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Lightbulb Question for FR_WILK or any other good DME guys

WHile my 924S is off the road I am making a list or repairs and upgrades one of witch is a Light weight flywheel, I have been doing some research and I have found out that the DME on 968's with a light weight flywheel was having problems keeping up with the rapid deceleration of the engine since there is no longer a heavy mass to keep it spinning when not on the gas. Would this be true with a 87 924S DME, Why would this happen, How could it be fixed. THANX
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Old 08-01-2004, 07:56 PM
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What? Where do you get a light weight flywheel for a 968? The single sensor system requires the large lugs on the circumfrance of the flywheel and these have to be steel for the sensor to work.

As to rotation speed; while the single sensor is a very basic impulse design I think it's more than able to keep up with the changes in RPM's as well as the DME logic.

If you could post the links to where you found your information I sure would like to read it.
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Old 08-01-2004, 09:31 PM
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The "lightweight" flywheel for the 968 is merely a single mass version. Porsche AG sent out a bulletin when these vehicles were current advising that the flywheel should be replaced (with the single mass part) if the car was tracked. To my knowledge there was no chip change required.

This was the same bulletin that introduced the wider balance shaft belt, because the narrow version was breaking with monotonous regularity on early 968 models.

For a street driven 924S, I can't see any advantage of a lightweight flywheel.
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Old 08-02-2004, 08:24 AM
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Fr-wilk I would assume that this is what they where talking about but they where not sure if the 924S would act the same way as the 968 did.

Link http://forums.rennlist.com/rennforums/showthread.php?t=148559&highlight=Flywheel
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Old 08-02-2004, 01:45 PM
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