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07-05-2008 #1
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- Dec 2005
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- Germany
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C4 Corvette / PBR brake system => poor performance => why?
Hello !
Now I installed the brake system, which I had questions about installation some weeks ago.
I installed:
92' C4 13" brake rotors used
92' C4 brake calibers used
New brake pads "no name"
new 1" Corvette master brake cylinder
original brake booster
The brake pedal is hard to press, not very sensitive.
It's hard to lock up the front wheels.
(Full brake power to the rear via proportioning valve)
Why this poor performance? Because of the MC diameter => original is 15/16"?
Bad brake pads?
I noticed that the brake performance is a little bit better with some warm up.Night Rider => My car
69'Camaro
92'Corvette LT1 engine, 4L60, shorty headers, Flowmaster, Eibach, Vette wheels=> soon coming:hotchkis leaf springs nova rear w limited slip, Corvette brakes
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07-05-2008 #2
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The 1" bore does supply less pressure than the 15/16" bore. That can certainly be a part of it.
Andrew1970 GTO Version 3.0
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07-05-2008 #3
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- Aug 2005
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- Patterson, NY
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The pads can make a big difference as well. Some need to heat up before they grab.
07-07-2008 #4
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- Nov 2005
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- Auburn, WA
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Did you resurface the rotors before you installed the pads? Most pads require a freshly machined rotor for initial break-in.
Matt Jones
Mechanical Engineer
Art Morrison Enterprises
07-07-2008 #5
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- Jan 2006
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- Oregon
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The C4 ZR-1 MC has a 15/16" bore and a dual-diaphragm vacuum booster if I'm not mistaken...is your application boosted or manual? If you are running a booster, is it functioning properly?
You'll gain some "feel" once the pads are properly bedded-in, but that's going to be tough to do if you can't generate sufficient pressure to adequately actuate the calipers. Besides, most modern street pads will have decent feel and performance from the get go for obvious safety reasons.
Tobin
KORE3It's what I does.
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