i would like to keep my factory fuel tank in the car but need lots of fuel for my 1200cc inj. i have a paxton pump good for 800hp. but puting after in tank will retrick the flow. i want to use to walbro 255 gph in tanks pumps side by side and new fittings on to of pick up with 8 an fittings 1/2" alum fuel line front to back. oh yea 3/8 off pumps split into a y 1/2" out. use old sending line for return in tank. any tryed this? i saw an supra do this in sport compact mag. will 2 intake pumps suport 1200cc inj pushing 700 to 800hp? thanks for you time!

 

why not run a fuel sump off the stock tank and use only the paxton with new lines?

 

yea , but is it legal for comp rules? or i would do that!

 

2 255lph will definitely support the hp......but if you have 1 pump go bad you might not know until its to late

 

<TABLE WIDTH="90%" CELLSPACING=0 CELLPADDING=0 ALIGN=CENTER><TR><TD>Quote, originally posted by dphonesavang &raquo;</TD></TR><TR><TD CLASS="quote">i would like to keep my factory fuel tank in the car but need lots of fuel for my 1200cc inj. i have a paxton pump good for 800hp. but puting after in tank will retrick the flow. i want to use to walbro 255 gph in tanks pumps side by side and new fittings on to of pick up with 8 an fittings 1/2" alum fuel line front to back. oh yea 3/8 off pumps split into a y 1/2" out. use old sending line for return in tank. any tryed this? i saw an supra do this in sport compact mag. will 2 intake pumps suport 1200cc inj pushing 700 to 800hp? thanks for you time!</TD></TR></TABLE>

I made this exact set-up for my race car, except they were the external style Walbro 255 high-pressure pumps. They have the same pump internals as the in-tank models. The two pumps, at 50 psi, through a single -6 AN line, flowed enough fuel to support 1050HP at 13.2 VDC.

 

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

I made this exact set-up for my race car, except they were the external style Walbro 255 high-pressure pumps. They have the same pump internals as the in-tank models. The two pumps, at 50 psi, through a single -6 AN line, flowed enough fuel to support 1050HP at 13.2 VDC.

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Did you have to sump the tank to run the external pumps? Mind sharing how you did it? Inline or parrallel pumps?

 

<TABLE WIDTH="90%" CELLSPACING=0 CELLPADDING=0 ALIGN=CENTER><TR><TD>Quote, originally posted by dphonesavang &raquo;</TD></TR><TR><TD CLASS="quote">yea , but is it legal for comp rules? or i would do that!</TD></TR></TABLE>

Which class do you plan on competing in? As far as I know, you can run an external pump with a sumped stock tank in Turbo4 and SFWD only states that you can't run a fuel cell, so a sumped tank would work. I'm sure the other T4/SFWD guys would chime in.

Just keep it simple.

 

I ran full-race sump with external pump and -8an to fuel rail and use the feed for return.

 

thanks for the input. next ? did you guys weld the sump on the tank or bolt with gasket? i can get a new tank can cut and weld a sump on it. what do the rules say? do you have to weld the sump?

 

You just weld it. U dont have to cut anything, just dril holes in tank where its going to be welded. Full-Race sump comes with instructions.

 

<TABLE WIDTH="90%" CELLSPACING=0 CELLPADDING=0 ALIGN=CENTER><TR><TD>Quote, originally posted by Turbocivic94 &raquo;</TD></TR><TR><TD CLASS="quote">You just weld it. U dont have to cut anything, just dril holes in tank where its going to be welded. Full-Race sump comes with instructions.</TD></TR></TABLE>

Full-Race has a nice simple setup. Contact them for instructions/pictures.

 

You need to make sure that the Paxton is a puller pump if you're not running a sump. I doubt it though. I am running the Bosch Pump, it is a puller pump and I am not running a sump. I made a custom fuel pickup from the stock factory tank cover and I installed the Bosch on the outside of the tank.

We're pushing almost 800 hp with it and still runs fine and I have even made a pass at the track with the fuel light low light on and never leaned out at all.





I helped Jason Hunt with the setup as well on his CRX and now, well...low 9's is in the works... hahhaha, I sure hope so

Stan

 

well i was going to do that, but if you run a tube with a sack on in the tank how are you going to get the fuel up and back down again? will the pump suck enough to pull the gas up and out?

 

The two pumps in the tank will work for lots of horsepower. I am running 2 285 holly pumps and making plenty of power. The nice thing about this setup it is its not load at all

 

<TABLE WIDTH="90%" CELLSPACING=0 CELLPADDING=0 ALIGN=CENTER><TR><TD>Quote, originally posted by dphonesavang &raquo;</TD></TR><TR><TD CLASS="quote">well i was going to do that, but if you run a tube with a sack on in the tank how are you going to get the fuel up and back down again? will the pump suck enough to pull the gas up and out?</TD></TR></TABLE>

I used the bosch pump which is a puller pump. Aeromotive, paxton are all pusher pump. It can only push what's collected on the inlet side. Bosch can actually pull it from any source.

We sell the bosch pump for $ 300

 

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

Did you have to sump the tank to run the external pumps? Mind sharing how you did it? Inline or parrallel pumps?</TD></TR></TABLE>

I had a fuel cell. The pumps were run parallel and came together with a -6AN Y fitting.

 

Damn, I wish I knew this before cause I just did my fuel setup

 

so can i run my paxton pump under the car in the back? in the sfwd class?

 

I run twin walbro 255 high pressures intank for my setup with a -6an Y fitting to a single -6an line. Works fine, and i haven't had a problem so far.

 

yes you can

 

some people run performance inline and intank fuel pump together

 

<TABLE WIDTH="90%" CELLSPACING=0 CELLPADDING=0 ALIGN=CENTER><TR><TD>Quote, originally posted by eg:R &raquo;</TD></TR><TR><TD CLASS="quote">some people run performance inline and intank fuel pump together</TD></TR></TABLE>

let me put it in a different way, would you use your garden hose to feed a fire hydrant hose ? essentially that's what the above scenario is. You're using the smaller pump to drive the bigger pump. It's better to remocve the smaller one and run the bigger one.

stan

 

stan, is that the same bosch pump that endyne sells??

 

<TABLE WIDTH="90%" CELLSPACING=0 CELLPADDING=0 ALIGN=CENTER><TR><TD>Quote, originally posted by paul vang &raquo;</TD></TR><TR><TD CLASS="quote">stan, is that the same bosch pump that endyne sells??</TD></TR></TABLE>

Yes