325i into 320i swap! INFO NEEDED!

[MarkF]

Hi guys. Looking for more power from my 1987 320i as its a bit lame. Ive had a few ideas, i.e. E36 engine but have decided that an E30 325i engine will probably be the easiest option. Can anyone tell me what exactly is involved. I know this subject has been done to death but would like some definate answers regarding wot i will need to do/source/change/modify etc.

I am assuming from reading thru the engine swaps forum for a good couple of hours that my gearbox and mounts will be ok. Wot about exhaust, wiring, ECU etc.

Any help will be much appreciated.

[Ant]

Motronic or Jetronic M20B20 dude ?

in English thats dizzy on the front ? or in the side by the AFM ????

[Silverfang]

Was thinking the same conversion too, Motronic M20B20 here.....

[daimlerman]

Easiest way is to use the management that you have at the moment,just swap it onto the doner engine.If you can locate a complete 325i,take the ECU as well.Exhausts are interchangeable between 2.0 and 2.5.Do have a read of the 2.8 threads that are current,with both engine sizes to hand you will have almost all the bits you need for a 2.8...not too much more effort for a very big gain....you will need to swap your diff,would expect that you have a small case 4.1,(6 bolts on the cover plate)you could do with a 3.64 or a 3.71 medium case(8 bolts on the cover) the bigger diff swaps in without any drama,the prop length is ajustable to suit.

[Silverfang]

Diff's been solved already - 3.91 LSD

Though would be thinking to do that 2.8 swap... just means getting a crank from a M52 B28? I'll have a read up on that 2.8 build thread to see what's what

[ric325i]

if your going for the easy swap just swap should just be the ecu that needs swaping. same age engine (as in face lift) and all is well. the rest will be the same.

hope you have a rear disc set up to go on it and that should be it. most simple swap you will do.

anyone think there is anything else to it?

[Silverfang]

Got drums at the back, but doing braided lines here all round, sides i put new shoes in only 6 months ago.

Was thinking of getting a 2.5 and giving it an overhaul anyway, just a good strip down, clean and re-seat the valves, maybe port match the head to the manifolds and see if i can get a decent cam and chip to sort the fueling out

[MarkF]

Cheers guys. My dizzy is on the front of the engine...