PDK: Porsche Doppelkupplungsgetriebe (PDK), literally Porsche double-clutch gearbox.
In response to C7S:
I’m being slightly pedantic saying this as I’m sure you already know, but semi-automatic transmissions are predominantly used in racing.
PDK has, in conjunction with a number of other technological and mechanical improvements, increased acceleration in the new Carrera range a great deal more than you have suggested.
Everything else you’ve said seems plausible though. Thanks for your input.
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GT3, GT3 RS, and GT2 are race car versions of the 911.
Race cars do not have automatic transmissios or double clutch transmissions.
PDK=extra weight=worse handling and slower top speed.
PDK only helps with acceleration by 0.1 seconds.
The traditional manual transmission is what race cars use. So Porsche only uses manual transmissions in those cars.
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Could be the weight issue, and with how it’s setup, it might mess up the weight distribution of the car. 911s have been gaining some weight over the years.
or maybe they’re just holding it off? The 2010 GT3 RS is supposed to have the pdk and manual options.
so could be that it’s meant for enthusiasts who would rather have a true manual over the double clutch gearbox even if it’s faster.
I’m going to have to disagree with the majority of what’s been said so far… so first to correct a couple points in regard to Porsche’s race cars and what you’re likely to find in them.
The GT3 comes as either the GT3 Cup, which is homologated from the GT3 Road car, and the GT3RSR, which is homologated from the GT3RS road car. The first is generally run in spec series or as a GT Class car in cost conscious series, and is outfitted with the same basic manual transmission from the basic GT3. The rules under which the GT3 RSR is run is quite different… I’ve had the good fortune to ride in as well as drive these and every one was outfitted with a sequential gearbox with automated upshifts and manual downshifts (with a clutch).
In short, what is outfitted to the race cars will generally be whatever the governing rules allow, and will have little to do with what is outfitted on the street car. If the rules allow for a fully automatic clutch AND there is an advantage to it, you can bet that Porsche will outfit it on the race car regardless of what is available on the road car.
so why?
The current PDK is a vast improvement over the tiptronic, but feedback I’ve heard from drivers who’s opinions I trust has been mixed enough to make me wonder if the system as offered right now is simply not suited for the GT3 (remember this option was in development a few years ago and was passed over for the Carrera GT as it was considered promising, but simply not “there” when compared to the manual).
Given the quick development of the system though, it seems likely that it will make an appearance at some point in the GT3, but may not appear until the next model year or near the end of the current MY.
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