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Old 02-16-2012, 06:58 AM
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Disc Brake Question.

I have a '68 Camaro which came with the original 4-piston brake caliper. After several rebuilds (and lots of $$$) i gave up on them and installed a single piston conversion system. I believe that the new brakes are referred to as D52 style brakes.

The brakes work fine, but they do not seem to have the same stopping power as I am used. Admittedly, I don't know what this particular car brake system should feel like as I never had a proper working front brake system....but compared to other cars I have driven (new and old), it doesn't seem to have that snap stopping capability. (Am I making a mistake comparing this to a modern disc brake system?)

BTW, master cylinder, flex hoses, lines, booster and complete rears (drum) brakes have all been replaced/rebuilt. The system has been purged properly.

Is this a result of the replacement cast iron single piston caliper? Will I get better results with something like a Wilwood dual calipers?
Input and opinions welcome.
Thanks!
Vic Brincat

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Old 02-16-2012, 07:08 AM
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Quote:
Originally Posted by cadmanof50s
I have a '68 Camaro which came with the original 4-piston brake caliper.

bingo! you down graded the stopping efficiency with single piston calipers. To increase the stopping power of disc brakes two things are needed, more pistons and bigger rotors, pay close attention to the race car builders, notice the hardware in play.
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Old 02-16-2012, 09:21 AM
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Quote:
Originally Posted by unix
bingo! you down graded the stopping efficiency with single piston calipers. To increase the stopping power of disc brakes two things are needed, more pistons and bigger rotors, pay close attention to the race car builders, notice the hardware in play.
The issue isn't "more pistons", it's clamping force. A single piston caliper works fine on my 7,000 lb crewcab dually. It's piston AREA that matters. The single piston calipers work fine if you've properly matched the master cylinder and properly bled the system. Increasing the number of pistons only helps if this increases the total piston area.
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Old 02-16-2012, 10:14 AM
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Both the previous answers are correct. You might try some different pads, Pad composition can affect braking. take a look at some of the speed stores and see if anything is available. It's gotta be cheaper then replacing calipers brackets and rotors. It's a place to start.
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Old 02-16-2012, 10:54 AM
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Thanks folks. Great input.

Let me start off with the cheapest approach....replacing the pads.

Should I be looking for semi-metalic, cermaic or organic pads?

Vic Brincat
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Old 02-16-2012, 11:52 AM
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Material does not really matter. What is important is the friction code On the edge of the pad there will be a friction code printed, usually two letters, as in FF. First letter is cold friction, second is hot friction. The higher the letter, the more agressive the brake pad is.

You should also bed your brakes in for top performance http://www.zeckhausen.com/bedding_in_brakes.htm

This can make a huge difference, particularly with high performance brakes, but should be done with all brakes.
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Old 02-16-2012, 12:02 PM
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Can't answer that question. I just went Summit Racing's site went to the brake pad section and found a interesting article about different brake pads and there use called "How to choose disc brake pads". Go there yourself and do a little research about what different pads can do for your personal requirements .
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