Hello all

I'm trying to make my setup for next year, trying to hit mid 500 whp, and I'm not sure if the Walbro 255lph pump is adaquate, as I got mixed answers when I asked the question before.

I thought about adding an additional In-tank fuel pump, or even an inline pump, but I was jusdt wondering if anyone has done this, what kind of power numbers they're putting down (is there enough fuel at that point?)

thanks

 

The Supra TT fuel pump may be a good alternative for you, it flows slightly more than the 255.

 

6<TABLE WIDTH="90%" CELLSPACING=0 CELLPADDING=0 ALIGN=CENTER><TR><TD>Quote, originally posted by kpt4321 &raquo;</TD></TR><TR><TD CLASS="quote">The Supra TT fuel pump may be a good alternative for you, it flows slightly more than the 255.
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bad info...supra pump doesnt flow well at high fuel pressure. so if you are running big boost, which he will be if making mid 500whp, the walbro 255hp is going to be a much better option then the supra pump. i made a post a couple weeks ago with details on the supra vs. walbro pump comparison.

i dont know of anyone running a dual intank setup on a honda..not sure if there even enough room. most people just go with an external pump, which is what ide do if your shooting for that much power.

 

well im trying to do this without having to use an external pump for a vareity of reasons....

which is why i was considering the dual intanks, or an inline on top of the walbro

 

i am using a holley intank and a bosch (prev. from the DRAG 2 kit) and boosting 29 psi. last dyno was 515 whp @ 25psi. now with the fullrace mani and 29 psi i am guessing i am around 550-560 whp.

 

<TABLE WIDTH="90%" CELLSPACING=0 CELLPADDING=0 ALIGN=CENTER><TR><TD>Quote, originally posted by M.K.C. &raquo;</TD></TR><TR><TD CLASS="quote">well im trying to do this without having to use an external pump
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<TABLE WIDTH="90%" CELLSPACING=0 CELLPADDING=0 ALIGN=CENTER><TR><TD>Quote, originally posted by M.K.C. &raquo;</TD></TR><TR><TD CLASS="quote"> , or an inline on top of the walbro
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inline = external

 

<TABLE WIDTH="90%" CELLSPACING=0 CELLPADDING=0 ALIGN=CENTER><TR><TD>Quote, originally posted by gritsak &raquo;</TD></TR><TR><TD CLASS="quote">6

bad info...supra pump doesnt flow well at high fuel pressure. so if you are running big boost, which he will be if making mid 500whp, the walbro 255hp is going to be a much better option then the supra pump.</TD></TR></TABLE>


Many Many times this debate has come up, because DSM'ers have ben making big power on these two pumps for close to 10 years now.

It has been proven in cars that are leaning out with the walbro 255, than the Supra pump is a better alternative.

 

<TABLE WIDTH="90%" CELLSPACING=0 CELLPADDING=0 ALIGN=CENTER><TR><TD>Quote, originally posted by kpt4321 &raquo;</TD></TR><TR><TD CLASS="quote">


Many Many times this debate has come up, because DSM'ers have ben making big power on these two pumps for close to 10 years now.

It has been proven in cars that are leaning out with the walbro 255, than the Supra pump is a better alternative.
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on what kind of HP car? pushing how much boost? at what FP?

what about the countless people ith supras what have leaned out top end with dual stock supra pumps, and simply switching them out with walbros the problems are fixed...the supra pump does not flow as good at high FP as the walbro, period. ive seen the supra pump support around 500whp, but that was in a supra with a big turbo, not running a ton of boost....if this guy is shooting for mid 500whp, you can expect to run 2bar+ of boost, depending on his setup, which is gonna be over 70psi fp, and the supra pump isnt going to hold that high pressure, its going to die off and lean out

 

<TABLE WIDTH="90%" CELLSPACING=0 CELLPADDING=0 ALIGN=CENTER><TR><TD>Quote, originally posted by gritsak &raquo;</TD></TR><TR><TD CLASS="quote">
on what kind of HP car? pushing how much boost? at what FP?
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500+ wheel horsepower, which comes out to over 25 psi of boost, or about 70 psi of fuel pressure.

 

<TABLE WIDTH="90%" CELLSPACING=0 CELLPADDING=0 ALIGN=CENTER><TR><TD>Quote, originally posted by kpt4321 &raquo;</TD></TR><TR><TD CLASS="quote">

500+ wheel horsepower, which comes out to over 25 psi of boost, or about 70 psi of fuel pressure.
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whos car

 

supras often use twin TT pumps for 1000 HP setups, you shouldn't need high pressure if you do your setup right. (70-80 psi or so max)

 

eitherway i wouldnt put a supraTT or a walbro 255 in my car when shooting for mid 500whp.

but for you guys that want some more info on real world experience of people actually pushing stock supra pumps to the limit and them dying out, heres a thread...and im talking about 70-80psi here...which is what most setups will run at 2bar of boost (assuming a base pressure around 40-45psi)...im not talking about some 15:1 fmu crap

http://www.supraforums.com/for...albro