Lightweight single mass flywheel options... go!

GenXG87 · 01-21-2024, 02:49 PM

How much does the stock flywheel weigh?

What are the options for a lightweight flywheel?

Are these cars really twin disc from the factory?

I have experience with C4 and C5 Corvettes moving from dual mass to single mass. Huge performance improvements at the cost of some marbles in the can rattles at idle. That swap was about 20lbs reduced drivetrain mass. The rule was 1lb reduction in rotational was equivalent to 15lbs weight reduction.

The only thing I've found is this:
https://www.bimmerworld.com/Drivelin...M3-G82-M4.html

Please share thoughts and links.

RockCrusher · 01-24-2024, 08:35 AM

I'd be leery of going to a single mass flywheel if the engine came with a dual mass flywheel. The DMF besides provided clutch cushioning serves to dampen crankshaft torsional stresses. This also reduces stresses to cam drive system.

With a SMF, to provide the clutch cushioning the friction disc needs something -- like springs -- which makes for a heavier friction disc. And if the clutch is twin disc then both discs are heavier.

01-21-2024, 02:49 PM	#1
GenXG87 Private First Class 179 Rep 127 Posts Drives: 2023 M2 & 2018 M2 Join Date: Apr 2023 Location: Savannah, GA iTrader: (0) Garage List 2023 BMW M2 [8.50] 2018 BMW M2 [9.75]	Lightweight single mass flywheel options... go! How much does the stock flywheel weigh? What are the options for a lightweight flywheel? Are these cars really twin disc from the factory? I have experience with C4 and C5 Corvettes moving from dual mass to single mass. Huge performance improvements at the cost of some marbles in the can rattles at idle. That swap was about 20lbs reduced drivetrain mass. The rule was 1lb reduction in rotational was equivalent to 15lbs weight reduction. The only thing I've found is this: https://www.bimmerworld.com/Drivelin...M3-G82-M4.html Please share thoughts and links. __________________ 2023 G87 ///M2 6MT - Ohlins R&T, Vorshlag Camber Plates, Fall-Line Rear Toe Arms, APEX VS-5RS, Conti Extreme Contact Force, JB4, IRL single mid-pipe 2018 F87 ///M2 DCT - MPE, BM3 stg1, MAD Intake, xHP stg2, M4GTS Diff/Steering, Euro MDM, Ferodo 3.12, APEX VS-5RS, Potenza RE-71RS, Cobra Nogaro IG: Follow ME: genXg87
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01-24-2024, 08:35 AM	#2
RockCrusher Major 1221 Rep 1,168 Posts Drives: BMW 2023 ZB M2 6-speed Join Date: Jun 2022 Location: Benton County, AR iTrader: (0)	I'd be leery of going to a single mass flywheel if the engine came with a dual mass flywheel. The DMF besides provided clutch cushioning serves to dampen crankshaft torsional stresses. This also reduces stresses to cam drive system. With a SMF, to provide the clutch cushioning the friction disc needs something -- like springs -- which makes for a heavier friction disc. And if the clutch is twin disc then both discs are heavier.
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