E30 Zone

ive got a old 320i engine im redoing and ive got a 325i head and i was wondering if i could put the head off the 325i onto the 320i block and if i can how much extra power if any am i going to get thanks andy

Might aswell change the whole engine.

The pistons are a different shape so after machining work it's not worth it

True, true. How much is a decent m20b25 these days?

I fitted one over a weekend with the aid of a hefty mate, engine crane and load leveller and that was into a car that didn't originally have an m20!

The 2.5 is an awesome engine though mine has a 4.1 diff and is a bit mismatched with it's hears i'd say.

Good luck dude.

Jai.

cheers guys i dnt ave the bottom end off the 325i engine. cheers 4 the help guys

Use the 320 head with a 325 inlet and tb.

ed325i wrote:Use the 320 head with a 325 inlet and tb.

What sort of power increase will this give over the std 320?

I have a 320 with a blown head gasket and have been given a good 320 head as a stop gap between finding a 325 or 525e lump.

Better off working the 320 up to a 2.7, much easier.

clubfx2 wrote:Better off working the 320 up to a 2.7, much easier.

You reckon. Tempted, very tempted.

JohnnyRob wrote:

ed325i wrote:Use the 320 head with a 325 inlet and tb.

What sort of power increase will this give over the std 320?

I have a 320 with a blown head gasket and have been given a good 320 head as a stop gap between finding a 325 or 525e lump.

I have read 12bhp

clubfx2 wrote:Better off working the 320 up to a 2.7, much easier.

If you are doing a 2.7 you would be better using a 2.5 pistons and head.

325i head, wont work on a 320i bottom end

2.7 is a different animal all together