A question about brakes.
Thread Starter
Race Director
Joined: Dec 2003
Posts: 14,137
Likes: 935
From: Fremont Ca
2022 C4 of the Year Finalist - Modified
A question about brakes.
Id like to pick up an extra set of brake calipers for my ZR-1 and have them powder coated and I know somebody parting out a base 95 Coupe.How much of the brake hardware is the same as ZR-1?Something about J55 rolling around in my head,not sure.Im looking at putting together a complete set with brackets.What do I need and how much from a base car is compatible with a 191 ZR-1? Thanks.
Safety Car
Joined: Jan 2004
Posts: 3,556
Likes: 13
Nothing interchanges between the reg (12" ) and HD ( 13" ) brake setups except the brake pads
For quick ID in a car ;
the J55 rotors are over 1" thick ( 28mm ) ; std are 3/4" thick ( 20 mm)
Last edited by vetteoz; Mar 5, 2012 at 07:56 AM.
Team Owner
Joined: Aug 2005
Posts: 34,988
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From: Riverside County Southern California
Co-winner 2020 C4 of the Year - Modified
2018 Corvette of Year Finalist
2017 C4 of Year
2016 C7 of Year Finalist
St. Jude Donor '09 thru '20
I went in and check with the parts manual and all parts between the 12" and 13" systems are the same but the bigger rotors and the bigger caliper bracket.
The caliper and the pads are the same parts used from 89-96 except Z15 and Z16 (CE and GS which used black calipers).
The caliper and the pads are the same parts used from 89-96 except Z15 and Z16 (CE and GS which used black calipers).
Burning Brakes
Joined: Oct 2005
Posts: 849
Likes: 1
From: Shelbyville IN
If the bracket is different, wouldn't the caliper need to be different, too?
Team Owner
Joined: Aug 2005
Posts: 34,988
Likes: 515
From: Riverside County Southern California
Co-winner 2020 C4 of the Year - Modified
2018 Corvette of Year Finalist
2017 C4 of Year
2016 C7 of Year Finalist
St. Jude Donor '09 thru '20
but, its not. The C4 front caliper pads do not touch the entire rotor surface. I dont have a picture to prove it but, I had the J55 on both Vettes and the 13" rotor is larger but the pads are not. That is another great chapter on C4 engineering.
Safety Car
Joined: Aug 2008
Posts: 4,344
Likes: 48
From: San Marcos CA
All 95's and 96's came with the 13" J55 size probably to simplify inventory at the end of production and to offer the better set across the line.
but for sure my 95 LT1 car had the big 13" rotors
but for sure my 95 LT1 car had the big 13" rotors
Safety Car
Joined: Jan 2004
Posts: 3,556
Likes: 13
Safety Car
Joined: Jan 2004
Posts: 3,556
Likes: 13
Extra offset for the larger rotor is obtained by repositioning the mounting holes on the abutment bracket
where it bolts to the spindle
J55 bracket shown
12" abutment bracket doesn't have the " ears" and bolt holes are as marked
putting bracket closer to the hub centerline
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