C4 Brake upgrade
Thread Starter
Race Director
Joined: Sep 1999
Posts: 10,008
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From: cincinnati ohio
CI 5-6-7-8-9-10 Veteran
C4 Brake upgrade
I have an '87 and I am in the process of gathering parts for an upgrade to the C5 brakes. I have already purchased, from Electro-Dynamics, the adapter for the front brakes/ C5 caliper. I also want to put the C5 front rotor and caliper on the rear. I still have to purchase that adapter. I am going to have the adapter notched for parking brake assembly . Is there much trouble putting the C5 parking brake onto the '87 C4? Will I have a direct hookup once the adapter is modified for the parking brake? Thanks
Team Owner
Joined: Sep 2001
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From: Athens AL
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Re: C4 Brake upgrade (lemans396)
doubtful unless your rear brakes are bad or the car has been lowered too much
Thread Starter
Race Director
Joined: Sep 1999
Posts: 10,008
Likes: 0
From: cincinnati ohio
CI 5-6-7-8-9-10 Veteran
Re: C4 Brake upgrade (codyusa)
I have been told there is a bias spring that can be replaced to allow more braking power to the rear wheels. I don't think it is very expensive .
Team Owner
Joined: Aug 2000
Posts: 40,156
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From: San Pedro CA
Re: C4 Brake upgrade (codyusa)
I have been told there is a bias spring that can be replaced to allow more braking power to the rear wheels. I don't think it is very expensive .
Le Mans Master
Joined: Oct 2000
Posts: 6,362
Likes: 30
From: Oak Harbor WA
Re: C4 Brake upgrade (bogus)
You don't want too much rear braking or else you are liable to induce understeer during corner braking.....Just change the bias spring as mentioned before. There is a reason the GM engineers have the system the way they do, besides the cost savings. :chevy
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Safety Car
Joined: Jul 2001
Posts: 4,178
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From: Windermere FL
Re: C4 Brake upgrade (Goody)
I wouldn't change the rear brakes unless I was going to get better than c5 front brakes. You want your front brakes to be better than the back. You will have the oversteer problem mentioned earlier otherwise. And the C4 rear brakes are better than the C5 rears. I would stick with what you got, put in a bias spring, and match the rear rotors and pads to the fronts and paint the calipers.
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