M20 flywheel Weight question

[DeM3n]

I just bought a flywheel from another member off this forum. He said it was a "I" M20 flywheel. It weighs 25lbs and looks kinda thick. Is this normal weight for this kind of flywheel. Or was he mistaken and its actually a dual mass flywheel? Can anyone help?

[Digitalwave]

That's normal. The dual mass fly is more than that.

[nickmp0wer]

i thought normal was 16 or something

[ColdAccord]

i thought it was 18

[PeaveyBassist]

I thought 16 as well for the m20b25 flywheel. I thought m42's were 25 pounds.

Will

[Digitalwave]

No. My flywheel was either 22 or 24lbs on an inaccurate scale (I don't remember exactly). My machinist got it down to 15lbs after lightening.

[2002maniac]

I thought it was 5?

[PeaveyBassist]

I thought it was 5?

Do I sense somebody being a smartass? ;)

Will

[Beej '86 325es]

My single mass was 24 lb., I had it lightened to 12.

[DeM3n]

Really... damn. The guy said that he bought it off another guy on this forum and that it came off of a 323i.... I'm not too familiar with the flywheels for the M20 and M42's.... how different are they? The guy I bought it from guaranteed me it was an M20 flywheel though.... but looking at some of the responses I'm thinking he might be right.

[nitro325is]

I just weighed some Ive got laying around.

Single mass from M20 B25 = 18lb 10.5 oz

Dual mass from M20 B27= 23lb 9.5 oz

Yes my scale is very accurate use it to ship my ebay auctions.


BTW Ive still got that M20 B25 fly for sale.

[DeM3n]

Hey nitro. I'll take that M20 B25 flywheel today. I'll even pay the bit extra for 2 day shipping cause my engine should be here really soon! PM me w/your paypal account (if you have one) and we can work it out. I believe you were asking $60 shipped. Let me know!

[nitro325is]

Flywheel

edit: PM sent