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Old 07-02-2017, 12:02 AM   #1
metalprelude
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CPP Disc Conversion - Good and Bad

Finally finished the Classic Performance front disc conversion on my 61. It looks amazing. I hit some speed bumps around a stripped brake line and disentegrated ball joint bushings but, overall it was pretty easy with some googling.

Energy Suspension makes some really affordable bushing replacements and I went ahead and replaced the outer tie rod ends with new Moog pieces. Additionally, I learned how to use a flaring tool and took the opportunity to pressure-wash the A arms and suspension.

Here's my remaining issues and I'd love some guidance-
  1. My factory steelie rims are too small for the new brake setup. Anyone know the wheel specs required for the CPP Conversion?
  2. I can't get the brake pressure to build. I've verified there are no leaks but, even with a Mityvac, I can't get the hydraulic pressure to build. Any ideas?

I attached a before and after shot.
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Old 07-02-2017, 12:09 AM   #2
Chevy Fleetside
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Re: CPP Disc Conversion - Good and Bad

70's 4x4 wheels will work.
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Old 07-02-2017, 12:15 AM   #3
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Re: CPP Disc Conversion - Good and Bad

For the pressure issue, try adjusting the rod that's attached to the brake pedal in so it engages sooner.
For your current Steelies not fitting could be because you are using original steelies that don't work with discs. You need 6-lug steelies from a newer truck that had discs.
There's threads on both these topics.
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Old 07-02-2017, 09:56 AM   #4
1966burb
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Re: CPP Disc Conversion - Good and Bad

I used 15 x 6 OEM wheels from a 72 K5 4x4 Blazer and they worked great. j
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Old 07-02-2017, 07:35 PM   #5
MikeN
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Re: CPP Disc Conversion - Good and Bad

I can't see the bleeder screw on your caliper in the photo. The bleeder screw has to be at the top of the caliper. L & R calipers are therefore different.
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Old 07-03-2017, 12:10 PM   #6
slepysal
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Re: CPP Disc Conversion - Good and Bad

Two things come to mind First one did you bench bleed the master cylinder?
Second are you running a power booster ? If so you may need to drill a new attachment hole on your brake pedal arm about 1/2 lower from the old one.
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Old 07-04-2017, 01:21 AM   #7
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Re: CPP Disc Conversion - Good and Bad

Was it bench bled properly was my thought also. Are you running a prop valve? I know they can trip and give you grief. On the wheel issue, I'm not sure how much clearance you need, but, mine were so close on my 58 that they rub UNTIL you tighten them down all the way. Then they have maybe an ⅛" clearance, maybe. You can use a grinder on the calipers if it's just an RCH, or run spacers? OR use it as an excuse to go get a new set of wheels and tires...
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Old 07-04-2017, 04:40 PM   #8
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Re: CPP Disc Conversion - Good and Bad

A bolt on 1" wheel spacer will let you run your stock wheels. I had a set of 1.5" spacers on my '66 which pushed the stock skinny wheels out to match the wheel fitment of the 8" rear wheels.
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Old 07-06-2017, 10:17 AM   #9
slepysal
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Re: CPP Disc Conversion - Good and Bad

Any updates?
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Old 07-08-2017, 11:05 AM   #10
metalprelude
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Re: CPP Disc Conversion - Good and Bad

I determined that I had my brake lines reversed. I flipped them over and was able to bleed the calipers. The pressure is still not as firm as I'd like but, it's better.

In regard to the rims, I've decided to buy the Cragar rims shown below as they'll fit my Coker white walls at 15x7 and at $60, I can't beat it.

https://www.summitracing.com/parts/crr-69576037

Anyone have experience with these?
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Old 07-08-2017, 11:14 AM   #11
metalprelude
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Re: CPP Disc Conversion - Good and Bad

Quote:
Originally Posted by MikeN View Post
I can't see the bleeder screw on your caliper in the photo. The bleeder screw has to be at the top of the caliper. L & R calipers are therefore different.
You were correct. I had the calipers swapped. I fixed it when I fixed the backwards brake lines.
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Old 07-08-2017, 11:17 AM   #12
metalprelude
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Re: CPP Disc Conversion - Good and Bad

This also helped:
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Last edited by metalprelude; 07-08-2017 at 11:18 AM. Reason: Added photo
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Old 07-08-2017, 10:53 PM   #13
MikeN
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Re: CPP Disc Conversion - Good and Bad

Glad you got it fixed.
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Old 07-15-2017, 11:02 PM   #14
KALAHEO
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Re: CPP Disc Conversion - Good and Bad

Wheel Vintiques has steel wheels that will fit and look close to OEM
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Old 07-17-2017, 12:49 PM   #15
PMDc
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Re: CPP Disc Conversion - Good and Bad

I bought a set of rims just like this but are US Wheel brand. I am in the process of making buttons to pop my original hub caps on.

I was too cheap to pony up for the Wheel Vintiques at $200+ each for the same size wheel.
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