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Are most major clutch components model-specific to the turbo?

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Old 12-17-2016, 03:06 AM
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mel_t_vin
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Default Are most major clutch components model-specific to the turbo?

The 924S, 944, 944S, and, if not mistaken, the 944S2 all use 225mm discs, while the 944 turbo uses a model-specific 240mm disc.

To accommodate the larger disc, the turbo uses a model-specific flywheel. And to accommodate power and torque, the turbo uses a model-specific pressure plate with a higher clamping force.

Does the turbo flywheel have a larger diameter? Possibly an increase of 15mm?

How about the turbo ring gear...is it a larger diameter, model-specific, part as well?
Old 12-17-2016, 09:44 AM
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odonnell
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Yes, flywheel and bellhousing are larger for the larger disc. Throw out bearing is also different, and thus, so is the clutch fork. I did a side-by-side and they're very similar but very slightly different spreadwidth.

951 ring gear is 132 teeth, where the NA part is 130. Again, due to larger OD disc.
Old 12-17-2016, 11:52 AM
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Humboldtgrin
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I believe the 930 clutch disc will work for the 951. 240mm diameter.
Old 12-22-2016, 05:08 AM
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mel_t_vin
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Originally Posted by odonnell
Yes, flywheel and bellhousing are larger for the larger disc. Throw out bearing is also different, and thus, so is the clutch fork. I did a side-by-side and they're very similar but very slightly different spreadwidth. 951 ring gear is 132 teeth, where the NA part is 130. Again, due to larger OD disc.
Thanks, Michael.

Yes, agree...throw out bearing and clutch fork are turbo-specific parts, as well. Interesting tidbit...132 teeth vs 130 teeth.
Old 12-22-2016, 05:09 AM
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mel_t_vin
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Originally Posted by Humboldtgrin
I believe the 930 clutch disc will work for the 951. 240mm diameter.
That is my understanding, as well.



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