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how far can a racetronix 255 pump go on boost?

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Old 09-10-2012 | 07:45 PM
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Default how far can a racetronix 255 pump go on boost?

I currently have full bolt ons, blower cam, 6.0L heads, and a procharger running 6 pounds of boost. I am using a racetronix pump with their wiring kit along with 60 pound injectors. I do have a boost regulated fuel pressure regulator but I don't have that installed, which I am not sure if it will help. I would like to raise the boost to 8 pounds. Can this pump keep up?
Old 09-11-2012 | 08:42 AM
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that 255 pump will only really supply enough uumph for 51.3# injectors (see fuel & injector sticky here: https://ls1tech.com/forums/2638447-post1.html)
Old 09-13-2012 | 02:13 PM
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Could he use a boost-a-pump the racetronix harness should have a provision for it.
Old 09-16-2012 | 04:26 PM
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Injectors and boost are irrelevant.

The power you are making is very relevant. in the UK a single Walbro would be at it's limit at around 500 flywheel HP.

It seems to go further for American rwhp though.
Old 09-16-2012 | 04:44 PM
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this pump is usually paired with 42's
Old 09-16-2012 | 07:43 PM
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Typically I recommend them for up to 550rwhp.
Old 09-16-2012 | 07:55 PM
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Damn I might need two 255 walbro soon :/
Old 09-17-2012 | 09:27 AM
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Originally Posted by stevieturbo
Injectors and boost are irrelevant.

The power you are making is very relevant. in the UK a single Walbro would be at it's limit at around 500 flywheel HP.

It seems to go further for American rwhp though.
bull. injectors and boost are relevant, especially if you are NOT running a FPR.
Are you speaking N/A HP? or Boosted HP?


Originally Posted by 97s10ls
Could he use a boost-a-pump the racetronix harness should have a provision for it.
He could but wouldn't gain much flow
Old 09-17-2012 | 11:20 AM
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a second pump would have cost you less than the regulator you just bought but would have actually helped.
Old 09-17-2012 | 12:09 PM
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On a built 6.2 w/ cam and KYTP turbo kit..9psi and made just under 600RWHP and tq on a single 255. Fuel pressure is still staying up in the higher RPM range. But I would add another pump.
Old 09-17-2012 | 02:33 PM
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Originally Posted by ZL1Killa
bull. injectors and boost are relevant, especially if you are NOT running a FPR.
Are you speaking N/A HP? or Boosted HP?
Well if you think a 500hp capable pump can magically provide 1000bhp of fuel simply by fitting large enough injectors...work away.
Old 09-17-2012 | 02:36 PM
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This pump setup is what I am going with for my P1SC build
Old 09-17-2012 | 03:22 PM
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Originally Posted by stevieturbo
Injectors and boost are irrelevant.

The power you are making is very relevant. in the UK a single Walbro would be at it's limit at around 500 flywheel HP.

It seems to go further for American rwhp though.
Originally Posted by stevieturbo
Well if you think a 500hp capable pump can magically provide 1000bhp of fuel simply by fitting large enough injectors...work away.
did you even read what I said? without a FPR boost is relevant.

each and every pump has a flow curve, i know this.

I currently have full bolt ons, blower cam, 6.0L heads, and a procharger running 6 pounds of boost. I am using a racetronix pump with their wiring kit along with 60 pound injectors. I do have a boost regulated fuel pressure regulator but I don't have that installed, which I am not sure if it will help. I would like to raise the boost to 8 pounds. Can this pump keep up?

To answer the questions in the first post,

That pump with the FPR will likely hold you, but it will be close.

Going with two pumps (255 s) would greatly benefit you and increase your maximum injector capacity.



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