engine swap Fuel Pump Question

[13]

Hey guys, im just wondering if the unit in my 74's fuel tank can be used as a sender unit so i can use an external high pressure fuel pump. If that is the case I am going to be really close to having my m20 fire before the snow flies.

[M3M3M3]

what "unit" is in your stock tank?  just the normal pickup and sender for the gauge?

 

replace it with a stock E30 low pressure pump and sender.

add stock E30 high pressure pump in trunk or in Tii location above the trailing arm.

 

or use the intank high pressure pump and sender from a later E30 for a single pump solution.

 

basically, just use the full stock E30 fuel system.

[13]

Yeah its just the sender and pick up in my tank. I was planning to use an intank e30 pump but the external pump I got was free and NIB so i was hoping to use that instead

[jireland2002]

use the complete in tank high pressure pump from the E30 318 twin cam (1990+).  It fits and has a return fitting.

[TurkisM2002]

use the complete in tank high pressure pump from the E30 318 twin cam (1990+).  It fits and has a return fitting.

 

Excuse the noob questoins, but I'm researching fuel deliv options for my M20 swap -- is there any modification to the pump needed? I've got a '73 2002. 

 

Thanks

[jireland2002]

NO the 318 pumpis a direct fit.

[TurkisM2002]

NO the 318 pumpis a direct fit.

 

 

Thanks J. Aside from the pump, is there anything else I'll need for fuel delivery?  I'm looking at the the parts diagram for the 318i and was wondering if I needed the sending unit and anything else. 

 

Thanks

Chris

[FB73tii]

It appears that the E30 sending unit (16141152266) is inserted into the E30 fuel pump carrier (16141180233). Here's a photo of the complete assembly:

 

 

--Fred

Edited October 18, 2013 by FB73tii

[M3M3M3]

yes.  you need the sending unit also.  it works fine with stock 02 fuel gauge.

 

and yes, all that stuff fits in that little hole in tank.  pump goes in first, then sender inserts into the top of the pump.

 

although the 1990 and later 318 pumps have a return fitting, the later 2002 tanks have a return pipe built into the top of the tank. this allows you to also use the e30 325 single high pressure pump that does not have a built in return tube.

 

down side to this setup is that the fuel pickup is a touch shorter than a 2002 pickup, so you lose about a gallon of gas worth of range if you care about that (i don't).  if you are creative, you can cut, add and weld the e30 pump pickup to lower it.

[TurkisM2002]

So which year is considered later? I have a 73. I noticed there's a short length of rubber hose coming out of the tank that is plugged. Not sure if this was a return at some point. 

[TobyB]

There's your return pipe right there!

 

t

[TurkisM2002]

Yeah that's what I figured. But it's capped!! I can't post pics in this darn app. I'll try to get one posted tomorrow.

[TurkisM2002]

[M3M3M3]

just capped because it is not being used.  pull the hose off, connect your return line and drop a 325 high pressure pump and sender in the tank in place of the 2002 sender.

[M3M3M3]

may be obvious, but DO NOT use the stock 2002 fuel lines inside the cabin for high pressure EFI setups.  run metal lines under the car along the frame rail on drivers side for both feed and return lines.