Author Topic: making stock brakes great again  (Read 6171 times)

Offline gwcrim

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making stock brakes great again
« on: December 20, 2016, 06:34:02 AM »
In this thread:  http://forum.73-87chevytrucks.com/smforum/index.php?topic=27999 the idea is put forth that the stock brakes, if "up to snuff" are pretty darn good.  I want to believe that and I want to achieve that.

My 1980 C10 needs help.  It rolled out of the factory with non-power disk/drums.  I've recently replaced the master cylinder, disks, calipers, hoses, pads and had the drums turned.  The pedal is not firm and the rear brakes lock up early.  I did the front, I had a mechanic do the rear. I took it to a shop and had them bled.  In my opinion, they suck.

In October the poor truck ended up on a guard rail because the rear end locked up.  This needs fixed.

What specifically can I do to make my stock brakes great again?

Online zieg85

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Re: making stock brakes great again
« Reply #1 on: December 20, 2016, 07:32:45 AM »
First off if the pedal isn't firm there is air in it somewhere.  Did you bench bleed the master before you put it on?
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1985 C20 Scottsdale 7.4L 4 speed 3.21
1986 C10 under construction
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Offline gwcrim

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Re: making stock brakes great again
« Reply #2 on: December 20, 2016, 07:46:20 AM »
No, it was not.

Offline gwcrim

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Re: making stock brakes great again
« Reply #3 on: December 20, 2016, 07:58:13 AM »
It was bled after installation. I've done it this way in the past on my `70 Challenger and it worked fine.

Online zieg85

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Re: making stock brakes great again
« Reply #4 on: December 20, 2016, 04:35:27 PM »
Some work fine while others don't.  You need to bench bleed it.  You don't need to take it off the truck but take the lines off and return it back into the reservoir to get all the bubbles out.
1985 C30 Custom Deluxe Ext. cab 5.7L TH400 3.21 
1985 C20 Scottsdale 7.4L 4 speed 3.21
1986 C10 under construction
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Offline VileZambonie

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Re: making stock brakes great again
« Reply #5 on: December 20, 2016, 05:31:14 PM »
You need to bench bleed the MC or air will be trapped in the system. Nevertheless if your truck is equipped without power brakes, they will never perform well. At the very least I would recommend upgrading to power brakes.

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Online zieg85

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Re: making stock brakes great again
« Reply #6 on: December 20, 2016, 05:44:30 PM »
You need to bench bleed the MC or air will be trapped in the system. Nevertheless if your truck is equipped without power brakes, they will never perform well. At the very least I would recommend upgrading to power brakes.

I'd put my manual against any power brakes.  Yes it requires more foot/leg pressure but mine stops as good as any...
1985 C30 Custom Deluxe Ext. cab 5.7L TH400 3.21 
1985 C20 Scottsdale 7.4L 4 speed 3.21
1986 C10 under construction
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Offline VileZambonie

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Re: making stock brakes great again
« Reply #7 on: December 20, 2016, 06:28:17 PM »
You need to bench bleed the MC or air will be trapped in the system. Nevertheless if your truck is equipped without power brakes, they will never perform well. At the very least I would recommend upgrading to power brakes.

I'd put my manual against any power brakes.  Yes it requires more foot/leg pressure but mine stops as good as any...

lol okay let's race....or stop I mean
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Offline bd

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Re: making stock brakes great again
« Reply #8 on: December 20, 2016, 06:29:39 PM »
Race to a stop....  What a novel idea!  lol
Rich
It's difficult to know just how much you don't know until you know it.
In other words... if people learn by making mistakes, by now I should know just about everything!!!
87 R10 Silverado Fleetside 355 MPFI 700R4 3.42 Locker (aka Rusty, aka Mater)

Offline VileZambonie

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Re: making stock brakes great again
« Reply #9 on: December 20, 2016, 06:39:02 PM »
I remember back when we had DMV inspections and part of the inspection was the stopping pad. So we had a guy with a C10 6 cyl, 3 on the tree, manual steering, manual brakes long bed. The DMV guy kept failing him even though the brakes were as true as they could be. I finally got the inspector to allow me to perform the stop after the 3rd fail because truly he couldn't operate it correctly. All I know is there was nothing enjoyable about driving or stopping that truck!
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Offline hatzie

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Re: making stock brakes great again
« Reply #10 on: December 20, 2016, 07:48:03 PM »
Don't just upgrade the Master and booster.  It's a system. 
You will need the proper pushrod and pedal.   
You'll need to do some research to make sure the non power calipers, drum components, and combination valve are the same as the power setup.
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Offline gwcrim

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Re: making stock brakes great again
« Reply #11 on: December 20, 2016, 07:59:12 PM »
My Challenger was pretty stout for a street car.  It had 11" manual DRUMS on all 4 corners.  Fred Flintstone had a better set up.  It shook like a dog passing a peach pit.

I drove this truck home the day my dad bought it brand new.  The brakes were good enough new.  Something isn't right now.  Even though I bled the MC several times with a helper, I suppose that could be the problem.  During my online research today, someone somewhere mentioned that the pedal and rod won't push all the air out.

Not looking forward to this.  Brake fluid everywhere.  Climbing under the dash.  Blah!

Offline bd

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Re: making stock brakes great again
« Reply #12 on: December 20, 2016, 08:13:05 PM »
In general, it sounds like a tripped combination valve, because of air trapped in the front half of the system.  Does the park brake warning lamp illuminate with ignition on?
Rich
It's difficult to know just how much you don't know until you know it.
In other words... if people learn by making mistakes, by now I should know just about everything!!!
87 R10 Silverado Fleetside 355 MPFI 700R4 3.42 Locker (aka Rusty, aka Mater)

Offline gwcrim

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Re: making stock brakes great again
« Reply #13 on: December 20, 2016, 08:15:56 PM »
In general, it sounds like a tripped combination valve, because of air trapped in the front half of the system.  Does the park brake warning lamp illuminate with ignition on?

I thought about that but the light doesn't come on.  It sure is in a hard to get to location.

Offline bd

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Re: making stock brakes great again
« Reply #14 on: December 20, 2016, 08:27:47 PM »
As in, never illuminates under any circumstances - even when the park brake is set?  Is the tan wire connected to the switch on the combination valve?  Does the dash telltale illuminate if you ground the tan wire at the combination valve?  Generally, the valve can be recentered w/o removal.
Rich
It's difficult to know just how much you don't know until you know it.
In other words... if people learn by making mistakes, by now I should know just about everything!!!
87 R10 Silverado Fleetside 355 MPFI 700R4 3.42 Locker (aka Rusty, aka Mater)