Dual intank fuel pumps

BluemeanieTSi · Dec 31, 2004

i started trying to figure out how to put dual pumps in the stock housing but that wasn't happening without major hacking. since it was my only housing i had i started looking for alternatives so i decided to build my own.

the housing cost me about 10 bux and 2 days to make, i still need to wire it.

here's what i started with but this ended up not working well due to return line placement.

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the housing isn't all that thick it was the thickest metal i could find at the local tractor supply company. i just cut a circle to match the upper piece and welded a support rod to it, then welded the inner ring piece for the gasket, test fit to make sure it sealed ok then started on the feed lines. they are 3/8th brake line i bought 3/8th brake unions and ordered 3/8th flare to 6 an fittings from summit. the housing cost me around 10 bux and the fittings cost around 15 total for that part.

(ignore the twisted screens the pumps weren't secured yet for this pic)

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after about a days work (i'm not much for planning things out) i realized i had no room for wiring or a return line. soooooo i started over

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the two 45 degree 6an hose ends clear the back seat with no modification following the factory feed lines. the "y" block is a BG (barry grant) fuel block i got from jegs for around 30 bux and it is 3/8th NPT, it comes with a pressure tap source that needs to be plugged (i see no need to put a gauge back there) the lines are 6 an then 3/8 to 6an 45 degree fittings for inlefts with a 3/8th to 8 an and 8 an line from then on.

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i kept the float for street car use, and i kept the gauge light crap just so i didnt' have to cut it apart. the return line is 3/8th and the vent is 1/4 brake line, i'll be using the factory feed hard line as a larger return line so i dont' have to run another line under tha car i'll use the existing one which i think is 5/16ths

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everything is soldered with plumbing solder and leak tested. here's a good shot of the flare to an fittings from summit.

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here's what i have so far, all the lines (not cut to length) and the filter i will be using (caution this filter is over a foot long) everything is 8an from the y block up including the rail. i will be using a magnafuel fuel pressure regulator as i was not impressed with the aeromotive one i had been using in the past.

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questions, comments, personal experiences......for reference i'm planning on an fp3065 for the setup at the moment.

oztofrdm · Aug 7, 2006

Tho just running an extra inline 255 would be way easier to setup and is what im gonna have to do pretty soon. Heres a local supra owners fuel pump setup that you might be able to gets some good ideas out of.

http://performancefreaks.com/pictures/fuel_pump_assembly1.JPG

http://performancefreaks.com/pictures/fuel_pump_assembly.JPG

desolateboosted · Aug 8, 2006

Man I wish someone has already done the r&d and is making dual fuel pump assemblies to drop right into a dsm. I'd buy one right away and I know they'd sell tons.

NitrousBob · Aug 8, 2006

Just go with an 044 bosch pump from that jay racing. Flows enough for big stuff and is factory part so it will last. I mounted mine outside the tank with a -8 pickup. and 1/2" aluminum line to the front.

speedmaster747 · Aug 8, 2006

oztofrdm said:
Tho just running an extra inline 255 would be way easier to setup and is what im gonna have to do pretty soon. Heres a local supra owners fuel pump setup that you might be able to gets some good ideas out of.

http://performancefreaks.com/pictures/fuel_pump_assembly1.JPG

http://performancefreaks.com/pictures/fuel_pump_assembly.JPG

Yeah, I have seen that one on www.wotm.com, pretty sick to have Three pumps inside the tank!

speedmaster747 · Aug 8, 2006

desolateboosted said:
Man I wish someone has already done the r&d and is making dual fuel pump assemblies to drop right into a dsm. I'd buy one right away and I know they'd sell tons.

In my first post, I mentined this guys www.shearerfabrications.com , they have done the custom stuff for shep!
It looks like they have it for the eclipse, I just have not been able to cantact them! :thumb:

desolateboosted · Aug 8, 2006

If you find out any more info about that dual pump design from them let us know!

tstkl · Aug 11, 2006

I too am leaning towards the inline 255, but I think the dual in tank pumps would be a cleaner install and, if someone sold the unit itself, much easier.

as for the aeromotive, you have to sump your stock tank if you want to use that (or whatever its called) and thats just plain annoying/hard. If I were to buy a fuel cell it wouldn't be bad, but keeping the stock tank really destroys the practicallity of the aeromotive fuel pump.

I was thinking a supra pump in the tank, and a 255 inline to go with it, but if I could just slap two quiet supras in the tank, I wouldn't have to worry about one pump limiting the flow of the other (if a pressure based system is used where the 255 doesn't turn on until x psi) since they both have their own intakes. As for one pump failing and your engine being destroyed, thats what a wideband o2 sensor is for, and also, how often do you hear about fuel pumps failing? with both pumps rewired using supra pumps (if its reliable enough for toyotas original equipment....) I don't see any major problems. I would be more worried about the inline 255 than a dual supra pump set up.

