Home Corvette modifications


Big front brakes

The problem with most big brake kits is that you can not use the stock 16" rims.
I did some research and bought rotors from a BMW E39 540i (2003-). The BMW rotors are 324mm x 30mm, almost exactly the same as the Corvette C5 rotors, 325mm x 32mm.
The differance compared to the C5 rotors is that they have much more 'backspace'. The C5 rotors are almost flat.
The extra backspace makes room for Wilwood Forged Superlite 4-piston calipers in the stock 16" x 9.5" rims without any spacers.


My stock rotor compared to the BMW rotor and mounted on the Corvette:

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The bolt pattern and 'backspace' of the rotors are perfect.
The center hole is a bit too big so you must make an adapter ring in a lathe to center the rotor on the hub.
You also have to modify the rotor in a lathe. Remove the inner rotor near the center to clear the caliper bolts on the knuckle.
The outer diameter on the Corvette hub was slightley too big and the rotor got a bit narrower near the hub mounting surface, so I removed some material from the rotor there too.
The removed areas are marked red in this picture and you can also see both modifications on the picture:
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A bought Wilwood Forged Superlite for 1.25" wide rotors.
http://www.wilwood.com
They are available with different piston sizes.

This is a mock up caliper bracket I made.
The real bracket will be made from thicker aluminum.
As you see in the last picture the caliper has to be moved out slightly.
For extra support I will use distances and bolt the bracket to the original caliper mountings too.

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More picutures:

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