The 1947 - Present Chevrolet & GMC Truck Message Board Network

The 1947 - Present Chevrolet & GMC Truck Message Board Network (https://67-72chevytrucks.com/vboard/index.php)
-   The 1967 - 1972 Chevrolet & GMC Pickups Message Board (https://67-72chevytrucks.com/vboard/forumdisplay.php?f=3)
-   -   CPP rear disc question (https://67-72chevytrucks.com/vboard/showthread.php?t=796599)

novice 11-13-2019 08:16 PM

CPP rear disc question
 
1 Attachment(s)
Is this the normal surface area coverage for rear brakes? Seems awfully small surface coverage.

novice 11-13-2019 08:49 PM

Re: CPP rear disc question
 
Any help appreciated.

geezer#99 11-13-2019 09:41 PM

Re: CPP rear disc question
 
Looks right.
Rear brakes only do 30% of the braking so no huge Calipers are needed.

novice 11-13-2019 10:04 PM

Re: CPP rear disc question
 
Quote:

Originally Posted by geezer#99 (Post 8626661)
Looks right.
Rear brakes only do 30% of the braking so no huge Calipers are needed.

Thank you. Just looks odd to me.

BigBird05 11-13-2019 10:11 PM

Re: CPP rear disc question
 
You should have full pad contact.

clay68c10 11-13-2019 10:42 PM

Re: CPP rear disc question
 
Definitely not getting full pad contact. How many miles have you driven it? The pads don’t always make even contact right out of the box, but should wear in within a couple of miles.
It looks like the bracket/caliper is a bit too far out (or maybe crooked) but I’m not familiar that particular setup.

KMC3420 11-13-2019 10:52 PM

Re: CPP rear disc question
 
1 Attachment(s)
I agree, looks like the pad is not making full contact. Do you have any miles on this setup?

Is this the kit?
CPP kit

novice 11-14-2019 08:11 AM

Re: CPP rear disc question
 
Quote:

Originally Posted by KMC3420 (Post 8626711)
I agree, looks like the pad is not making full contact. Do you have any miles on this setup?

Is this the kit?
CPP kit

I don't even have a full mile on it yet.

Yes it is a CPP setup.

KMC3420 11-14-2019 11:40 AM

Re: CPP rear disc question
 
Quote:

Originally Posted by novice (Post 8626814)
I don't even have a full mile on it yet.

Yes it is a CPP setup.

Is the brake pad extending past the rotor any? The picture makes it look that way, but that might not be the case.

novice 11-14-2019 11:52 AM

Re: CPP rear disc question
 
Quote:

Originally Posted by KMC3420 (Post 8626899)
Is the brake pad extending past the rotor any? The picture makes it look that way, but that might not be the case.

I'll take a look and better pictures this afternoon.

novice 11-15-2019 10:32 AM

Re: CPP rear disc question
 
Quote:

Originally Posted by novice (Post 8626907)
I'll take a look and better pictures this afternoon.

Apparently I can't upload pictures now.

However, only the top section of the brakes are touching and the pads do not extend past the rotor. So like previously suggested, the brakes may just have to be "worn in" more.

BigBird05 11-15-2019 11:21 AM

Re: CPP rear disc question
 
What does the contact pattern look like on the back side? Brakes should fit when installed, not have to "wear in" to get full contact. You should contact CPP.

KMC3420 11-15-2019 11:24 AM

Re: CPP rear disc question
 
Quote:

Originally Posted by novice (Post 8627433)
Apparently I can't upload pictures now.

However, only the top section of the brakes are touching and the pads do not extend past the rotor. So like previously suggested, the brakes may just have to be "worn in" more.

If you have 100% brake pad contact on your rotor then it is setup as it should be. Putting some miles on it will show you the wear pattern and you will be able to better determine at that time. My wife's Subaru has small rotors and pads such as yours on the rear, but the front is much beefier, as I suspect your truck is as well. What do you mean by only the top section of the brakes are touching?

KMC3420 11-15-2019 11:39 AM

Re: CPP rear disc question
 
1 Attachment(s)
Quote:

Originally Posted by BigBird05 (Post 8627456)
What does the contact pattern look like on the back side? Brakes should fit when installed, not have to "wear in" to get full contact. You should contact CPP.

This is accurate, the Brake pads should sit parallel to the rotor. Are you stating that the brake pad is only touching the rotor in the area in red below, hence the original pattern we are seeing. It appears based on what you are saying the brake pad is only engaging the rotor 1/4 of the way, and it should have a full wear pattern, the width of the brake pad, on your rotor. Did your brake conversion kit come with any shims for behind the mounting bracket?

novice 11-15-2019 11:55 AM

Re: CPP rear disc question
 
2 Attachment(s)
Maybe they'll work

novice 11-15-2019 11:57 AM

Re: CPP rear disc question
 
2 Attachment(s)
Couple more

novice 11-15-2019 11:59 AM

Re: CPP rear disc question
 
2 Attachment(s)
Last two

BigBird05 11-15-2019 07:47 PM

Re: CPP rear disc question
 
The photo in frame #15 looks like the inside brake pad is very small. It should be the same size as the out side pad. You might have the wrong set of pads.

novice 11-15-2019 09:19 PM

Re: CPP rear disc question
 
Quote:

Originally Posted by BigBird05 (Post 8627645)
The photo in frame #15 looks like the inside brake pad is very small. It should be the same size as the out side pad. You might have the wrong set of pads.

Perhaps. I've verify but as you can see in the next to last photo, the coverage area of the inside pad is nearly the entire rotor surface.


All times are GMT -4. The time now is 08:19 AM.

Powered by vBulletin® Version 3.8.11
Copyright ©2000 - 2025, vBulletin Solutions Inc.
Copyright 1997-2025 67-72chevytrucks.com