buying a used lightened flywheel

[NoTurbo]

Would any of you buy a ragged lightened flywheel?

What are the risks of it cracking?

[ross_jsy]

Voted yes, depending on how much it has been lightened. There is a safe minimum you can take them down to

[Automaton]

Wouldn't take a chance, might save me money now, but may have to pay a lot more if things go awry.
PWPF

[DanThe]

A "ragged lightened flywheel"?
Whats that?

[gooner1]

Seeing as most, if not all, are secondhand I vote yes.

Pretty sure you would be able to get it checked, if you were dubious about it.

[Meatballs82]

Voted yes, I had one fitted to mine this year - no problems so far!

[NoTurbo]

A "ragged lightened flywheel"?
Whats that?

haha, sorry for the slang.
Ragged means it has come off a car that was raced regularly and driven hard for most of its life

[Split_S]

Some stuff I just won't buy used.... If you're gonna go thru the hassle of changing a flywheel, do it right man! For the little $ you'll save is the risk worth it?

Me thinks not...

I'll be changing mine and Im going with an aluminum machined flywheel made specifically for the job. Not cheap, but I wont be changing it out a month later Im pretty sure...

[ross_jsy]

Thing is it's a big chunk of steel. Not much that can go wrong with it bar maybe excessive wear/heat distortion but that will be evident just by looking at it.

[Split_S]

Still, I always wonder why the guy would be selling it in the first place... If youre gonna do the install yourself then go for it if its cheap but then again - I wouldn't.

[Blitz]

Its not something that goes wrong often unlike dual mass.

[Simon13]

some rubbish being said here! holy moly

[maggspower]

There is very little to go wrong on a fly wheel, the ring gear, and the clutch friction surface. Never seen a worn out ring gear on an e30, and the clutch surface can be reground.

Hairyscreech ran a computer simulation on a lightened flywheel, it had less stress on it than a standard one. The stress is centered around the mounting holes, so any material removed from the outer edge lessens the centrifugal force placed on it.

I have never heared of anyone losing their feet in an exploding flywheel incident, there is allways a first though

I can lighten and balance, flywheels here, if anyone needs one doing. Group buy?

[ross_jsy]

Always is now Simon.

Maggs, I have seen some grim pictures of flywheel failures...on sub 9 second drag racers not sub 200hp road cars

[maggspower]

Always is now Simon.

Maggs, I have seen some grim pictures of flywheel failures...on sub 9 second drag racers not sub 200hp road cars

Yes my mistake, it should have read "in an e30", I have heard some nasty story's too.

As for spurious information, well.......

[DanThe]

Some alloy flywheels are known to fall apart, ive never heard of a BMW flywheel breaking up, road or racing use, ive seen one thats come off the back of the crank on a race car but it didnt rip through the floor or anybodies limbs, just took a lump out of the gearbox.