Fuel pump options
Thread Starter
Instructor
Joined: Feb 2011
Posts: 241
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From: southeast AZ
Fuel pump options
2008 Base MN6 with Novi 1500 supercharger. About 8 psi and ~600rwhp.
Currently running stock pump with KB boost a pump. On the dyno, lost fuel pressure at 4500 rpm. Since discovered a broken wire causing BAP not to kick in. After fixing it, I am still losing pressure at 5800 rpm ( dropped below 55psi ).
Right now I am thinking either dual Walbro 255s, or Aeromotive 340 with the BAP. I know the dual Walbros should be plenty, but is it a better solution than the 340 and BAP? Will the 340 fit without modifications? How much can the 340 handle without a BAP?
Id rather not make major modifications to the fuel system, like new lines. Shouldn't be necessary for my power level.
advTHXance
Currently running stock pump with KB boost a pump. On the dyno, lost fuel pressure at 4500 rpm. Since discovered a broken wire causing BAP not to kick in. After fixing it, I am still losing pressure at 5800 rpm ( dropped below 55psi ).
Right now I am thinking either dual Walbro 255s, or Aeromotive 340 with the BAP. I know the dual Walbros should be plenty, but is it a better solution than the 340 and BAP? Will the 340 fit without modifications? How much can the 340 handle without a BAP?
Id rather not make major modifications to the fuel system, like new lines. Shouldn't be necessary for my power level.
advTHXance
Le Mans Master
Joined: Jan 2003
Posts: 8,596
Likes: 19
From: Portland Oregon
2008 Base MN6 with Novi 1500 supercharger. About 8 psi and ~600rwhp.
Currently running stock pump with KB boost a pump. On the dyno, lost fuel pressure at 4500 rpm. Since discovered a broken wire causing BAP not to kick in. After fixing it, I am still losing pressure at 5800 rpm ( dropped below 55psi ).
Right now I am thinking either dual Walbro 255s, or Aeromotive 340 with the BAP. I know the dual Walbros should be plenty, but is it a better solution than the 340 and BAP? Will the 340 fit without modifications? How much can the 340 handle without a BAP?
Id rather not make major modifications to the fuel system, like new lines. Shouldn't be necessary for my power level.
advTHXance
Currently running stock pump with KB boost a pump. On the dyno, lost fuel pressure at 4500 rpm. Since discovered a broken wire causing BAP not to kick in. After fixing it, I am still losing pressure at 5800 rpm ( dropped below 55psi ).
Right now I am thinking either dual Walbro 255s, or Aeromotive 340 with the BAP. I know the dual Walbros should be plenty, but is it a better solution than the 340 and BAP? Will the 340 fit without modifications? How much can the 340 handle without a BAP?
Id rather not make major modifications to the fuel system, like new lines. Shouldn't be necessary for my power level.
advTHXance
Safety Car
Joined: Dec 2009
Posts: 4,754
Likes: 303
2008 Base MN6 with Novi 1500 supercharger. About 8 psi and ~600rwhp.
Currently running stock pump with KB boost a pump. On the dyno, lost fuel pressure at 4500 rpm. Since discovered a broken wire causing BAP not to kick in. After fixing it, I am still losing pressure at 5800 rpm ( dropped below 55psi ).
Right now I am thinking either dual Walbro 255s, or Aeromotive 340 with the BAP. I know the dual Walbros should be plenty, but is it a better solution than the 340 and BAP? Will the 340 fit without modifications? How much can the 340 handle without a BAP?
Id rather not make major modifications to the fuel system, like new lines. Shouldn't be necessary for my power level.
advTHXance
Currently running stock pump with KB boost a pump. On the dyno, lost fuel pressure at 4500 rpm. Since discovered a broken wire causing BAP not to kick in. After fixing it, I am still losing pressure at 5800 rpm ( dropped below 55psi ).
Right now I am thinking either dual Walbro 255s, or Aeromotive 340 with the BAP. I know the dual Walbros should be plenty, but is it a better solution than the 340 and BAP? Will the 340 fit without modifications? How much can the 340 handle without a BAP?
Id rather not make major modifications to the fuel system, like new lines. Shouldn't be necessary for my power level.
advTHXance
Safety Car
Joined: Oct 2008
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From: Ft. Collins, CO
Thread Starter
Instructor
Joined: Feb 2011
Posts: 241
Likes: 0
From: southeast AZ
I will be doing to labor myself. Where can you find it for $180? Everywhere I see is $220-250
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Safety Car
Joined: Oct 2008
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From: Ft. Collins, CO
email me at walhan_qtr@msn.com and I will send you the email address of the guy I deal with. its $185 without the install kit which is like $15. also that price is with overnight shipping
Melting Slicks
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From: Santa Barbara CA
Thread Starter
Instructor
Joined: Feb 2011
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From: southeast AZ
I did find out that the 450 (e85) pump flows slightly more than the 400, it's actually rated at 416 lph. Also for reference, the part number for the 450 pump is F90000267.
I ordered one last night, along with a Racetronix harness to pull power directly from the alternator rather than through the stock wiring. If I get everything in I might swap it this weekend. If I do, maybe I'll get some pictures while I'm at it. Depends if I'm pressed for time.
Safety Car
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From: Ft. Collins, CO
Former Vendor
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From: Colorado Springs CO
Thread Starter
Instructor
Joined: Feb 2011
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From: southeast AZ
Thread Starter
Instructor
Joined: Feb 2011
Posts: 241
Likes: 0
From: southeast AZ
Well I got the Walbro 450 installed. Ended up cutting a hole in the side of the bucket for the sock, since it doesnt come with a venturi to keep the bucket full.
Took the car out tonight, without the boost a pump, it started losing pressure a little over 5k rpm. With the boost a pump, I was able to run it to 6500rpm but my low pressure alarm came on right at the very end (<55-58psi or so). I'm estimating I was putting out around 600rwhp.
Don't know whats going on, this should be able to pump plenty of fuel for my setup. Back to the drawing board I guess.
Took the car out tonight, without the boost a pump, it started losing pressure a little over 5k rpm. With the boost a pump, I was able to run it to 6500rpm but my low pressure alarm came on right at the very end (<55-58psi or so). I'm estimating I was putting out around 600rwhp.
Don't know whats going on, this should be able to pump plenty of fuel for my setup. Back to the drawing board I guess.
Safety Car
Joined: Oct 2008
Posts: 3,966
Likes: 17
From: Ft. Collins, CO
Well I got the Walbro 450 installed. Ended up cutting a hole in the side of the bucket for the sock, since it doesnt come with a venturi to keep the bucket full.
Took the car out tonight, without the boost a pump, it started losing pressure a little over 5k rpm. With the boost a pump, I was able to run it to 6500rpm but my low pressure alarm came on right at the very end (<55-58psi or so). I'm estimating I was putting out around 600rwhp.
Don't know whats going on, this should be able to pump plenty of fuel for my setup. Back to the drawing board I guess.
Took the car out tonight, without the boost a pump, it started losing pressure a little over 5k rpm. With the boost a pump, I was able to run it to 6500rpm but my low pressure alarm came on right at the very end (<55-58psi or so). I'm estimating I was putting out around 600rwhp.
Don't know whats going on, this should be able to pump plenty of fuel for my setup. Back to the drawing board I guess.
also did you figure out why you are losing pressure? this pump should be good all the way to 700whp!!!!
