I was wondering if anyone replaced the dual mass flywheel on the Cayman?
I had a dual mass flywheel on my daily driver, but once the clutch went out, I replaced it with a Fidanza 12.5lb and a Stage1 clutch. The throttle responsiveness is like night and day.
Dual mass flywheels are generally heavier and the only benefit I see is reduced vibration. But it also boggs down acceleration from standing (at least in my car).
So I'm wondering if it would be advisable to replace it with something lighter as a modification of course, to improve throttle response.
Would doing this be better than having the Sport Chrono option as well?
Thoughts?
Not sure if anyone makes one for the engine or not or if the GT3 one would fit. Would be interesting to feel the difference though I agree.
I replaced the oem dual mass flywheel w/a LWF in my 993. The engine revved much faster, but the throttle remained linear & was no more responsive for a given pedal movement. Revs also dropped much faster off throttle. Thus, it felt much different than SC which, at least to me, doesn't seem as linear as standard & can be harder to modulate, especially on slippery surfaces, since a slight pedal movement results in much more throttle opening. Plus, although the added "chain rattling" sound from the LWF didn't bother me, others might find it objectionable.
In short, SC & LWF do what they do differently w/different results.
I'm sure you can shed some weight replacing the flywheel, but I would be skeptical about the results.
I guess in theory the throttle response will be better, but really this will be most noticeable under no load. So this mod may mimic SC when you're shifting, downshifting, heel-toeing, etc... But under load, I am not sure there will be much difference. The rotating inertia of the flywheel will become insignificant compared to the moving inertia of the vehicle, so I am not sure you would feel much difference if any while accelerating.
STLPCA, you have experience with this in your 993. Can you comment?
If you did replace the flywheel, you would also need to replace the clutch disk with one that has some form of damping springs in it to isolate the gears from the combustion pulses, or you will be beating on your transmission and creating a lot of drive train noise. A clutch disk with springs will be heavier than the disk that's in there now, so the syncros will work harder, shifts will be slower and the factory may not warranty any transmission problems.
A dual mass flywheel is somewhat complicated. Here's a cutaway:
To summarize, the main benefit of doing this is to lighten the clutch disk. Lightening the clutch disk allows it to change speed more quickly between shifts which makes life easier on the syncros and makes shifting faster, easier and smoother. In addition, because a dual mass flywheel can have longer springs, fluid damping and so on, it offers even better absorption of the combustion pulses which results in less transmission noise and vibrations.
I wouldn't want to mess with that.
Want to learn more about the dual mass flywheel,
check this out
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Seems that might be a disadvantage to have revs drop quicker off throttle when the car performs best over 4000 rpm.
One of the other advantages of the lighter flywheel is getting the RPM up faster on the blip in heel/toe downshifting. That obviously, is a no load situation. Once you get used to it, that timing difference can get you braking later and heavier for the turn in point or during overtaking on the inside of a turn.
I know nothing about the dual flywheel and am sure Porsche has a reason for that. But I can say that a ligher flywheel is a quick, easy way to get quicker acceleration. When I bought my MINI, the dealer immediately asked if I wanted to buy a lighter flywheel. Not a Stage 1 or Stage 2 clutch but just a lighter flywheel. The RPMs DO spin up quicker.
The downside to it is the lighter you go, they more they rattle. I have no idea if it would work in a Porsche but its a common mod on MINIs.
Hey Chows,
I can certainly see that it would make a difference in acceleration under no load, but can you feel a difference under load?
I've heard of people doing this to many different cars, but never experienced this myself.
