Brakes That Will Stop A Freight Train

[Hog]

Very nice D-Mite, looks great.

[Jitse]

Those Baer eradispeeds come with an allum. Hub too, ( out of my mind).
And available to fitt your J55 calipers.

But I like this Wilwood rotors too, is price and quality similar?

Jitse

[rkreigh]

like to see if these have a similar offset to the BAER Alcon setup I have now. my rotors are toast and need replacing

I think the wilwood are both cheaper and nice than the BAER stuff

[Locobob]

Originally Posted by rkreigh

like to see if these have a similar offset to the BAER Alcon setup I have now. my rotors are toast and need replacing

I think the wilwood are both cheaper and nice than the BAER stuff

I have the same Alcon kit and have been talking with Hoerr Racing about refurbishing, they quoted me about $170 per for Coleman rotors but they want to see the rotors first hand to be sure. The Wilwoods look great Cliff.

[POWERBRAKEBOB]

Those are beauties. However, one of the weaknesses of the C4 brakes is the Australian booster and master. The Dual dia vac booster is a huge improvement over the plastic booster. The problem here is the 7/8" master cylinder.
The piston size in the calipers is small. The C5 calipers are much larger pistons. Nice, but that requires a larger master cylinder to provide the needed volume. C5's and C6's used 1" masters. The bolt pattern on the C4 boosters does not allow for master cylinder upgrading.
Installing these large calipers without the 1" master and Delco dual dia booster GM needed to APPLY the larger calipers leaves you with a low mushy pedal.
Baer brakes made brackets years ago to install C4 calipers on Camaros thinking that was going to work for high powered stopping. It didn't. The 1.125" master used on Camaros and Chevelles could not spike the pressure high enough to improve the stopping power.
I met a guy years ago, that had installed twin calipers at each front wheel on his ZR-1. He complained that he had to pump the pedal twice each time to stop the car.
Her, I believe is the solution. The Bosch Hydroboost. It can accommodate any size GM master. I used a 1" here, because the booster has so much power.
Many experts think you just keep drilling holes in rotors or keep increasing the rotor diameter until absurdity.
Not so. PRESSURE is what stops the car. When a jetliner lands, you FEEL the brakes apply. HARD. Pilot is only on them for a few seconds at 160MPH.
In a car, if the rotors are overheating, the pressure is TOO LOW.
It's like pulling a rope thru your hands. It's going to keep burning until you squeeze it hard enough to stop the slipping.
Half way applying pads against a spinning rotor is much the same.

[mike100]

The power steering is already kind of taxed on the C4- how much pressure will the hydro-boost use when not actually braking?

[-=Jeff=-]

Originally Posted by POWERBRAKEBOB

The piston size in the calipers is small. The C5 calipers are much larger pistons. Nice, but that requires a larger master cylinder to provide the needed volume. C5's and C6's used 1" masters. The bolt pattern on the C4 boosters does not allow for master cylinder upgrading.

You can install a 1" Master from a 98-later F-body on the ZR-1 it will bolt up.. needs a spacer (or the end drilled) to get it just right.

So with some of these guys doing C6 Z06 brakes all around, what Master do you suggest? will a 1" be enough?

THEN, which master is correct as you want to be sure the bias is correct front to rear too right?

[Dynomite]

Just got done installing this Wilwood Rotor and C5 Z06 Brake Calipers on my 90'. All fits perfectly identical to the same set up on my 91'

So.....this Wilwood Rotor and C5 Z06 Caliper Brake set up has been confirmed to fit perfectly twice.

ZR-1 (90' and 91') Wilwood Rotors and C4 to C5-Z06 Conversion

Wheel Weights and Sensor Cable Bracket.
a. I had to move wheel weights as there is only 1/8 inch clearance between inside of wheel hub and C5-Z06 calipers.
b. The wheel sensor cable bracket was twisted just a bit. This assures clearance between the wheel sensor cable and the SS brake line at maximum steering angles.

Wheel weights that were between spokes moved .......Weel weights in line with a spoke moved inside spoke
inside two adjacent spokes


90' Brake Upgrade to C5-Z06 with Wilwood Rotors.

[Locobob]

I don't get it... why the close clearance issue? How is this different than a typical C4 to C5 brake conversion clearance wise? Isn't the rotor the same size - 12.8?

[Dynomite]

Originally Posted by Locobob

I don't get it... why the close clearance issue? How is this different than a typical C4 to C5 brake conversion clearance wise? Isn't the rotor the same size - 12.8?

Must be the Caliper

What is a typical C4 to C5 brake conversion?
What Offset, What Adapters, What Brackets, What Calipers, What Rotors????

I had a single layer of weights about 1/16 inch - 1/8 inch thick just inside of the spokes and they hit the ribs of the C5 Z06 Caliper (the stock C4 Caliper did not have that interference issue). You can see in the photo the tight fit of the C5 Z06 caliper inside the wheel. The face of the Caliper to spoke clearance was maybe 1/4 inch. Spacers on the Hat could be used to make that spoke clearance greater (with no change in adapters or Rotor offset).

I would call that close clearance given the caliper slides on pins of the bracket