Cheers,

I've been reading a lot of positive reviews of lightened flywheels for our barchettas.
From -14% to -20% less weight, after machining and balancing (Very important)
the original FIAT cast iron flywheel.
The driving experience changes a bit from what I heard, as the car goes more
freely up the rev range. As soon as the flywheel is properly balanced there aren't
really downsides relating to engine wear.

I would like to obtain feedack about experiences on this subject if possible.

Best regards.

hiya, I have a 4kg exact on mine, the only thing i have noticed is that i require a semi race performance clutch to work. i used a fast road clutch but seem to wore it out with very few miles.

KC3 said:

hiya, I have a 4kg exact on mine, the only thing i have noticed is that i require a semi race performance clutch to work. i used a fast road clutch but seem to wore it out with very few miles.

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That is interesting.
I'm looking forward to buy an origina one lightened to 6,6Kg, which is more or less -21% than the original one, which weights about 8,442 Kg.
About -20 to -25% is the safe zone a lightly tuned road engine.
Yours is about -50% the original one, so it is just like a racing flywheel !

Another detail... the clutch.
I was told that there is quite a difference in weight in OEM replacement cluthes.
That was a surprise : valeo is 1256 gramm and the one from Luk is only 966 gramm (and cheaper).
This is a nice tip if anyone here can confirm.

hiya, There will be some slight weight differences with different company's although generally fast road or semi race clutches have a different design and so use less material which will also have a some weight difference.

i never did it ! but in teory it will have a rufer idling !!

JMSG said:

i never did it ! but in theory it will have a rufer idling !!

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Indeed. However race/paddle plate clutches and lightened flywheels usually get fitted to race engines which have a much higher idle speed of 1500 to 2000 rpm or even higher in the case of F1 engines (4000 to 10000rpm depending on test, practice, qaully or race modes).

JMSG said:

i never did it ! but in teory it will have a rufer idling !!

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If don't get past -25% weight, it doesn't get agressive when idling...

it all depends for what you use the car for !
oem it's tuned for every day use in public road !
tuning it's allways a compromise , you win something to lose something else !!

what are the advantages of ligthning flywheel ? weight reduction , fast responce to aceleration ... ?? the downside ? less stable idling , premature ware for clutch , extra cost parts ... ??

I will be wanting a new clutch at some point. Interested in going down the route of a lightened flywheel. So where do I get one, any recommendations?

Can't think of any other reason to install a lighter flywheel than pure racing.
It will make your everyday drive more difficult as you will have to change gears faster, and handle your accelerator with more precision when taking off.
Yes you can rev up faster standing by the red traffic light, but your b will still be as sluggish when the light turns green. Unfortunately, the mass of your flywheel is neglectable compared to the mass of your belly