Starting a group buy for brackets to fit 13" brakes from the C5 Corvette on the front of the 84-87's
The calipers come from Corvettes years 1996-2004 (Generation C5) and the stock rotors are approximately 13" in diameter. The calipers and rotors are plentiful (and relatively cheap) since the Corvette guys like to upgrade as well. The front Corvette calipers are very light as they are made from aluminum.
The brackets are waterjet cut from 6061 Aluminum (with TIG welded bosses) and are very light. They position the caliper so that there should be no interference with any of the suspension components at full lock (with the vehicle on the ground).
These front brakes are a great match with the 11.25" rear brakes from the "Lebaron" swap, or if you have 12" rear brakes from the C4 Corvette swap. I am personally using the rear Lebaron swap with my 13" Corvette brakes up front and I have not found that I need to increase rear bias. The brake balance is great.
What you will need extra are concentric rings for the front rotors (as well as having the rotors drilled to 5x100 bolt pattern)
and the hardware (I can source the hardware if many people request it):
(4) M14 x 40 hex bolts (Grade 10.9 or better) (4) M12 (1.75 thread) x 30 hex bolts (Grade 10.9 or better)
As with every other brake swap, keep in the mind the following:
Make sure 13" brakes fit inside your wheels. 17" wheels minimum, and you can print / cut out a template from here to see if the caliper/rotor offset works with your wheels:
Price will be $140 for the front brackets. Please post or pm me if interested. I am looking to get a minimum of 5 people in the group buy before I can make them .
Thank you!
Feel free to ask any questions you might have.
I would also like to add a general disclaimer... Intended for off road use only. I will not be held responsible for any injury or damage related to the use of these brackets. ------------------ Check out my build and my website! https://www.fiero.nl/forum/Forum3/HTML/000100.html Embrace Racing
[This message has been edited by doublec4 (edited 05-11-2013).]
Finally someone decided to make these brackets up. These calipers are so plentiful and they are one of the best brake upgrades out there. Hopefully we can get 4 more people in on the group buy. Just let me know where and when you need the money and I will get it to you. Thank you for making these, Daniel
It would be awesome if you could use calipers and 14in rotors from a 2009 to present camaro ss, z06, cadilac ctsv. They are 4 piston calipers. I put them on my z24.
That was faster than I thought. I'll leave this open for a few more days, let some other people see this. I'll definitely be doing a batch by the looks of it.
Just to confirm what has already been posted, the Corvette front calipers are dual piston calipers. Your stock brake lines will work with these as well, I didn't have to modify mine at all. Bleeders will correctly face upwards.
just for info, the 98-04 Camaro calipers are the same without CORVETTE script and can be bought cheap..
This is true, however, I cannot confirm that the abutment bracket is the same for the Camaro calipers. If someone wants to try, that would be great. Otherwise you can still use the Camaro calipers with the Corvette abutment brackets from my understanding.
Tell me about the centering rings, and where one might get 'em! If I can reasonably source them, I'm in for brackets as well!
You can get them from several different vendors on this site, or you can just take that drawing I posted to your local machine shop and they should be able to make you a set while they drill your rotors to 5x100 bolt pattern.
Since they are not load bearing, if you know anyone with a 3D printer, you can get them to print you off a set in plastic. That's what I did and it worked out great! (For an extra $10 I can have him print you off a set if you order the brackets, just let me know)
[This message has been edited by doublec4 (edited 05-10-2013).]
Looks real good. From the responses I've seen in the past, a good 13" option for the 84-87 years was needed. It shouldn't be too hard to determine if the Corvette and F-body abutment brackets are the same (Rock auto p/ns?). Good luck with the sale...
Looks real good. From the responses I've seen in the past, a good 13" option for the 84-87 years was needed. It shouldn't be too hard to determine if the Corvette and F-body abutment brackets are the same (Rock auto p/ns?). Good luck with the sale...
(and bump)
Bob
Thank you,
I haven't had time to confirm the part numbers but I have a feeling they are different numbers. However, that doesn't rule out that they aren't the same. I actually used the Camaro slider pins on my calipers (which were a different part number) and they are dimensionally identical. The Corvette pins were twice as expensive and they didn't have any in stock. So I went with the Camaro ones since I knew the calipers were virtually identical and they fit fine.
