M2 Fuel Supply Question

[uxoman]

As most of you know I’m in the process of building an M2 and I’m now entering the fuel supply portion of the project and I have a few questions. I’m wondering what the pros and cons are of mounting a tii fuel pump inside the trunk when the battery has been relocated there.

I realize there is a possibility of a fire hazard in an accident, but so is the fuel tank. I would think the fuel tank is much more likely to rupture in an accident and spill the fuel and a fuel pump. I am considering mounting the pump in the trunk for the following reasons:

1. Easier to work on than under the car.

2. The fuel supply line and return line are there.

3. If I mount it under the car I would have to drill a hole from the trunk

to the pump then back into the car again.

I also plan on installing an inertia fuel shout off switch like the ones on modern fuel injected cars. They are designed to shut the pump off after an accident. They have a reset button so you can turn the fuel pump back on after and accident. I figure I can get one off a BMW at a local junkyard. I know of an E30 318 but does anyone know where this inertia switch is located in it?

[slash02]

People commonly pull them out of crown victorias.. our 1992 had one on the driver's side of the trunk. most EFI systems kill the pump when the engine isn't running, but still a good idea. Next time I'm PYPing, i'll grab a couple crown vic ones...

[JohnN]

the tunk on the driver's side. It is pretty slick with NO and NC connections. I mounted mine on the outside of the brace for the trunk lid (pictures if you want them). Out of the way and protected.

I'd suggest you use an E30 (1988+) fuel filter. You won't have to screw with the double pump setup and it drops right into your tank.

Cheers!

John N

[JohnN]

(nt)

[uxoman]

John can you email me those pics?

Thanks Phil

couchfam@hotmail.com

[BLUNT]

John can you email me those pics?

Thanks Phil

couchfam@hotmail.com

id appreciate if you carboned me also john, unkorama@gmail.com. thanks

[canadapierre]

John me too for pics please.... pondhopper@shaw dot ca cheers!

Phil, if you use the 88'+ pump, make sure you extend the pickup pipe as they are shorter that stock 02 pickup. I'm sure you want every drop of fuel for the thisty beast to drink...

[Guest Anonymous]

E30 in tank pump and a secondary underneath the car. My supercharged has 2 as well.

[uxoman]

According to Dave @ Aardvarc Racing the conversion requires an in tank pre-pump and an external pump. I believe the pre-pump is from an E30 and the main pump is from a tii for my application.

[bobthomas]

I'd like the pictures too. Sound like a good cheap upgrade. bobthomas18@hotmail.com

[bobthomas]

I think the E30 prepump should be from only a couple of years of e30s. I would tell you for sure but all my info is at a shop over 100 miles away while having my broken s14 engine repaired/rebuilt.

[JohnN]

(nt)

[uxoman]

Phil, if you use the 88'+ pump, make sure you extend the pickup pipe as they are shorter that stock 02 pickup. I'm sure you want every drop of fuel for the thisty beast to drink...

I did not have to extend my fuel pick-up pipe. I purchased a NOS (Now NLA) early tii tank and they are not as deep. The pickup actually sits on the bottom of the tank.

[NickVyse]

used a pump from a coupe

and since getting a Tii tanks that doesn't leak I've not had a problem!

[ray_]

Sorry, too far away from the car to tell ya my setup tho I know there is an in-tank pump. Any other pump I have must be external.

I really think u don't want to run a tii pump, especially in the trrunk. One small fuel leak on the outlet side would be a big and dangerous mess, they really flow a lot.

Cheers,

Ray