Quote:
Originally Posted by Neil B
Seems like most of the C5/C6 and aftermarket calipers have a bore area of around 4". This compares to the stock disk bore area of around 6.5". The C6 Z06 caliper bore area is larger at around 7.6". Anyone tried a C6 Z06 setup with the factory 1 1/8" master? I don't want to upgrade the master because the car is an original '69 Z28 and I want to keep it stock-appearing under the hood.
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Neil, I'm not sure where you got your information regarding the C6 Z06 front calipers, but it isn't correct. The C6 Z06 6-piston caliper pistons are 33mm diameter giving them each an area of 1.326 square inches. In order to calculate the effective area of a fixed caliper, you sum the total area on one side of the caliper, so in this case it's 3*(1.326) = 3.978 square inches, virtually the same as the 2-piston C5/C6 calipers. Your factory single-piston calipers have an effective area of 6.79 square inches. The CPP kit is just below that at 6.58 square inches.
As for your master cylinder concerns, you can just run a 15/16" or 1" bore master cylinder with your vacuum booster and any C5/C6 brake kit variation you like. CPP in fact sells C3 Corvette style cast iron master cylinders in both of these bore sizes that look like a factory type unit if that's your goal. If you prefer to run one of the orignal Delco castings, you get remanufactured units at nearly any auto parts store across the country.
The only way we would suggest running a 1-1/8" bore MC with any C5, C6, C6 Z51, C6 Z06 kit would be with a hydro-boost.
Tobin
KORE3