ok so i'm going to replace my fuel pump with a more powerful walbro 255lph pump but now im confused as to which kind to get... i have a ti with a swapped s52 so do i get one for an e36 m3 or a ti? and then where do i go to find one? I've looked for a while and havent found a kit for either model, can somebody lend me a hand plz :)

Ok first off your stock fuel pump should be more than adequate to supply your S52.

Second off, the M3 unit is same just the connectors are different for sending unit top for power and what not. You can use the M3 unit just trim the connector fittings.

So unless the unit in your car now is going out, the Walbro isnt needed. I think the stock unit puts out 4 or 5 bar max, but someone else can chime in with Bentley specs.

ya, my fuel pump crapped out. So you're saying that I can use either or and it would be fine I just may have to modify the connector for a six cylinder? Where can i find these? I have looked everywhere and can't find a kit for e36 model years

i wanna know this too. i'm mentally prepping for a swap in my ti, and wanna be prepared parts wise. stock ti pump will work for 6 cylinder?

A stock fuel pump is fine.

You can use any e36 fuel pump for all the stock engines whether its a 4banger or 6pot. The only time the pump needs to be upgraded if for FI.

ya, my fuel pump crapped out. So you're saying that I can use either or and it would be fine I just may have to modify the connector for a six cylinder? Where can i find these? I have looked everywhere and can't find a kit for e36 model years

Get a junk yard unit. I believe the Ti has a green top sending unit and the M3 or 328/325 has a blue unit? Cant remember.

Either way, you'll see they look almost identical. But once you get in there, you'll see the connector shapes are flip flopped. When I say connectors, i mean the molex connectors that plug into the top of the sending unit. Fuel pumps and assemblies are expensive so just buy one used. Should be able to get one from BMA or Bavarian Recycling for a decent price.

I've got two swapped tis (M50 & S52) both using the stock ti fuel pump without an issue.