Is the stock flywheel made out of steel?

i personally recon you're better off going for a flywheel that is designed to be light, ie chromolly steel

the stock flywheel is about 20kg and about 25mm thick 2 piece design, my lightened JUN one is a one piece chromolly about 7mm thick, to take that amount of meat off a stock one would decrease its structural integrity especially add to that extreme load and heat and you have a timebomb

for the sake of saving $300 is it worth the risk of having a flywheel explode (i think we've all seen the R33 skyline that had its chassis rails chopped by one)

this is only my personal view , there may be guys out there running lightened stock ones for ages with no drama's, but its just not worth the risk for me

Has anyone actually weighed a stock one?

JUN do 2 different flywheel. A lightweight one @ 5.4 kg and a super lightweight one @ 4.6 kg.

Exedy's is 5.75kg.

Would be interested to see what the oe one weighs before I order a new one and a new clutch.

I think I will go for the heavier of the 2 JUN ones. My car never gets driven on the road but I think that in the interests of driveability a little bit of mass there would be good.

brendon

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Losing is worse than death. You have to live with losing....

i've got the ultralight 4.6kg one, feels great, revs really freely, takes a while to engine break though, i have the stock one sitting on the bench in my garage but have no scales to weigh it on

Jump on the bathroom scales without it and then pick it up and see the difference?

Brendon

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Losing is worse than death. You have to live with losing....

yeah, don't have any though

Take it or leave it, lightened flywheels have been used successfully on WRX's for a long time. My 6.XX kg lightened OEM FW works very nicely.

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Speak to Shane @ SMC Tyres, Unit 6/385 Sevenoaks St Beckenham WA 6107. Mobile 0413 128 087. Tell him Maddog sent you!

Fidenza do some excellent Aluminium Flywheels. I had one on my last car with a 4 puck clutch which was just brilliant. They are as light or lighter than most steel flywheels and around half the weight of a standard flywheel. You get superb throttle response with them. I'll certainly be fitting one soon.

Theres a Fidenza Flywheel for sale on RSLC. 4.5Kg Billet for $300. If anyones interested.

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RS Liberty - Because WRX's are only good for parts...

Having a lightened flywheel would make the car use more fuel on highway cruiing wouldn't it? As the car would have to use more fuel to keep it spinning. Once the OEM one is spinning its easier for it to stay there as its rotating a larger mass.

How has everyone found that when using lightened flywheels and normal road driving, re fuel use?