Slippi84 · Aug 12, 2006

Anyone ever hear of or try the inline pump that Zex makes? I have a turbo setup that can push my walbro 255hp to it's limits and on top of that some squeez and I saw zex had a inline thing is if it isn't gonna do jack why even bother with it. Like just cause you put a pump inline with the system if it's not raising pressure or atleast toward the end of the system restoring pressure then what good is it.

krnbk2 · Aug 12, 2006

tstkl said:
as for the aeromotive, you have to sump your stock tank if you want to use that (or whatever its called) and thats just plain annoying/hard. If I were to buy a fuel cell it wouldn't be bad, but keeping the stock tank really destroys the practicallity of the aeromotive fuel pump.

I talked to an Old school muscle car guy about this and he said you dont actually need to run a sump in your tank to run the aeromotive. when he builds his drags cars and switches them out to fuel injection he uses the big aeromotive pumps. what he does for the guys who want to keep the stock tank is he runs a syphon line into the stock tank down where the OE pump would sit and connects it to the aeromotive outside of the tank. sounds plausibile

gamingguru · Aug 12, 2006

Kinda like this:

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Well, you get the idea.

herblove · Aug 14, 2006

krnbk2 said:
I talked to an Old school muscle car guy about this and he said you dont actually need to run a sump in your tank to run the aeromotive. when he builds his drags cars and switches them out to fuel injection he uses the big aeromotive pumps. what he does for the guys who want to keep the stock tank is he runs a syphon line into the stock tank down where the OE pump would sit and connects it to the aeromotive outside of the tank. sounds plausibile

That is how I have mine. I extended the stock fp assembly tube down to where a walbro would sit an welded a 90 degee bulk head on the top and ran the line down to the aeromotive pump which is bolted to the front of the gas tank. The only problem is that when the guy welded the bulk head on the top. He turn it the wrong direction. So when it was put back in it mess up my float. Now my fuel gauge doesn't work. I looking for another fp assembly and I going to run a 255 walbro to the aeromotive inline OMG

I have heard that the aeromotive will fail if it isn't position right where has fuel drafted to it. I heard the aeromotive is a push style pump and not a suck style. Can anybody correct me if am wrong

Dark_Horse · Aug 14, 2006

You could always run a Bosch 044 in tank with a 1G. If memory serves me correctly, it's 330lph which should more than meet your needs.

With a 2G, you've got to mount the 044 underneath the car and let gravity prime the pump for you.

Slippi84 · Sep 18, 2006

Why would there be risk in running a walbro 255 inline with a walbro 255 intank??? I saw this http://cgi.ebay.com/ebaymotors/WALB...ryZ33555QQssPageNameZWDVWQQrdZ1QQcmdZViewItem auction on ebay and thought it would be perfect for anyone who was lllokin for a security blanket when touching up around 500whp.

Rick@AP · Sep 18, 2006

Slippi84 said:
Why would there be risk in running a walbro 255 inline with a walbro 255 intank??? I saw this http://cgi.ebay.com/ebaymotors/WALB...ryZ33555QQssPageNameZWDVWQQrdZ1QQcmdZViewItem auction on ebay and thought it would be perfect for anyone who was lllokin for a security blanket when touching up around 500whp.

In all honesty I think it is a waste.

I just came from the dyno on Sat where my car put down 536 whp on a stock Supra TT pump and stock lines. No fuss, no mess on the install. It took me all of 15 min to install on the stock fuel pump cradle.

I now have to upgrade and I'm trying to decide which way to go. I don't like the external pumps as they are loud and prone to failure. Not to mention the fact that the 2g's have plastic tanks which means sumping the tank isn't possible without doing something crazy. Fuel cell is out as this is a daily driver. I would rather have dual in tank Supra pumps which would be much quiter and hopefully less work.

I know someone has done twin in tank pumps before because I remember seeing the pictures of the unit ready to install. I just wish I could find those pictures.

DSMunknown · Sep 18, 2006

Rick@AP said:
In all honesty I think it is a waste. I would rather have dual in tank Supra pumps which would be much quiter and hopefully less work.

What about considering Barry Grant?

http://www.barrygrant.com/bgfuel/default.aspx?page=44

Rick@AP · Sep 18, 2006

DSMunknown said:
What about considering Barry Grant?

http://www.barrygrant.com/bgfuel/default.aspx?page=44

I would still have to sump the plastic tank some how to use this or find another method to make sure the pump is always primed.

