320 to a 325

[wells696]

Apart from the engine wat else do i have to change to get the car running i want to keep a 320 diff and gearbox thou for betta pullaway or is that crap how long would it take routhly to change the engine and if i throw some money sum1 would they fancy giving me a hand in bmth area preferably with some experience

[surj]

u will have to change ecu and airflow aswell my mates just done this conversion and is is rapid with the 320 diff and box it pulls very well

[liquid079]

Yep I've just put a 2.5 in my 320i and kept the standard box & it accelerates very nicely, a bit high reving on the motorway but i would rather have the acceleration.

I threw away the oil cooler as i didn't think it was neccesary, and replace these old engine and gearbox mounts.

Mine took me 15 months and is still not MOT'd but I was lazy had some problems with the engine and done little bits at a time. If you were fully prepared I expect you could do it in a long day.

[Brianmoooore]

Later ECUs are actually the same except for the chip, so, if you were going to fit a zone chip anyway, you can keep the original ECU.