So I'm pondering getting a lightweight Fidanza flywheel (or perhaps shaving weight off the stock flywheel) for my Turbo, but I have some questions for those of you who actually have a lighter flywheel.

First, have you noticed any difference in your gas mileage? I know lighter rotational masses usually means more efficiency, but greater inertia (mass) would theoretically mean less energy needed to keep it spinning.

With such a light flywheel, are there any tedious daily driving drawbacks, such as, does it make the engine easier to accidentally stall?

Are there any reasons one *shouldn't* get a lightened flywheel?
For comparative purposes, what's the weight of a stock flywheel?

 

ummm.... no.... there are more reasons to get a lightened fly wheel, and get fidanza they have replaceable friction surfaces, it will be the best choice of flywheel. they are also very reputable, no notice in change in gas mileage untill of coarse the boost was increased and bigger injectors were used, but duh? and its not any easier to stall teh car, there really is only 2 noticable things, engine revs up much faster, and it excelerated better. i havent ever heard of anything against a lightened wheel.

 

On a turbo car, it's definitely worth it. On a non-turbo with a small displacement engine, it can cause stalling. The L motor makes good torque even at low rpm, so it shouldn't be a problem with our motors even on an NA.

The reason this comes up is because stalling is a VERY real side affect of severely lightened flywheels on motorcycles. ie. Small displacement motors with low torque. I've seen motorcycle engines stall between shifts because the driveline didn't have enough inertia to keep it running when the clutch was engaged and the throttle was off! But it would rev like you can not imagine!

 

i lightened my stock unit aboot 5 pounds or so, and got it balanced. it made a small difference, but not worth using the stock unit for such an application other than cost. the lightend flywheels usually use a higher spring rate of clutch. this in my opinion is what causes the rice burners and ill skilled drivers to stall there 100 hp cars.

 

i shaved a stocker, and you can shave of more than this,



But you don't want an exploding flywheel at high RPM's

I shaved a substantial enough amount but if you really want to go light a fidanza would be the way to go im still .5 kg havier .. however i shaved most on the outside where it counts .. however since my ACT eats flywheels

 

Ok, after listening to you guys, I went and ordered me up a Fidanza flywheel. ^_^