Lightweight flywheel + DD = good idea?

[driver145]

I have a 330ci that I drive everywhere and I want to keep it mostly civilized for city/highway driving. However, I am a very very spirited driver and plan to start taking to the track every few months.

Something to do with the clutch is messed up and I will likely end up replacing the entire clutch kit. I am trying to decide if I want a lightweight flywheel or not (I am thinking UUC) and now is the time to do it because I am already buying a new part and paying 800+ to have the transmission dropped to work on it. I have never driven with anything near an 8lb flywheel before so I dont know what it will be like day to day. I do have decent throttle control (I can rev match downshifts pretty well) and I am used to fast revving motors (like a 600cc sportbike). I also plan on doing the dinan/shark chip in the near future which should also help with throttle response.

So, from people who have experience day to day with a lightweight flywheel... would you recommend it for my mostly civilized DD w/ my driving style and track visits?

[NobleForums]

How much of a weight difference? I dropped from a 18.2 lbs to 9 lbs on a turbocharged vehicle (the low compression of the turbo exacerbate any light flywheel difficulties), and it still made a very good daily, ease of modulation wise.

[fishfeet]

When I did my clutch I went to a lighter flywheel (12lb I think?)
Did not change anything negatively in the way of daily driving... in fact it enhanced my daily drive!

[radialaced]

I love mine.....engine feels snappy and quick.

[driver145]

Thanks guys, sounds like I will love it.

[SS Ball3r]

what would be any downsides to a lighter flywheel? Sory, im not very knowlegeable in this regard...

[Mitch]

The engine dropping revs more quickly can be a negative in daily driving applications. Also, lightweight flywheels have a propensity to "chatter" at idle.

[qidm67]

No I would not for daily driving. It's a compromise because the revs do go faster when upshifting but also the revs come down faster as well. It's the whole F=ma thing.

[fishfeet]

so what if the revs come down too fast? Give the gas a blip and go.

I for one love the fact that I have the lighter flywheel. It just feels nice.
The chatter is a bit annoying, and I hate my car making sounds. However, the fact that the car makes enough other sounds, I can deal with a little chatter. Plus, if it really bothers me I just make the effort to keep the clutch pushed in while stopped...

[driver145]

I can stand fast dropping revs. What I wouldnt be able to stand is a chattering flywheel or holding in the clutch at the stoplight so my car doesnt make funny noises. Is there some middle ground? Like a lighter weight than stock but still beefy enough to not rattle, maybe 15lbs or so. Of course, I am only welcomming suggestions if they are OEM quality parts and have a warranty of some sort. If not, I might just do the dinan/shark chip and replace with the stock clutch kit. Afterall, I do trust that BMW knows what they are doing in the first place.

Just for my own info, what weight is the M3s flywheel? Is it lighter than ours (330ci) or do we share the same one?

Thanks again.