C5 Brake up grade question.
Thread Starter
Burning Brakes
Joined: Oct 2010
Posts: 1,160
Likes: 23
From: Prescott AZ
C5 Brake up grade question.
Hi guys,
I've been looking at different brake set ups for my car (1993 ZR1). I see that some guys are using the C5 brakes. Doesn't look like much of an upgrade from my ZR1 set up, but was just curious if they can use the C5 brakes because the C4 and C5 spindles are the same size?
Thanks
I've been looking at different brake set ups for my car (1993 ZR1). I see that some guys are using the C5 brakes. Doesn't look like much of an upgrade from my ZR1 set up, but was just curious if they can use the C5 brakes because the C4 and C5 spindles are the same size?
Thanks
Thread Starter
Burning Brakes
Joined: Oct 2010
Posts: 1,160
Likes: 23
From: Prescott AZ
Thanks coupe89. When you say brackets, am I to assume you are referring to the caliper mounting brackets. If so, I thought that would be the case. What I was really curious about is are the spindles the same so that the C5 rotor will fit directly onto the C4 spindle?
Team Owner
Joined: Dec 1999
Posts: 34,873
Likes: 487
From: Lacey WA RVN 68-69
NCM Sinkhole Donor
Your car should have the J55 big brake package. The rotors are already 13" in diameter. Have you tried different pads to get improved braking performance?
Also, the OEM "sawblade" wheels will not clear the C5 caliper without some grinding of the outside edges of the C5 caliper or removal of some wheel material where the wheel center meets the rim. It's easier to go to a set of the ZR-1/Grand Sport 5-spoke wheels.
The "brackets" are a custom piece that bolts to the knuckle and the C5 caliper abutment (mounting) brackets bolt to those. That additional bracket provides the necessary offset for the C5 caliper and rotor.
Figure on something like $700 to $750 for a C5 conversion package.
Look at this post and scroll down to the part numbers and pics.
Also, the OEM "sawblade" wheels will not clear the C5 caliper without some grinding of the outside edges of the C5 caliper or removal of some wheel material where the wheel center meets the rim. It's easier to go to a set of the ZR-1/Grand Sport 5-spoke wheels.
The "brackets" are a custom piece that bolts to the knuckle and the C5 caliper abutment (mounting) brackets bolt to those. That additional bracket provides the necessary offset for the C5 caliper and rotor.
Figure on something like $700 to $750 for a C5 conversion package.
Look at this post and scroll down to the part numbers and pics.
Last edited by c4cruiser; Feb 15, 2012 at 09:10 AM.
Le Mans Master
Joined: Mar 2001
Posts: 7,999
Likes: 14
From: Life is just one big track event. Everything before and after is prep and warm-up and cool-down laps
Cruise-In III Veteran
Cruise-In IV Veteran
St. Jude Donor '12
For street driving, autocross and HPDE track sessions your J55's are adequate!
If you do a lot of braking from 125+ down to 45 then you can find the inadaquacies with them.
I run Carbotech xp12/10 on mine that sees a LOT of track time. I'm starting to get tired of caliper spread and constantly replacing calipers. So I'm going big brakes, probably a willwood 6 pot for the front and a 4 pot for the rear.
The C5 brakes are slightly better than the J55, takes a little longer to spread the caliper. In my case it costs the same amount of points to go C5 brakes or willwood brakes. For me its a no-brainer to go willwood.
If you do a lot of braking from 125+ down to 45 then you can find the inadaquacies with them.
I run Carbotech xp12/10 on mine that sees a LOT of track time. I'm starting to get tired of caliper spread and constantly replacing calipers. So I'm going big brakes, probably a willwood 6 pot for the front and a 4 pot for the rear.
The C5 brakes are slightly better than the J55, takes a little longer to spread the caliper. In my case it costs the same amount of points to go C5 brakes or willwood brakes. For me its a no-brainer to go willwood.
Thread Starter
Burning Brakes
Joined: Oct 2010
Posts: 1,160
Likes: 23
From: Prescott AZ
For street driving, autocross and HPDE track sessions your J55's are adequate!
If you do a lot of braking from 125+ down to 45 then you can find the inadaquacies with them.
I run Carbotech xp12/10 on mine that sees a LOT of track time. I'm starting to get tired of caliper spread and constantly replacing calipers. So I'm going big brakes, probably a willwood 6 pot for the front and a 4 pot for the rear.
The C5 brakes are slightly better than the J55, takes a little longer to spread the caliper. In my case it costs the same amount of points to go C5 brakes or willwood brakes. For me its a no-brainer to go willwood.
If you do a lot of braking from 125+ down to 45 then you can find the inadaquacies with them.
I run Carbotech xp12/10 on mine that sees a LOT of track time. I'm starting to get tired of caliper spread and constantly replacing calipers. So I'm going big brakes, probably a willwood 6 pot for the front and a 4 pot for the rear.
The C5 brakes are slightly better than the J55, takes a little longer to spread the caliper. In my case it costs the same amount of points to go C5 brakes or willwood brakes. For me its a no-brainer to go willwood.
I've got to agree with you on the willwood. That is what I was planning on going with also. I do plan on seeing quite a bit of track time.
Thanks,
Rob
Supporting Vendor
Joined: Oct 2002
Posts: 50,279
Likes: 518
From: Cleveland OH
St. Jude Donor '11,'13
I will be happy to help you with track pads for your application.
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