C4 brakes question

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Jul 10, 2011 | 05:05 PM

PerKr

Thread Starter

Racer

Joined: Sep 2008

Posts: 419

Likes: 140

C4 brakes question

I'm wondering about the standard brakes on 84-87 and 88-96(?) vettes. Are the rotors the same thickness only different diameter and offset?

think I've seen the answer I'm looking for before but I just can't find it now...

Jul 10, 2011 | 08:59 PM

coupeguy2001

Le Mans Master

Joined: Sep 2006

Posts: 6,050

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From: Phoenix AZ

2021 C4 of the Year - Modified Finalist

nothing is the same.

Jul 10, 2011 | 09:59 PM

Churchkey

Melting Slicks

Joined: Sep 2008

Posts: 2,376

Likes: 111

From: Cherokee National Forest TN

Early C4 front rotor data

# of Bolt Holes : 5
Bolt Circle Diameter : 4.75"
Brake Rotor Diameter : 11.5"
Brake Rotor Discard Thickness : .72"
Brake Rotor Thickness New : .79"
Brake Rotor Type : Disc Brake Rotor Only
Center Hole Diameter : 2.78"
Height : 2.52"
Maximum Lateral Runout : .004"

Later C4 W/12" front rotor data

# of Bolt Holes : 5
Bolt Circle Diameter : 4.75"
Brake Rotor Diameter : 12"
Brake Rotor Discard Thickness : .72"
Brake Rotor Thickness New : .79"
Brake Rotor Type : Disc Brake Rotor Only
Center Hole Diameter : 2.78"
Height : 2.21
Maximum Lateral Runout : .002"

Later C4 W/13" rotor data (incl J55 option)

# of Bolt Holes : 5
Bolt Circle Diameter : 4.75"
Brake Rotor Diameter : 13"
Brake Rotor Discard Thickness : 1.04"
Brake Rotor Thickness New : 1.1"
Brake Rotor Type : Disc Brake Rotor Only
Center Hole Diameter : 2.79"
Height : 2.21"
Maximum Lateral Runout : .002"

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