I was curious whether any of you guys have had experience with lightweight flywheels. I've been searching for a clutch/flywheel combo forever. I chanced upon a well priced, albeit slightly used, combo with an Exedy organic disc. The only issue is that the Jun flywheel is 10.3lb.

The stock flywheel weight on the FC Turbo is 22lb. Other aftermarket flywheels are at 17lb (RB) and 14lb (ACT). I believe it will be a benefit when autoxing and spirited driving, but how streetable would the car be with such a light flywheel?

 

S2000 Talk will give u a better result.

 

I've always been a big fan of a lightweight flywheel on my vehicles. I typicaly go with the lightest one I can get. My last was a Findanza that weighed 8lbs and made a noticable difference in the way the car responded to throttle input and acceleration while already rolling. The heavier units help aid in acceleration out of the hole from a dead stop and with a lighter unit you tend to have to give it a few additional revs as to not stall the car out

The only downfall that I have found with the real light flywheels are the noises you hear from the clutch pressure plate. Most of the time you will end up with a sound similar to a bad throwout bearing that goes away when the clutch is depressed. If you can deal with the added noise then I feel it's a worthwhile investment in my opinion.

 

All positives, any negatives erode over time as you get used to the setup. Overall the flywheel is just extra wait dragging/slowing down the rotation of the drivetrain.

Yes it does require some finesse at first which some people freak out about. I have never had one on an S, but I had several on 300zx twin turbos.

 

2 things. It is not the weight of the flywheel which matters it is the total MOI, which not only takes weight in to the equation, but where the weight is, so it is pretty hard to compare one aftermarket flywheel to another.

Secondly pay attention to what material is used...aluminum flywheels are typically not as durable or reliable as a Chromoly Steel unit which can sometimes be even lighter. I would not buy an aluminum flywheel myself.

I have heard also that on Turbo cars if you go to a flywheel with a really low MOI you can fall out of boost between shifts because engine revs fall too much. Might be something to consider, but you probably wont have the issue if you shift fast enough.

 

I have a Greddy Turbo, 300 to the wheels, I just ordered a Competition Clutch 11.5lb STEEL Flywheel, what do you guys thing about that? good choice?