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The number one thing that causes a clutch disc to explode like that is grabbing too low of a gear at too high of a speed. When you downshift, as you move the synchronizer, the blocker ring has to speed up the mainshaft gear, the counter gear, the input shaft, and the clutch disc. As an example, Let's say your car would turn 6000 rpm to go 80 mph in third gear. If you downshift into third at 105 mph, just the action of moving the synchronizer spins the clutch disc to 9000 rpm regardless of what you are doing with the clutch or throttle. Consider that with the fact that there is typically no clamping force on the disc at that point........poof. birdsnest in the bellhousing. Skipping gears is also the main cause of the money shift, where the DME sees stage 2 overrevs when the clutch is let out.
PS: The above is only intended as an example to hopefully draw responses so that mine are not the only opinions. Your actual speeds and RPM will probably differ.
Last edited by 911monty; 08-10-2018 at 08:12 AM.
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1998 Porsche Boxster
Threaded Mode
