Author Topic: Flywheels: How light is too light? (Read 2103 times)

KenC · « **on:** March 27, 2009, 09:56:38 AM »

I'm contemplating putting an 11lb e21 flywheel in, but I'm concerned about the balance of the crank. How light can I go without having to mess with the harmonic balancer?

1991 E30 M42 · « **Reply #1 on:** March 27, 2009, 10:52:25 AM »

I am running a 9 pound MM flywheel, but I had my engine balanced with it.

redhead · « **Reply #2 on:** March 27, 2009, 02:25:11 PM »

I have this flywheel in my M20 and it is a great mod, I don't see why an m42 is any different as there are a few different light weight flywheels out there >10lbs for the m42 that are a straight bolt on. If your engine is not currently out of balance and the flywheel is straight, you shouldn't have any problems.

If you decide not to install the 323i flywheel please pass on the sellers information to me, as I am looking for another one.

Hodge · « **Reply #3 on:** March 27, 2009, 06:37:41 PM »

I have the 11.5lbs Lightweight on my M42 without any issues.