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  #16 (permalink)  
Old 05-29-2009, 08:48 AM
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I thought of that but for some reason all the parts stores such as napa the zone etc. are showing the same # for the calipers from 79 to 87 like they consolidated and .Build either all low drag or all non low drag calipers to save money.Tried the s10 manual master no volume to the rear brakes.Again could have been a bad master.Switched to 79 camaro with bigger cyl and got brake pressure now.Just have to remove the residual pressure valve, this weekend project.This thing should hit 100 or more in the 1/8 so I really want to be able to stop.

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  #17 (permalink)  
Old 05-29-2009, 10:34 AM
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Quote:
Originally Posted by barnym17
I thought of that but for some reason all the parts stores such as napa the zone etc. are showing the same # for the calipers from 79 to 87 like they consolidated and .Build either all low drag or all non low drag calipers to save money.
That really sucks to hear I hadn't thought of that. I wonder if the aftermarket Howe or Wilwood calipers are made as non-low drag http://www.howeracing.com/p-7709-how...le-piston.aspx

Quote:
Originally Posted by barnym17
Tried the s10 manual master no volume to the rear brakes.Again could have been a bad master.
Something wasn't right...and I have had bad master cylinders from the parts store before. Did you have any kind of valve (like a combination/proportioning valve) in the brake system?
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Old 05-29-2009, 11:14 AM
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Yes I did, removed it as I changed masters (I think ) this build has been going on to long.May give the s10 master another try.
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Old 05-29-2009, 11:16 AM
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Triage what about oem calipers pre-83 would this help the issue?
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Old 05-29-2009, 11:28 AM
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From everything I have read '83 was when GM started using low-drag calipers and step-bore master cylinders.
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Old 05-29-2009, 01:15 PM
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I have found that the low drag calipers you get from parts stores are mixed in with the standard ones.
Example: I bought a GM metric caliper to use a a mockup in the shop, bought it from my local parts house, a small franchise that uses the Parts + brand. Even though I specified a 77 Monte Carlo..I got a low drag caliper in the box...

I made a thread about the dreaded low drag calipers a few weeks ago.
Test for low drag calipers

The Raybestos brake technician's service manual I have says that GM started putting these on cars in 1980. It does not specify which cars they came out on initially.

I'm really interested to see how the S-10 master will work in a non boosted application.

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Old 05-30-2009, 05:57 AM
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we're going to find out as soon as I get the honey do list out of the way.
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