Warning on C4 Calipers

[Apogee]

Jan, I mentioned this on lat-g, but if you're running the 15/16" stepped bore S10 master cylinder, then you're capable of generating ~40% more pressure with the same pedal input then with a 1-1/8" bore. That could be a significant part of the problem. For those who are running C4 calipers, the 1996 Grand Sport calipers are pressure-cast versus the earlier ones which are gravity-cast, so they're the better choice if/when you go to replace calipers. It probably wouldn't have made a difference in this instance, but it should increase caliper life where the pressures are more in line with the design specifications for the caliper itself.

Tobin
KORE3

[jannes_z-28]

I have been in contact with Paul at HydraTech who gave me the HydraBoost unit. I won it at the Protouring.com SEMA-dinner in 2006.

The S-10 M/C is probably a major part of the problem but I have heard about similar problems with C4 calipers with the stock setup of M/C and Booster. In fact one of the rear calipers I got first (LT1 reworked) was slightly bent.

The Camaro Cup racing circuit here in Scandinavia have banned the C4 calipers due to the tendency to bend.

Anyway I have ordered C5 front calipers and will also get a Corvette C3 M/C with 1-1/8" bore.

Jan