M42club.com - Home of the BMW E30/E36 318i/iS

DISCUSSION => Engine + Driveline => Topic started by: Janne on June 19, 2009, 09:54:33 AM

Title: Lighter flywheel
Post by: Janne on June 19, 2009, 09:54:33 AM

My car is e36 318is with aircondition. Does m20b25 flywheel and clutch-kit pass to my car. Is this good way to get lighter flywheel and clutch packet? I think this stuff is about -5kg lighter than the original doublemass flywheel and clutch kitt.

Title: Lighter flywheel
Post by: DesktopDave on June 19, 2009, 10:22:41 AM

I think you can use the E30 M40 no a/c flywheel instead, it's a cheap single-mass alternative.  The M20 flywheel has a different gear pitch so your starter won't work.  Also the flywheel is lighter but the clutch is heavier, you end up saving only ~2kg.

Title: Lighter flywheel
Post by: 1991 E30 M42 on June 20, 2009, 01:20:02 AM

An m20 flywheel is well worth it, they can be lightened alot, mine weighs 9 pounds, as for the starter, you can have the flywheel machined to accept an m42 starter ring or put an m20 starter gear on your m42 starter. As for an m40 flywheel, I do not know if it will fit. On my other car, I have an M42 non ac flywheel that has been lightened to 17 lbs and it is a very nice set-up.

Title: Lighter flywheel
Post by: Janne on September 25, 2010, 08:03:03 AM

Finally get this m40\m42 solid flywheel 6.4kg. :cool:

http://s303.photobucket.com/albums/nn158/Janne87/?action=view¤t=V-pyr008.jpg

Title: Lighter flywheel
Post by: M42_Jester on September 25, 2010, 11:12:51 PM

+1 very interested in this. looking at doing the same thing...
keep me in the loop :)

Title: Lighter flywheel
Post by: deekay on September 26, 2010, 09:13:41 PM

i went with the M42 non-AC flywheel & a "stage 2" clutch from SPEC last month. 8lb difference and it was a straightforward remove & replace.

Title: Lighter flywheel
Post by: johna on September 27, 2010, 04:08:28 AM

A bit of info on the M40 flywheel conversion here: http://www.motortraders.net/groups/group.asp?group=1&menu=1&article=18 (http://www.motortraders.net/groups/group.asp?group=1&menu=1&article=18)