E30 Zone

It`s a 2.7 with the early high comp pistons. Not sure what head would be best and how much to machine it by. Any advice would be great. Cheers

If it early pistons from a 325i then a 325i head no machining of the head required, if its an eta bottom end then the 320i head, with the latter the valves and port sizes of the 325i would be an advantage.

The crank is the ETA one with 320 rods and 325 Hi comp pistons, so the 325 head it is then?

Yes the 325i is the one you need, the machining needs to be done to the block. It needs a skim of about 1.5mm. You will then need a vernier cam sprocket to time the cam correctly as it will now be wrong because the two wheels that the cambelt runs on are closer together.

Perfect, thanks for that, do you happen to know what the standard deck height is?

206mm for 325i block

206.5mm for eta block

Dosn`t get any better than that! Thanks very much.