Author Topic: M42 Fuel Requirements? (Read 3829 times)

ClayW · « **on:** February 28, 2011, 07:25:12 AM »

What are the M42's fuel pump needs (lph/gph and psi/bar)?

I am trying to select an external electric fuel pump. My M42 is going into a `67 1600 and the E30 318is in-tank pump fits, but is too short to pick up all the fuel in the tank.

Thanks in advance!

ClayW · « **Reply #1 on:** March 01, 2011, 07:42:14 AM »

Nothing? Does anyone know?

B318M42W · « **Reply #2 on:** March 01, 2011, 09:53:09 AM »

just modify the hanger and make it longer? find a good piece of injection hose that can be submerged into fuel (to replace the " orange box"), add the length you need to the hanger, add a collar to hold the pump in position and you,re basicly done

romkasponka · « **Reply #3 on:** March 01, 2011, 07:09:20 PM »

IMHO walbro 392 is the best choice, except Bosch 044

ClayW · « **Reply #4 on:** March 11, 2011, 09:34:47 AM »

Quote from: B318M42W;101884

just modify the hanger and make it longer? find a good piece of injection hose that can be submerged into fuel (to replace the " orange box"), add the length you need to the hanger, add a collar to hold the pump in position and you,re basicly done

Even if I can modify the pick-up, the fuel gauge won't be accurate.

B318M42W · « **Reply #5 on:** March 11, 2011, 11:23:00 AM »

how is the fuel level sender mounted in the tank in the 1600??

ClayW · « **Reply #6 on:** March 15, 2011, 09:54:44 AM »

Quote from: B318M42W;102175

how is the fuel level sender mounted in the tank in the 1600??

It's in-tank, mounting in the same fashion as the 318is pump. 1600's and 2002's use a mechanical fuel pump, so it's just the sender in the tank.

The E30 318is fuel pump works great for the conversion and drops right in; the problem is that the E30 pumps and senders are about an inch too short for the 2002/1600 fuel tank, leaving a gallon or two of unusable fuel in the tank.

pdxmotorhead · « **Reply #7 on:** March 15, 2011, 04:58:57 PM »

If you lower the pump, youll just have a 2 gal "reserve" ,, or I've lengthened the arm for the gauge before to change its range... You might check out a 318ti sender, its got 2 because the tank straddles the drive line...

Dave

B318M42W · « **Reply #8 on:** March 15, 2011, 11:57:12 PM »

just thought about something... i'm not sure if the E30 325 has an external fuel pump?
http://www.realoem.com/bmw/showparts.do?model=1413&mospid=47322&btnr=16_0181&hg=16&fg=15&lang=enUS #9 in the diagram. could someone clear that up???
pre-supply pump and then another pump???