What are the differences between the stock Evo 7, stock Evo 8 and stock Evo 8 MR clutches?

What are the pros and cons of installing an Evo 8 MR clutch in my Evo 7?

 

I don’t think there’s much difference at all. I know that for rally homologation purposes there is a difference because you are not allowed to use the EVO8 clutch in an EVO7 Grp.N rally car. I think it might be a different number of “fingers” on the cover or something. Then there’s supposedly some difference in the 6-speed cars, I think it’s the disc that has a different centre.

If you like to use an organic disc, an up-rated cover together with a stock disc works fine. I used the Ralliart EVO8 clutch cover RA981846K1 together with a stock EVO8 disc and my stock EVO7 flywheel and it held up very nice and driveability was like stock with just a slightly heavier pedal.


Cheers,

 

thanks, Where Did you buy the Ralliart Cover?

I think that the Evo 7 and Evo 8 have the same disc and flywheel.

 

Got it straight from japan but most Mitsu dealers should be able to order it I guess. Disk and flywheel should be the same, at least they are interchangable.

 

Flywheel is the same on all of them.
Disc is the same on Evo 7 and 8, but slightly different on MR (for noise reduction).
Evo 8 and MR use same pressure plate
Evo 7 pressure plate has different geometry than Evo 7 and MR.
Evo 7 pressure plate is about 2450-2600lbs (we've tested two), while the Evo 8 is 2200lbs.
Ralliart Evo 8 tests about 2700lbs and will work in Evo 7 but geometry is different so the pedal will be unnecessarily stiff. You feel like you are getting a lot more clamp load than you really are.
Evo 7 pressure plate will not work in Evo 8. Not enough travel to make up for different geometry.

...and of course we have ACT parts for all of them (shameless plug).

 

I just installed the ACT and it is GREAT... It should be in the car from the factory... Dealership installed it and said that to me first... Oops... Off topic!

Chris

 

Thanks!!