Second, I'm not sure about the effects of fitting such a light flywheel as I haven't driven a car with a lightened flywheel before and had just got used to the idea of a lightened standard flywheel . I understand it will take an adjustment of driving style and stalling may be an issue until I get used to it. With engine revs slowing down more quickly are gear changes different / more rushed? It's for a mini so I should have a fair bit less weight than the average micra.
Any help or suggestions gratefully received.
when I fitted my 3.4kg ultra light JUN flywheel with a 3 pad helix clutch, first thing I noticed was whoa it's so responsive like a motorcycle engine. engine response was fantastic which really helped improve up/down shifts cos didn't have to wait for the revs to change, just bang it into gear.
the reduced mass will obviously reduce inertia so initially you'll prob stall it few times when driving off but honestly it's down to relearning clutch control.
on a standard heavy flywheel you could quickly release the clutch and hope the heavy inertia and bite of the clutch will propell the car upto speed before the revs stall.
but with a light flywheel and low inertia you need to either release the clutch more slowly under low throttle/rev or apply more throttle & revs when releasing rapidly.
with paddle clutch plates, low inertia racing flywheels also offer less vibration dampening so the clutch engagement can occasionally become 'juddery'