323i head on 320i block

[seba]

My apologies if this topic has been delt with already, but i would seriously appreciate any help on this. I would like know if anybody has done this mod, if it worked and what was involved?

I've heard that the combustion chamber design as well as the valve sizes are identical, but that the actual ports are bigger on the 323i's head. Is this true?

and finally are the heads a straight swap? (eg. are water jackets the same?)

any help would be greatly appreciated.
kind regards

[handpaper]

AFAIK, they're both 731 heads and identical in every respect.

[E30Mark]

Identical heads on both the 320 / 323

Part Cross-reference

Part 11121277753 (CYLINDER HEAD) was found on the following vehicles:

E28: Details on E28
E28 520i SEDAN, Euro

E30: Details on E30
E30 320i TOURING, Euro
E30 320i CONVERTIBLE, Euro
E30 320i SEDAN, Euro
E30 320i COUPE, Euro
E30 323i SEDAN, Euro
E30 323i COUPE, Euro

E34: Details on E34
E34 520i SEDAN, Euro

[antony]

different cams tho.

323i cam has 260 degrees lift. so you should get some improvement.



Someone please correct me if I'm wrong.

[seba]

Thanks for the help. I'm tryin to see what my 320i can put down, naturally aspirated, before i go to a bigger motor/turbo. I'm tired of people always banging on about it not being able to make power, but i feel that that is a load of nonsense. Any motor can run healthy but some motors obviously, due to combustion chamber design etc, can make more power.

So with a combination of power and weight reduction i'd like to see what my car can do.i was thinking about individual throttle bodies but i'll see what the budget allows.

any suggestions? once again thanks guys