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Fuel Pumps For Roundnose 4efte
https://www.ausmini.com/forums/viewtopic.php?f=23&t=10750		 Page 1 of 2
Author:  minimetoy [ Fri Sep 02, 2005 9:30 pm ]
Post subject:  Fuel Pumps For Roundnose 4efte
Guys,

Thought I would Post a picture of my fuel pump set up. The mini has twin tanks, each tank has a low flow that feeds into the surge tank and then a VL pump to feed the motor.

The low flows will be individually switched (can use which ever tank i want when ever (a bit of a W**K really)) and the VL will be controled by the computer.

Image

Dan
Author:  JC [ Fri Sep 02, 2005 9:54 pm ]
Post subject: 
Looks fekin sweet, I want one. Where are you plumbing the return line to given you have twin tanks? Also, are the low flow pumps the thing above the big fuel pump? Have they only become necessary because you are using the surge tank?

Any more pics of the motor in the bay?
Author:  minimetoy [ Fri Sep 02, 2005 10:13 pm ]
Post subject: 
The return line will probably go back into the LHS tank. I suppose i could put a solenoid in that could switch the flow of the return line from tank to tank.

Yeah the two box looking things above the EFI pump are Facet solid state pumps. And yes the low flows are needed to feed the surge tank, they can run dry for periods of time without burning out like an EFI pump, this is good when cornering hard. I would be interested if Brad has had any issues when cornering hard on low fuel?? I rember seeing his pump located on the rear subframe.

The efte is stillin the halfcut (yeah i know i m slack) but the wife and kids have had a bad case of the wog for the last two weeks. I have given myself the target of having it out by next friday ( and hopefully sitting in the mini next weekend).
Author:  BLACKRZ_667 [ Fri Sep 02, 2005 10:16 pm ]
Post subject: 
That Looks COOL!!
Author:  awdmoke [ Sat Sep 03, 2005 10:08 am ]
Post subject: 
Agreed 8)
+ bonus points for the nice clean layout
Author:  minstar [ Sat Sep 03, 2005 10:34 am ]
Post subject: 
Man that looks like a race car. Sensazionale...I would like to do something using both tanks but this looks way out of my league...
Author:  cazmo [ Sat Sep 03, 2005 7:16 pm ]
Post subject: 
couldn't you just plum the return line back into the surge tank?

saves you having to modify you fuel tank.
Author:  minimetoy [ Sat Sep 03, 2005 7:51 pm ]
Post subject: 
Yeah, your right, I will fit the return line to the fixed nipple (top) on the LHS of the surge tank.

Each pump has a fuse and the VL pump has a relay located on the board. All the wiring is behind the board. The board is easy to remove with all the wiring running back to a single plug.

Thanks for the great comments.

Dan
Author:  92 [ Sat Sep 03, 2005 8:34 pm ]
Post subject: 
Yep your return line from the engine should run to the surge tank otherwise your injection pump will drain the surge tank before the pickup pumps will fill it. Then an over flow pipe from top of surge tank to the fuel tank
Author:  minstar [ Sun Sep 04, 2005 12:23 am ]
Post subject: 
Does that mean that no matter what you need a second entry into the tank to take the return line/overflow line...
Author:  JC [ Sun Sep 04, 2005 12:37 am ]
Post subject: 
Yes.
Author:  Baracade [ Mon Sep 05, 2005 12:12 am ]
Post subject: 
Very Impressive...

I'll have to show you guys what I am doing with mine...

But Very sweet & very impressed..... Well done!!!!!!!
Author:  Besser [ Mon Sep 05, 2005 7:21 am ]
Post subject:  repositioning the regulator
Thought you might like to consider not running a return setup.

Here is the setup im fitting to my VTEC

Move the regulator from the fuel rail end back to the pump (subaru B4 on mine) on a tee
At the fuel rail run the open end back around to the start of the rail to form a "loop" to reduce pressure variations across the rail (this is better then the std system) you could almost run a splitter union and have 4 individual hoses (good bling)

The regulator now has a very short return or can sit in the surge tank. You dont need extra lines and the setup gets easyer to remove.

If you run the surge tank low in the car (in the sub frame cavity) you dont need lift pumps as the Mini tanks are really mounted quite high in the overall picture. You can use std tank out feed and boot floor holes.

Finally surge tanks dont need to be be huge and I like the diameter your running. Most people fit surge tanks with enough volume to drive 20klm, I recon thats one hell of a long corner.

Can remember how many people I come across who relate the surge tank to getting every last drop of petrol out of the tank before running out. They tend to fail to realise the crap (water and other non solid impurities) that sits at the lower regions of the tanks. On EFI cars an injector can block to easily to use a surge tank like a reserve setup.
Author:  Metalfab_101 [ Mon Sep 05, 2005 8:06 am ]
Post subject: 
Top job. The best part I think is the bit you don't see (the wiring). Makes it a lot easier when you can unplug 1 thing to take it out.

The best way to feed those Bosch pumps is by gravity. How you have the surge tank setup should work fine, just plumb the EFI pump in on the lower fitting.

You should be able to fit 1/2" fuel line on the inlet side of the EFI pump, this will ensure you don't have any restriction on that side. I would also fit a 1/2" inline filter between the surge tank and the EFI pump too (cheapo see through in line types are the go). Not 100% neccessary as you should have inline filters before each of your solid state pumps. These are in addition to the high pressure filter between the EFI pump and the fuel rail.

Having said all that, I would try something completely different for a start. Put a 1/2" fitting in the bottom of each tank. Mount your EFI pump lower than the bottom of the tanks (eg, on the subframe). Run a 1/2" hose from each tank, through a filter and into a T piece. The outlet of the T goes to the EFI pump. Then HP filter etc etc. Return line would run to one of the tanks. Simpler, easier, less weight, less wiring to go wrong, less fuel pumps to die.
Author:  minimetoy [ Mon Sep 05, 2005 12:27 pm ]
Post subject: 
Yeah each low flow has a inline filter already fixed to them (the long funny looking thing) and i have a clear glass type for the EFI pump.

Thanks
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