Author Topic: Stroker Options.. (Read 4065 times)

big kris · « **on:** November 03, 2007, 09:41:32 AM »

Hi all, I'm fairly new to BMW's (3 months) and I'm looking for some information for when I come to rebuild my engine. I would like to retain the M42 block, but aiming for a higher displacement. I know a lot of people are getting 2.1 litres so this is what I will aim for!

What length do the rods have to be if I use M3 pistons and an M47 crank? Would an M42 block be able to accomodate M3 Evo pistons or can the block not be bored to accomodate?

Any thoughts or information welcome!

Kris

christophbmw · « **Reply #1 on:** November 03, 2007, 10:53:30 AM »

go here:
http://www.metricmechanic.com
and read EVERYTHING they have to say about the M42. Extremely helpfull

.

tim_s · « **Reply #2 on:** November 04, 2007, 04:22:14 AM »

Kris, I replied to you on e36coupe, be sure in your posts to be clear what you mean - you mean UK M3 EVO, i.e. euro s50b32 to US guys, US M3 is not the same as UK, and has different pistons. pin height on euro s50b32 pistons isn't really ideal, also small end dia. is wrong. just buy custom parts, much more sensible in the end.

big kris · « **Reply #3 on:** November 05, 2007, 04:29:22 AM »

Ok cheers Tim!

Kris

tim_s · « **Reply #4 on:** November 05, 2007, 06:03:24 PM »

just read through this again, sorry didn't mean my post to be abrupt :S good luck with your engine!

kowalski · « **Reply #5 on:** November 20, 2007, 02:43:32 PM »

check my FS thread!!!:D