[wyked]

Hello everyone,

Just thought I would introduce myself. I've been lurking here off and on for years, every time I got tempted to buy my fathers Z28. He ended up making me an offer I couldn't refuse so as of this weekend I'm now the proud owner of a black '93 Z28 with 40k on the odometer. It's basically stock with the exception of a Moroso CAI and Hurst shifter.

The current plan is to catch up on the maintenance and take it to a track day August 31st (Bertil Roos - Performance Driving Clinic up at Pocono). I'd love to hear anyone experiences with Roos? Did a search and didn't find much. I'm planning to flush the brake fluid and do other maintenance items people have suggested here in past pre- track postings but I'm waffling on the brake pads. I read the suggestions, I've had Hawk pads on a street car in the past and the brake squeal drove me nuts. Any chance the stock pads will suffice for the first track outing? or am I dreaming? Other suspension and engine mods will have to wait until I finish other projects.

Dan

[trackbird]

The brake bias stays the same with the C5 kit and the LS1 brake parts (using the C5 caliper and LS1 rotor will shift brake bias to the rear). The C5 uses a larger rotor (more leverage) and smaller pistons (less clamping force for a given pressure input). So, either is a direct swap onto your car. The LS1 setup is a HUGE upgrade over the completely inadequate LT1 brakes. The C5 setup is a very signifigant upgrade over the LS1 brakes.

The LS1 setup is "spindle and all" and you just pop the balljoints and install the spindle, rotors, brakes and everything, bleed the brakes and you're ready to go.

The C5 setup works on either the LS1 or the LT1 spindles. You do some trimming on the spindle and bolt a bracket onto the spindle assembly (with 4 very strong bolts) and swap rotors and add the Corvette calipers and hardware.

Neither is difficult. C5/C6 brakes require 17" wheels. LS1 brakes fit under 16" wheels. If you have 16" wheels, the choice is easy (for now, once you upgrade that will change). Either is a much better idea than running LT1 brakes.

[Eskimo]

The brake bias stays the same with the C5 kit and the LS1 brake parts (using the C5 caliper and LS1 rotor will shift brake bias to the rear). The C5 uses a larger rotor (more leverage) and smaller pistons (less clamping force for a given pressure input). So, either is a direct swap onto your car. The LS1 setup is a HUGE upgrade over the completely inadequate LT1 brakes. The C5 setup is a very signifigant upgrade over the LS1 brakes.

Kevin, I don't disagree that the C5 calipers put onto a LS1 car with the stock 12" rotors would put more bias to the rear.

But since he's (LT1) going from the 11" rotor to a 12" rotor, wouldn't using the C5 calipers on that keep the brake bias the same as OEM?

I know it's a small detail, but...

[trackbird]

The brake bias stays the same with the C5 kit and the LS1 brake parts (using the C5 caliper and LS1 rotor will shift brake bias to the rear). The C5 uses a larger rotor (more leverage) and smaller pistons (less clamping force for a given pressure input). So, either is a direct swap onto your car. The LS1 setup is a HUGE upgrade over the completely inadequate LT1 brakes. The C5 setup is a very signifigant upgrade over the LS1 brakes.

Kevin, I don't disagree that the C5 calipers put onto a LS1 car with the stock 12" rotors would put more bias to the rear.

But since he's (LT1) going from the 11" rotor to a 12" rotor, wouldn't using the C5 calipers on that keep the brake bias the same as OEM?

I know it's a small detail, but...

I don't think it matters if it's an LS1 or an LT1 car that we start with. GM has typically used very similar brake bias calculations for most of their cars. This is why we can swap parts from one to the other, etc and it still works out ok. The LT1 has a single piston caliper with a large amount of piston area. That extra clamping load that's provided by the larger piston area is likely balanced out by the smaller rotor. I haven't seen the numbers worked for the LT1 cars, but I'd be surprised if the piston area/rotor diameter didn't work out to the same bias setting as the LS1 cars and the C5/C6 Corvette. It's more of a hunch than anything, but I suspect that's exactly what we'd find if we went looking.