Difference between 87 and up brake question
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From: Ocean Pines MD
Difference between 87 and up brake question
I just got back from Corvette Carlisle and it really sucked for C4 parts. I did manage to buy a pair of large Wilwood calipers and C4 brackets. He threw in a set of braided lines for front and rear and 2 ecm's, all for $100. So I bought it. I have an 87 and the calipers and mounts came off an 89. I know that the brakes are different but will I be able to make them work. He said they would work with stock rotors. I also know the 88-up rotors are larger. Can I just pick up a set of newer rotors or is there going to be a bigger issue? Thanks
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I did manage to buy a pair of large Wilwood calipers and C4 brackets. I have an 87 and the calipers and mounts came off an 89. I know that the brakes are different but will I be able to make them work. He said they would work with stock rotors. Can I just pick up a set of newer rotors or is there going to be a bigger issue? Thanks
I am not aware of any brackets to mount base (12" rotor ) late calipers to early cars.There are adapter brackets for the J55 /GS calipers on early cars.
Might be making something custom?
Base '88+ rotors are same 12" as early cars but different
J55/GS brakes have 13" rotor ( also thicker than 12" rotor )
Last edited by vetteoz; Aug 29, 2010 at 01:47 AM.
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Originally Posted by blown1981z28;1575159508.
I will get a pair of the 88-up 13" rotors to try.
28mm vs 20mm
Measure the throat of the caliper to see width you have
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From: Ocean Pines MD
They aren't but he said they would work. The Wilwood calipers came off a road race car. He was running 2 piece rotors. I am going to have a both the 88-up 12" and 13" rotors handy to see if I can get either to work. Before I give up on them I am going to give tham a try.
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From: The Motor City
I think the only way they will work is if you use Wilwood rotors. All the Wilwood brake upgrade kits I've seen come with the appropriate Wilwood rotors; never seen a kit that only came with calipers (unless the calipers were purchased individually and the previous owner made his/her own custom brackets to fit the stock rotors).
I'd advise calling Wilwood and ask them if they will fit your car. I'm sure if you provide the part number(s) off the calipers they will be able to tell you whether they will fit and what you'll need in order to complete the install.
I'd advise calling Wilwood and ask them if they will fit your car. I'm sure if you provide the part number(s) off the calipers they will be able to tell you whether they will fit and what you'll need in order to complete the install.
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From: Ocean Pines MD
Wilwood dosen't make a kit for the 87 and earlier fronts. I already searched their website. The stock rotor meets the thickness required for the caliper. I just need a rotor with the right hat height.
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Thread Starter
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From: Ocean Pines MD
I understand that. Wilwood dosen't make one and the max spec for the caliper is a 13" rotor. The rotor size depends on the caliper mount. The calipers I have look to have a pair of one off mounts. They are not a production forged piece. So I will try to bolt them up.
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The point I was making is that the bolt hole spacing on the spindle for the caliper brackets is different between early and late ( later are wider apart ) so irrespective of any other differences; the late style caliper will not bolt directly on to a early spindle