In terms of the dual mass/single mass flywheel there are a number of factors that need to be taken into account:
Weight
As the single mass is lighter this will alter the dynamics of the car. *This affects other components such as the suspension set-up and is therefore not as simple as just replacing the dual-mass with a single-mass flywheel.
EMU
The Engine Management Unit (computer that controls things such as fuel injection cycles in the engine) has been set-up specifically for the dual-mass flywheel. *Therefore it knows exactly how fast the dual-mass flywheel will spin under any amount of load. *The single-mass obviously has very different behaviour so there would need to be re-programming of the EMU to cope with this (and I
don't believe our colleagues in Weissach would ever release the EMU programming for the single-mass). *Fitting a single-mass flywheel without re-programming the EMU could cause major problems -
hence the invalidation of the warranty.
Vibrations/noise
The dual-mass flywheel produces a lot less vibrations/noise which is why it is fitted to the GT3. *The single mass would compromise the on-road dynamics of the car.
Positioning of the car
The GT3 is positioned as a road car that can be used on the track. *So we have to take into account some of the comfort elements (vibrations/noise) to make sure that we please as many customers as possible. *The GT3 RS is a racecar that can be used on the road
which is why we feature much more racing componentry such as the single-mass flywheel.
Hopefully the above makes sense. *It is always a very tricky subject as some GT3 customers always want to make their GT3 more 'extreme', however, this is really why we have the RS model.
I hope the above makes sense.
So that's a pretty comprehensive answer to a couple of avid track gents. Buy a RS rather than mess about with the " normal " GT3 set up.
It took a while. But we got there!!
