325 running gear in a 320

[eamo]

hi all just bought a 1988 320. Im putting a 325 engine etc into it. What do I need to replace on the 320 to make the 325 run??

ecu? fuel pump? tank ?? etc ect????

[craigieeb]

nothing, just a plug and play jobby,

you could do the rar end change, convert from drums to disc's, just for that extra sopping power

[Templ8e30]

You'll need the 325i ecu and Airflow meter, apart from that it's just plug and play.

Cheers,

Iain t

[jonbuoy]

Ugrade the brake's mate.
Some early 320's have solid disc's on the front and the smaller strut's (45mm small-51mm big strut's) with drum's on the back
Also don't know if you need to change the coding plug in the cluster's?

[stevetigger]

Also don't know if you need to change the coding plug in the cluster's?

No, six cylinders!

Coding plug change is for six to four or four to six cylinders!

[Brianmoooore]

If you're changing to the 325 gearbox as well, then you'll need a 325 prop. 320 gearbox fits, and has better ratios, but is supposed to be weaker.
320 diff is a bit high ratio for a 325 as well.

[Martinaston]

Anti roll bars and bigger rad ?

[Templ8e30]

Anti roll bars and bigger rad ?

Rads are the same as is the front anti-roll bar but most 320i's dont have any rear anti-roll bar so it's a good idea to fit one

Cheers,

Iain T

[eamo]

right

so basically I need engine, prop, gearbox, clutch, air flow meter and diff

defo gonna change the rear axle as well for disks and get rid of the drums.

Do i need to change brake/clutch master/slave cylinders as well with the disks on the back?

How about the fuel pump? Is the manifold the same of do I need to change that as well??

[stevetigger]

Fuel pump will be fine

Manifolds should come with doner car or engine!

Brake servo and M/C will be fine but you will need extra pipes for the discs, im sure drums are cables

[Brianmoooore]

im sure drums are cables

?????!????

[stevetigger]

im sure drums are cables

?????!????

Its OK I was thinking of the handbrake

[Brianmoooore]

Handbrake cables for disc rear axles are different than those for drums, IIRC.