I found a M3 Motor for my 325i!!

[jrhaile]

I found a 98 m3 motor with only 45k miles on it... the place wants 1800 for it so I'm not going to tell people where... I have a question though... will I need to change my computer or anything in order to make this swap? don't say go to bavengine or whatever because they never respond... I already have a m3 diff, tranny, clutch... I know I'll need new mounts, but will I need anything else?

[jllphan]

Yes you will need to replace your DME and harness.

[bigred318]

is the 45000 on a rebuild or not, thats sooo cheap nice find! as for the cumputer i htink you will need a new one but wait to hear from someone that know sfor sure

David

[jrhaile]

shit... don't want to replace my dme or anything like that... what if I got a m3 engine from the same year as my car or lower? then would I have to change it

[jrhaile]

Also it's not on a rebuild engine... it's original miles. reason for so low, the backend was damaged in a wreck. the guy is just parting it, he turned it on and revved it for me over the phone lol..

[t0pk0w]

each motor is very different electronicly so yes you would have th chang the ecu and harness the 325 ecu is designed to deliver fuel to a 2.5 lt motor so i would not no what to do and i imagine the ignition systems are very differnt also

[jllphan]

Yup, like i said, and t0pk0w discussed, ya gotta replace it. The values for the motronic, fuel curve, etc. are different. ///M3 engine swaps aren't easy or cheap.

[007ben]

Don't replace the DME go straight for the ODBI conversion...

[Turbodefrost]

But getting a working engine for that price definitelly helps!!

[jrhaile]

my car is already odb1? :P

[007ben]

but not the m3 engine.

[phenom]

You may also have to change you central locking system (about $450) I had to do it on my m42 to m50 (M3) conversion, but it may be different for a M50 (328) to M50 (M3) conversion.

[d3ity]

btw jrhalie...NICE CAR.

[bigred318]

yeah dont worry about having to buy a new ecu since that engine should go for about 4-6 grand buying an ecu wont kill you haha

DAvid

[brien4787]

you could always buy it and resell it..-