OldGuy

I am getting confused. Which isnt hard these days. But NOW there is another class in the LeMans racing, the GTC class. Is that a Porsche only class? AND what car are they racing? The RSR? The R? and what are the specs on that car?
Why did the GTC drop out of GT2 class other than fighting with 3.6 liters vs the 7 liters in the Corvettes?
AND for the bonus question How come the other cars in GT2 got to cheat more than the GT3 BEFORE the GTC class came along?

mooty

there's no GT2 class. it's just GT. those are RSR's.
GTC are cup car.

C.J. Ichiban

paul, in ALMS the gt-c is basically the same cup car as the yokohama cup or patron cup or whatever, but with different tires.

TRD0524

ALMS GTC was initially formed from what was the GT3 class back a few years ago. Essentially formed only in 2010, it was to give racers (pro and gentlemen) a turnkey package/method to compete on more of a driver skill base while "keeping costs low". GT2 (Which is now GT as of 2011) is where the RSRs compete, but the ALMS GTC class uses only 997 Porsche Cup Cars (Cup S/Non-ABS). This is done because all the platforms would be equal and the IMSA sees the cars are seen as cost effective.

There was talks of introducing the Audi R8 LMS for the GTC Class for 2011 but that never came to fruition. Audi's racing infrastructure is not as large as Porsche's in the US, and the Cup cars are a bit cheaper to race. Not to mention the V10 is more suited in the GT class.

The Porsche Cup Cars for the GTC Class are essentially prepared in similar ways (Yokohama is the spec tire and sponsor of the series), and from 2011+, they will only use the OEM Porsche brake calipers (Disks, pads and fluid is open). Brake disks are regulated to 32 mm thickness and outer diameter is 382 mm front, and 357? mm rear. Master Cylinder size is open but the factory AP Twin master setup must be used. Suspension components are open. Engine is same all across the board as I know it.

Patron GT3 Cup is more regulated than GTC as to what can be done to the car as the GT3 cup is mainly sprint races. GTC participates in all ALMS Races in the USA (GTC does not go to the 24 hours at Le-Mans or the ILMC Races for 2011). ALMS GTC Cars compete in the 12 hours of Sebring and Petit Le-Mans races which are a bit hard on the cars, equipment and hence the cars need more work done to them to compete in such environments versus the shorter sprint race based series'.

Here is the technical Bulletin for ALMS GTC for 2010, which (for the most part) is what is used these days. There are a few different changes and options for 2011.

http://www.imsaracing.net/2010/ALMS/...%2001_2010.pdf

brake dust

The GT2 class is now GTE. There is a GTE-pro and and GTE- am.

TRD0524

Only for the ILMC races. For the regular ALMS races we have GT and GTC.

Polesitter

The origins of the GTC class emanated from an attempt to increase car count at ALMS races as well as provide cup racers an avenue to step up into endurance racing. It was somewhat controversial initially as other classes were concerned about increased traffic, closing speeds and less skilled drivers. By all accounts, the GTC class drivers have acquitted themselves well and incidents have minimal.