Rossi:
KresoF1:
Tuned cars not any faster, on the track and in straight line thwn stock car. Despite the fact that tuned cars were on Cups...
Well, that's the same outcome as in any tuned-Porsche-Turbo test that I can remember.
Not true. The tuned 911 Turbo with Mezger engine were always faster than their OEM counterparts.
The problem with (not so effective) tuning started with the DI engine and the 997 Turbo facelift.
If you are referring to the track time only, you could be right though. It is very difficult to beat the very good chassis setup and most tuner chassis improvements don't work too well with the AWD/PSM setup.
This is the downside of the current 991 Turbo/S and even the previous 997 versions: The AWD/PSM are already part of something Porsche calls PTM (Porsche Traction Management) and everything is "connected" (networked), incl. PDK and now even the aerodynamics (991). The networking of the systems permits a very good setup but makes it very difficult for aftermarket tuners to improve anything. Usually, they make it even worse.
I mentioned it before: The limitation of the current 991 Turbo/S engine seems to be the amount of fuel being injected. You can raise the boost pressure all day long or improve ignition timings but if you cannot push more fuel through the injectors, everything is basically useless. Also, considering the fact that the AWS, AWD/PTM, PAA, PDK and so on are networked and adapting parameters based on how everything interacts, I would stay away from any chassis mods, including simple lowering springs.
Or to use the words of a tuner I know: The 991 Turbo S is a tuner's nightmare come true.
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RC (Germany) - Rennteam Editor Porsche 991 Turbo S, Porsche Boxster S (981), Jeep Grand Cherokee SRT (2014), BMW X3 35d (2013)