronix + BAP). I'm guessing these people either have a freak of nature setup or they don't have a fuel pressure data logging device they can use to understand what is really happening with their fuel pressure under varying conditions (most people do a few pulls on the dyno and think all is well).
Every time I state this a few random people chime in saying that they have no fuel pressure drop at all with the 99-02 system (with racetronix + BAP). I'm guessing these people either have a freak of nature setup or they don't have a fuel pressure data logging device they can use to understand what is really happening with their fuel pressure under varying conditions (most people do a few pulls on the dyno and think all is well).
Is it all cars made after Thanksgiving 2002 that have the new fuel pump systems? I have an 01 with the Racetronix and BAP and my fuel pressure did drop some but still managed to support over 600rwhp with the AFR at 11.5.
I want my FP to be rock solid at 60-65psi. I don't want to have to go backwards and install the 97-98 rail. So the Racetronix is the ticket for over 650rwhp. I am thinking with the new return system the BAP will not even be necessary.
Le Mans Master
Joined: Jul 2002
Posts: 7,370
Likes: 8
From: Slave to the evil empire
Cruise-In V Veteran
St. Jude Donor '04
Originally Posted by Shinobi'sZ
Is it all cars made after Thanksgiving 2002 that have the new fuel pump systems?
Melting Slicks
Joined: Mar 2002
Posts: 2,931
Likes: 2
From: Tx
Originally Posted by Shinobi'sZ
Thats why I said wait until Racetronix comes out with their new return system. It should resolve the problem associated with the regulator on the back.
Is it all cars made after Thanksgiving 2002 that have the new fuel pump systems? I have an 01 with the Racetronix and BAP and my fuel pressure did drop some but still managed to support over 600rwhp with the AFR at 11.5.
I want my FP to be rock solid at 60-65psi. I don't want to have to go backwards and install the 97-98 rail. So the Racetronix is the ticket for over 650rwhp. I am thinking with the new return system the BAP will not even be necessary.
Is it all cars made after Thanksgiving 2002 that have the new fuel pump systems? I have an 01 with the Racetronix and BAP and my fuel pressure did drop some but still managed to support over 600rwhp with the AFR at 11.5.
I want my FP to be rock solid at 60-65psi. I don't want to have to go backwards and install the 97-98 rail. So the Racetronix is the ticket for over 650rwhp. I am thinking with the new return system the BAP will not even be necessary.
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Thread Starter
Le Mans Master
Joined: Jun 2003
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From: Kentucky basketball is life the rest is just details
Originally Posted by vetterdstr
In the meantime, I would install the BAP... no knowing when that new system will come out and you dont want to blow up your engine while waiting.
VR
VR
Melting Slicks
Joined: Jan 2003
Posts: 3,251
Likes: 4
Originally Posted by SleepieAce
I installed the Racetronix fuel pump last week because I was having fuel pressure loss at high rpm under boost. All in all the install was a lot easier than I expected.
However, I'm still losing fuel pressure. I've got a 99 with the twin intercooled ATI. Now I'm wondering if there was something I could have done wrong during the install that would make the pump run (the car starts and runs fine until I go WOT) but not boost the output like it's supposed to. Any ideas? Should I go with the boost-a-pump? Should I switch to the 97 style return?
At this point I'm willing to listen to any ideas you guys have.
TIA.
However, I'm still losing fuel pressure. I've got a 99 with the twin intercooled ATI. Now I'm wondering if there was something I could have done wrong during the install that would make the pump run (the car starts and runs fine until I go WOT) but not boost the output like it's supposed to. Any ideas? Should I go with the boost-a-pump? Should I switch to the 97 style return?
At this point I'm willing to listen to any ideas you guys have.
TIA.
Have you changed the fuel filter?
Melting Slicks
Joined: Aug 2003
Posts: 3,306
Likes: 5
Originally Posted by drcoffee
What kind of FP are you seeing? It will drop somewhat but should stay above 58-60 psi with cool gas in the tank at WOT. Is your fuel pressure dropping below that?
Have you changed the fuel filter?
Have you changed the fuel filter?
Pro
Joined: Jan 2002
Posts: 741
Likes: 9
From: Rancho Cordova CA
Return style
LS1 speed has nice billet rails, combine them with a Aeromotive regulator, filter, 8 AN line, the stock line as a return, Racetronix pump, BAP and wala, no pressure drop. Or you can wait for Racetronix.
Team Owner
Joined: Mar 1999
Posts: 28,753
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From: San Jose/Bear Valley CA
CA Events Coordinator
Originally Posted by Steve'01
LS1 speed has nice billet rails, combine them with a Aeromotive regulator, filter, 8 AN line, the stock line as a return, Racetronix pump, BAP and wala, no pressure drop. Or you can wait for Racetronix.
VR
Le Mans Master
Joined: Jul 2002
Posts: 7,370
Likes: 8
From: Slave to the evil empire
Cruise-In V Veteran
St. Jude Donor '04
LS1 speed has nice billet rails, combine them with a Aeromotive regulator, filter, 8 AN line, the stock line as a return, Racetronix pump, BAP and wala, no pressure drop. Or you can wait for Racetronix.
Originally Posted by vetterdstr
How about a link to that kit?
VR
VR
Melting Slicks
Joined: Dec 2002
Posts: 3,296
Likes: 30
From: Friendswood, Tx
So, guys, do you think that the Racetronix with a BAP is enough to support 500-520hp? That's about what I'm making and I'm considering adding a BAP soon......unless you think that this still won't be enough. Any idea on the cost of a BAP?
Thanks!
Jason
Thanks!
Jason
Thread Starter
Le Mans Master
Joined: Jun 2003
Posts: 5,409
Likes: 0
From: Kentucky basketball is life the rest is just details
Originally Posted by drcoffee
What kind of FP are you seeing? It will drop somewhat but should stay above 58-60 psi with cool gas in the tank at WOT. Is your fuel pressure dropping below that?
Have you changed the fuel filter?
Have you changed the fuel filter?
No I haven't changed the filter. That's something else I should do. I hadn't thought of it. The pressure is dropping to about 48 psi at high rpms. It holds up pretty well below about 4500 rpm.
So, guys, do you think that the Racetronix with a BAP is enough to support 500-520hp? That's about what I'm making and I'm considering adding a BAP soon......unless you think that this still won't be enough. Any idea on the cost of a BAP?