Two Supra pumps I think would be easier, either that or go with a dual nozzle methanol system.

DSMunknown · Sep 18, 2006

I highly doubt this would be applicable to DSMs, but anyone remember this from the April 2004 issue of Modified Mag? Here is another similar link.

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I forget how they actually made this work, but supposedly the second pump allows for more fuel when the car is put under hard load.

Slippi84 · Sep 18, 2006

Rick@AP said:
In all honesty I think it is a waste.

I just came from the dyno on Sat where my car put down 536 whp on a stock Supra TT pump and stock lines. No fuss, no mess on the install. It took me all of 15 min to install on the stock fuel pump cradle.

I now have to upgrade and I'm trying to decide which way to go. I don't like the external pumps as they are loud and prone to failure. Not to mention the fact that the 2g's have plastic tanks which means sumping the tank isn't possible without doing something crazy. Fuel cell is out as this is a daily driver. I would rather have dual in tank Supra pumps which would be much quiter and hopefully less work.

I know someone has done twin in tank pumps before because I remember seeing the pictures of the unit ready to install. I just wish I could find those pictures.

I got the walrbo 255hp for 80 shipped supra pumps are 150 ball park so that explains not getting the supra pump, and the walbro 255 is good for 500 but like it's been said that's like the ragged edge. Knowing that how can you say it's waste to get a extra pump when your engine will go if you starve it at the wrong time :confused:

Rick@AP · Sep 18, 2006

Slippi84 said:
I got the walrbo 255hp for 80 shipped supra pumps are 150 ball park so that explains not getting the supra pump, and the walbro 255 is good for 500 but like it's been said that's like the ragged edge. Knowing that how can you say it's waste to get a extra pump when your engine will go if you starve it at the wrong time

I'm not saying an extra pump is a waste. I think that installing two of those in line with each other is a waste. If your going to install something in line with the existing pump, I would go for a real pump such as the Bosch 044. The output flow should be greater than what you suggested.

wishihadatalon · Sep 18, 2006

Rick@AP said:
In all honesty I think it is a waste.

I just came from the dyno on Sat where my car put down 536 whp on a stock Supra TT pump and stock lines. No fuss, no mess on the install. It took me all of 15 min to install on the stock fuel pump cradle.

I now have to upgrade and I'm trying to decide which way to go. I don't like the external pumps as they are loud and prone to failure. Not to mention the fact that the 2g's have plastic tanks which means sumping the tank isn't possible without doing something crazy. Fuel cell is out as this is a daily driver. I would rather have dual in tank Supra pumps which would be much quiter and hopefully less work.

I know someone has done twin in tank pumps before because I remember seeing the pictures of the unit ready to install. I just wish I could find those pictures.

I have them on my home computer. I will do my best to post them tonight.

Also as stated before why not runa bosch pump in tank? I have seen it bolted in the stock spot and it looks clean. I guess the noise might be a little high but you could always turn up the radio

4wd-Eclipse · Sep 18, 2006

I may go for Jay Racing -8AN Bosch Fuel Feed System Kit ($520) with stock rewired 1G pump ...

http://www.jayracing.com/products.htm

Rick@AP · Sep 18, 2006

wishihadatalon said:
I have them on my home computer. I will do my best to post them tonight.

Also as stated before why not runa bosch pump in tank? I have seen it bolted in the stock spot and it looks clean. I guess the noise might be a little high but you could always turn up the radio

The pics would be appreciated.

From everything that I have read, the Bosch 044 is only slightly better than the Supra pump. If I were going to use one it would definitely have to be as an inline pump.

Right now, my thinking is to either figure out a way to make a dual pump work or go progreesive methanol injection with two nozzles.

Slippi84 · Sep 19, 2006

WHy blow 200 bucs on a bosch when you only need a little more breathing room?

tstkl · Sep 19, 2006

WHY THE HELL IS EVERYONE AGAINST THIS IDEA?!?!?!??!?!??!

I got a good idea from my friends janky ass car the other day. He ziptied his fuel pump to his assembly, and I realized, if you take two fuel pump assemblies, cut the bottom part off, weld them together so they have lower supports, and then just ziptie the pumps to the assembly really well and drill a second port for the second pump. The reason why the zip tie works is because he had a layer of foam around his fuel pump, which allowed the zip ties to hold the pump tight without slipping up or down. I'll probably end up simply doing that. Two supra pumps with 6 an- fuel lines joined to a 8 an- main fuel line with a 6 an- return would be perfect for me (and almost anyone else too probably)

Defiant · Sep 19, 2006

I don't get it. If you need a bigger pump, why not just install a bigger pump? Is there something I'm missing here?

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Dual intank fuel pumps

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krnbk2

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