Hi Norm
I must admit the m3 is a very nice looking little beasty!
Alright here we go mate!
I planned on doing a 86 88 2.05l, little polishing, lighter flywheel m40, same rods m42, Lower timing case m44, nothing special sort of thing just more fun!
And that went straight in the crapper!

I ordered a crank from uk m47d20 but I got m47 tu2d20, so I went to a friend of mine and now that problem is solved thanks to heat differential bonding and pinning! It's getting crack tested as we speak!
So to keep it squarer I went with 87 mm Pistons.
Also with these diesel cranks and there 17:1 compression are quite heavier than the 10:1 petrol so there might be a aluminium flywheel in my garage now.
Giving me 87 90 2.15l
So I looked at the head and the 7 mm stems (e30) of which a couple where damaged and did a bit of maths, if 33/30.5 is good for a 1.8 l what do I want for a 2.15 l and the answer was MORE!!!!
So there might be 6 mm ti 34/31.5 in the mail heading towards me now.
Looking at the s50 cam tray now.
All through this process I have been asking Ralph a lot of questions, bless his cotton socks he hasn't told me to get stuffed YET! Top guy.
So in conclusion to your question Norm
T. Your L. Bloody C.
Ps love your work on your car, every time I get stuck with my project I look at what your doing for inspiration!