C4 Tech/Performance L98 Corvette and LT1 Corvette Technical Info, Internal Engine, External Engine

two brake questions.

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Old Jul 26, 2012 | 11:30 PM
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rithsleeper's Avatar
rithsleeper
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Default two brake questions.

1. Does anyone make a bracket so i can put my stock front calipers on the rear? I did a c5 front upgrade and am really shocked how lame and small the rear pads are for the rear. Seems like using my stock front calipers on the rear would be a great and cost effective balanced option. I have an inline bias adj and a bias spring installed.

2. Would their be any adverse effects by using my hawk racing pads for track and switching back to a pair of crappy pads for street? Id like to make the hawk last, dont want to deal with the noise or dust every day i drive on road...

Thanks all
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Old Jul 27, 2012 | 10:06 AM
  #2  
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ABS still active?

With the C5 calipers you have increased the front brake hydraulic ratio.

C5 caliper 40.5 mm = 1.62 diameter = 8.245 sq in = 13.74 front hydraulic ratio. (figured with 7/8 bore mc)

C4 stock front Hydraulic ratio = 11.78.

C4 stock rear hydraulic ratio = 6.627.

Installing the C4 front calipers on the rear will increase rear brake efficiency, you will need to adjust the prop valve & dial some rear brake out.

You will loose the E brake.

Rear rotors are thinner than stock fronts by approximately 1/4 inch. You may be able to remove the brake material from one of the old pads & use the metal mount plate as a shim to make up the difference in rotor thickness. Will look at some old pads when I get back to the shop & determine if pad shimming using stock pads is possible.

There is also a difference in front/rear rotor height, rotor face to hub face with the rear rotors being shorter than the fronts.

Front caliper abutment brackets may protrude outboard of the rear rotor hub face, if so a wheel spacer could be used.

Do not know of an available bracket C4 front calipers to rear placement however what you plan to do has been done. There was a C4 for sale last year on this 4m with this set up.

As far as pad changing: Some do it, I don't. Once the pads are bedded in pad material is transferred to the rotors to improve bite. Might be better to live with a bit of brake dust & noise.

I like to adjust the rear prop valve when its wet outside. A large parking lot, 30 mph, turn a bit of wheel in & hit the brakes. Keep dialing rear brake out to eliminate rear wheel lock up & spin out. You don't need the tail waggin the dog.

GL
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Old Jul 27, 2012 | 12:10 PM
  #3  
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rithsleeper
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Default

Abs doesnt work, nor would i want it on the track. Well i wouldnt use rear rotors with front calipers... i have the front calipers and rotors. I believe i would just need a bracket to change the mounts. I run 17" a molds so clearance isnt issue in rear. I figured i would need to dial in pressure.

So does anyone know anyone that makes the mounting bracket for something like this?
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