Dual pumps in AWD tank.anyone got pics?

[turboglenn]

Ive searched google and the site since starting my AWD swap and all i find is the full blown which i cannot get (no money) or inline pumps (also cvan't afford) already have dual intank pumps from my FWD tank, and although i have read that it can be done can anyone get me a pic of how they put two pumps into a 2g AWD tank ?

thanks!

 

[deth2u]

It's a lousy situation to be in, I've thought about working around it, but I'm probably going to install a fuel cell in the spare tire bay. That might require some crash bars to the rear towers so the car doesn't relive the Pinto experience.

The 2g tank is plastic. If you're handy with a plastic welder, you can maybe install some large plastic/abs/whatever material fittings and a crossover hose, while just putting a T on the returns and removing the siphon tube

But fair warning: welding plastic is very difficult. I'd say it's just as difficult as learning to weld again from scratch

That's the best idea I could come up with aside from shit-canning the tank entirely.

 

[nfernotalon]

I'm not sure how hard it would be to swap in a 1g tank or even possible but it's an idea.

 

[97gst_spyder]

This epic thread may help.....

http://www.dsmtuners.com/forums/bolt-tech/348587-dual-tank-255hps-2g-quad-fuel-pump-setup.html

 

[turboglenn]

It's a lousy situation to be in, I've thought about working around it, but I'm probably going to install a fuel cell in the spare tire bay. That might require some crash bars to the rear towers so the car doesn't relive the Pinto experience.

The 2g tank is plastic. If you're handy with a plastic welder, you can maybe install some large plastic/abs/whatever material fittings and a crossover hose, while just putting a T on the returns and removing the siphon tube

But fair warning: welding plastic is very difficult. I'd say it's just as difficult as learning to weld again from scratch

That's the best idea I could come up with aside from shit-canning the tank entirely.

Well, if i could come up with a spare pump/sender assembly i could do like i did on my GST and make a custom hanger ane move things around a little (or maybe put pumps on one side and a GST sender on the other), it it weren't for the GST being a bolt down type and the GSX being the thread on cap i'd have just put my GST setup in there and been done but i will figure something out

I'm not sure how hard it would be to swap in a 1g tank or even possible but it's an idea.

after the AWD swap i'm done swapping things for a while

This epic thread may help.....

http://www.dsmtuners.com/forums/bolt-tech/348587-dual-tank-255hps-2g-quad-fuel-pump-setup.html

Sadly that thread has only links to the Full blown setup which i can't afford (or could make if i had a big piece of billet AL) and a link to my thread when i did my GST . looks like i'm on my own on this one

I've even though about drilling a hole to the back side of the baffle (opposite of where the sender arm reaches) and putting a bulkhead in the tank body and hanging a pump in there seperate from the hangar assembly, but only time will tell what i actually do, like i said if i could get a spare pump hanger for an AWD i'd be set and just make my own moving things around to fit, i'm sure i'll find something to work with, i'm just too behind on making money to worry about it for now, the car runs, it's not gonna go lean if i keep the boost low on one 255HP so i'll be ok in the mena time

 

[97gst_spyder]

If you can get to the ECMLink forum there are people modding the senders for 2 pumps. From what I've seen the awd sender is much shorter and less space in the tank to mess with.

 

[turboglenn]

i can't seem to get on there, guess cause i don't own an ECMlink but i've heard there's tons of into there on this idea

 

[turboglenn]

Well, due to the leaking o-ring style setup on the OEM hanger i'm abhout to pull it out and TIG in a piece of 3/8ths hard line to allow me to use fuel line and hose clamps to secure the pump, while i'm at it i'm going to try and add the second pump, hopefully i'll be able to be the first to bring this writeup to the tuners forum and give others an idea/directions to use to help save them the 500 bucks the full blown unit costs

I'll report back in about 2 hours

Well, I didn't go dual as i found a solution that was way too easy. there wasn't enough room for making the 2nd pump without making a lot of noise (and there's people sleep[ing that have to work at 4am here) So i sealed the pump up with the hose i was gonna use to secure it to the line i had planned top weld into the hanger after removing the OEM one

While trying to figure out how to remove the female flare part i found another way to do the job that's way better than an o-ring. While i was at it i I drilled the inside of the flare to 8mm which is the same size as the inside of the hard line on the outside of the hanger (every little thing helps in the big picture is oneof my standard rules to live by)

This is the push lock style -6 hose from aeroquip or earls (can't recall) and it was such a tight fit intot he flare without the pump i immediately knew this was my ticket to a leak free pump.

I cut a short piece and put it on the pump with a hose clamp, then lubed it up and forced it up into the flare union, it took a LOT of force and twisting to get it in there with the pump in the inner area so i'm sure this should be good to go.. i'll work on the 2nd pump once i find out where this pump falls short on flow
**on a side note i have used this blue line as my fuel line and inside my GS-T tank holding in my dual pumps for a couple of years with no sign of deterioration from the ethanol/gasoline, really good stuff!

Here's the pump with the blue line clamped to it, (the blue line was trimmed level with the top of pump outlet and the second/top clamp was not used)

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and here's the pump inserted into the hanger.. I probably wouldn't even have needed a clamp to hold the pump on but i ended up putting one on anyway, this turned out tobe the simplest and probably the most effective seal for the OEM flare/sleeve i've seen to date.

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I'll have to update when i finaly get another 2g AWD sender or pump hanger to work with for making my dual setup, I've figured iut out but it's late and people are sleeping that work at 4AM and i need to be driving the car tomorrow so, this will be how it sits untill i get to running short on fuel supply again

_______________________________________
update

The fix worked perfect, as soon as i fired it up the AFPR needed tuned down a LOT, i was at 50psi at idle WITH vacum attached (this is the setting i had to use just to get the base 43psi without vacum yesterday with the leaking pump)

To my surprise the one wally is holding up well with the 1000's and allowing me to make 22-25psi (most i've tried) and keeping my AFR's right where they were before the swap (i'm thinking that when i had the single wally in the GST tank it must have been leaking too just not as bad which is why i wasn't able to keep the fuel demands of even my old 720 injectors met with it, i can only imagine how many other people out there are probably driving around with a pump that isn't sealing and causing them a lot of fuel flow to be lost, no pump i'vevever ordered (3 now for my own car) have come with any way to keep the o-ring up into place and to be honest i cna't remember the OEM pumps having the spacer thing i see in some of the write ups (of course the first GST pump was 12_ years back so my memory just can't bring that one back to me clearly )

I've decided that when i do mount the 2nd pump i'm not going to put it on the hanger, but rather drill a hole outside of the screwdown lid area that will still keep the pump in the baffled area, but more towards the passenger side door where it won't be in the way of the fuel sending unit, being that the tank is plasitic this should be really easy to mount up and get a good seal on in thisfashion.

I do have a question for those runnin dual pumps on a 2g AWD though, and that's will the siphon tube drilled to 1/8th inch be enough to allow me to keep the fuel pressure low enough for idle and decel conditions?