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-   -   Twin fuel pump questions (https://www.clublexus.com/forums/sc-1st-gen-1992-2000/554537-twin-fuel-pump-questions.html)

Biggu Feb 22, 2011 07:19 AM

Twin fuel pump questions
 
Hey guys, Im trying to get ideas on how i want to run the twin pumps. I have the pumps mounted to the hanger with out any issues but How is everyone converging their fuel lines into one single.

this is how i planned to run it,
https://i18.photobucket.com/albums/b...9/DSC_0560.jpg
https://i18.photobucket.com/albums/b...9/DSC_0561.jpg

however Once I got the pumps on no matter which way I move the pumps one of the fuel lines kink.

what my other ideas are is there is another access pannel on top of the fuel pump. I was thinking about drilling there and then putting the -8 an bulk head there instead that way I can use a longer fuel hose from the pumps and not worry about it kinking and having more room to move

I had also throught about just welding another -8 an bulkhead to the bottom of the tank( i think i saw some one else do this that way the fuel line length isnt an issue.

So those guys with twin fuel pumps how did you conjoin the line, in tank outta tank? those guys that did in tank how did you converge then come out of the tank? Either way it looks like im removing the fuel tank.

LexusFTW Feb 22, 2011 08:10 AM

I ran two dedicated lines to each end of the fuel rail. I welded two -6AN fittings on the bulkhead you pictured.

whiteSc3 Feb 23, 2011 10:33 PM

I run one pump through stock line to the back of the rail and a 2nd AN line to the front.

moto696 Feb 27, 2011 06:35 AM

dumb quest but why do 2 pumps?

nlc Feb 27, 2011 07:27 AM

^^^Why 2 breast instead of 1? more milk/ more jiggling fun...u get me point. lol

moto696 Feb 27, 2011 12:03 PM

so it it for a faster pump when you have a modded motor? (more air, more fuel, more spark, more power)

Biggu Feb 28, 2011 06:45 AM

move flow of fuel. im feeding E85 to ID1000CC injectors where fuel will be needed.

RedPhoenix Mar 1, 2011 05:22 AM

Dont forget check valves with the Walbros... if one dies the other one will feed fuel right back into the gas tank instead of the engine..... If you are using Walbro's (didnt see it).

moto696 Mar 1, 2011 05:28 AM

i have a walborr hp 255 are u sayn get rid of it?

RedPhoenix Mar 1, 2011 07:56 PM

Not at all.... but as far as I know they dont have internal check valves. I have a twin setup on my Supra.


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