Does anyone have a sprung clutch with a LWFW installed?

[rob76turbo]

I am thinking along similar lines, but does the spec line have a version for our cars that is s sprung clutch?

[violametallic-S-]

Should I be looking for a single mass LWFW or a dual mass? What is the difference?

[Cloudsurfer]

You won't find a lightweight dual mass. Single mass is just that: one piece of metal. A dual mass has two pieces that are held together with elastomeric material to allow some "give" to dampen driveline forces.

Spec does make a sprung clutch (they'll make pretty much whatever you want actually), and if you do go to a single mass flywheel, a sprung centered clutch is the only acceptable way to do it.

[JFP in PA]

You are missing one very important point: The dual mass flywheel acts as a vibration dampener for the engine; the sprung clutch acts as a dampener for the drive line………..taking away the dual mass dampening can result in problems as the largest vibration dampener on the engine is now missing.

[Cloudsurfer]

That is absolutely true. In my ideal world, I'd like a lightwight dual mass unit, but alas, I've never seen one produced for any application.

[JFP in PA]

Originally Posted by bmwm750

That is absolutely true. In my ideal world, I'd like a lightwight dual mass unit, but alas, I've never seen one produced for any application.

Which is why I totally agree with Jake on this one, and wouldn’t run one without internally balancing the M96 first………….these engines have enough issues without increasing their internal harmonics.

[Jake Raby]

I have recently experienced a broken crankshaft from an engine equipped with an LWFW that was dynamically balanced as an assembly with the engine totally disassembled. (I did not assemble it)

But that person has broken 4 crankshafts since last October.