Steve,
I know there's at least four because when I was at Mid-Ohio a couple of weeks ago the C-5R's there were not the LM cars, those were still being rebuilt after the 24 Hours. They had three at Sears Point, the two LM machines and one of the spares for Dale Jr and Boris Said. I'm guessing they've got four rollers and enough spares to probably build up another one or two complete cars. Matt,
does your book have a chassis log in it?
John
The C5R has an interesting history. Design work on the racer was started in 1997 and was kept totally secret until just before the cars debut at the Rolex 24 hour race in 1999. Pratt & Miller built two 6 litre cars which lead the GT2 class in that USRRC race for 20 hours before encountering transmission problems - which also plagued them at Sebring in 99. The original two chassis had 6.0 litre ZLT-1 motor and carried black/silver Goodwrench livery.
Ultimately, 7 chassis have been built and since the 2000 Le Mans debut have run with up-rated 7 litre engine in a variety of different liveries. Ron Fellows has driven for the programme since it's inception.
The C5R is undoubtedly the most successful racing project GM have undertaken and it's roots can be traced back to the early 90's with the "American Patriot" and "Interpid" IMSA GTP programmes. The success on track has created a massive amount of interest and support for the Corvette brand, which is likely to continue with the debut of the C6R at Sebring in 2005.
I have dealings with the company that air-freights the cars between race venues and Pratt & Miller's facility in Detroit. I'm lead to believe that the C6R is a re-skin - i.e. mechanically it is the same car that dominates GTS right now, with the new body shape (not as pleasing in my opinion). Physical dimensions are so close as to not make much difference (The C5 is an unnecessarily large car - front overhang in particular is excessive and houses nothing but the radiator, a/c condenser, oil cooler, air cleaner and brake ducts).
It;s interesting to note how the brands track success has been used by GM for marketing and PR. In 1970 Corvettes had class wins at Daytona, Sebring and Le Mans - back then, nobody in GM seemed to know or care about this achievement - so much for "What wins on Sunday, sells on Monday".