You can get them from several different vendors on this site, or you can just take that drawing I posted to your local machine shop and they should be able to make you a set while they drill your rotors to 5x100 bolt pattern.
Since they are not load bearing, if you know anyone with a 3D printer, you can get them to print you off a set in plastic. That's what I did and it worked out great! (For an extra $10 I can have him print you off a set if you order the brackets, just let me know)
Sounds great - sign me up for the brackets and the rings. It's just easier to get everything in one place.
just for info, the 98-04 Camaro calipers are the same without CORVETTE script and can be bought cheap..
Just to let you know, camaro calipers are weaker and thinner then corvette calipers. It is the difference in how they pour the metal into the mold. Also I believe the corvette has slightly bigger pistons. The camaro ones heat up quicker too and have smaller vents/ louvers.
There are several people who have "big brake" upgrades that have not increased the bore size of their master cylinder and they report that the don't need it. You can always go that route and then upgrade the master cylinder afterwards if you feel that you need to move more fluid. Remember that a bigger master cylinder will result in a pressure drop in your hydraulic system. However, with the larger caliper pistons requiring more fluid, you may need the bigger MC bore. It's a trade off.
If you've got the ability to 3D print plastic centering rings for the brakes, how hard would it be to make a ring that is 10mm or so thicker than the rotor, and stepped on the OD - first step with ID of the Corvette rotor, and the second step 73mm thick to center aftermarket wheels? If that's something you can do, it'd be amazing! I would definitely be willing to pay extra for that! Maybe put a slight bevel on the very outer edge to ease the wheel install?
[This message has been edited by thesameguy (edited 05-14-2013).]
If you've got the ability to 3D print plastic centering rings for the brakes, how hard would it be to make a ring that is 10mm or so thicker than the rotor, and stepped on the OD - first step with ID of the Corvette rotor, and the second step 73mm thick to center aftermarket wheels? If that's something you can do, it'd be amazing! I would definitely be willing to pay extra for that! Maybe put a slight bevel on the very outer edge to ease the wheel install?
Can very easily be done.
I did (sort of) the same thing with my car. I made a stepped adapter that went from the ID of my wheel spacer, back to the OD of the stock hub so my concentric wheel rings still worked:
All I need are dimensions and I can easily have any step/ring/adapter made. Since the 3D printing process (on DIY machines) can have somewhat large tolerances, you may have to sand them down a little if the fit is too tight. It's just plastic so it's quite easy to do.
I did (sort of) the same thing with my car. I made a stepped adapter that went from the ID of my wheel spacer, back to the OD of the stock hub so my concentric wheel rings still worked:
That was my first thought, but I didn't especially like the idea of a plastic centering ring being centered on a plastic centering ring.
The wheels I'm running are Kosei K1-TS with a 73mm hub bore (http://www.koseijp.co.jp/engfl/NewPage08/Product/Specs/K1-TS.htm). A centering ring with Fiero ID (57.1mm?) and an inner OD of [Corvette Rotor] and an outer OD of 73mm would be perfect. I don't know the hat thickness of the Corvette rotor nor the hub ID, but I imagine you do. The 73mm OD section probably doesn't haven't to be too thick - I think 8-10mm is customary? If you have the ability to bevel the outer edge to make slipping the wheel on easier, that would be great, but if not - as you say - I can just sand one into it.
That was my first thought, but I didn't especially like the idea of a plastic centering ring being centered on a plastic centering ring.
The wheels I'm running are Kosei K1-TS with a 73mm hub bore (http://www.koseijp.co.jp/engfl/NewPage08/Product/Specs/K1-TS.htm). A centering ring with Fiero ID (57.1mm?) and an inner OD of [Corvette Rotor] and an outer OD of 73mm would be perfect. I don't know the hat thickness of the Corvette rotor nor the hub ID, but I imagine you do. The 73mm OD section probably doesn't haven't to be too thick - I think 8-10mm is customary? If you have the ability to bevel the outer edge to make slipping the wheel on easier, that would be great, but if not - as you say - I can just sand one into it.
Thanks!
No problem that's easy. Might cost a few dollars more since my 3D printing guy charges based on volume of the piece but it can be done. I can do a quick model in CAD.
I would definitely be willing to pay extra for that! Maybe put a slight bevel on the very outer edge to ease the wheel install?
