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Author Topic:   best stock master cylinder? brake trouble
chevy_20
Dirt Full Roller

Total posts: 50
posted July 21, 2002 11:25 PM
What would be the best master cylinder (manual brakes) to run on my 77 camaro. I run 3 wheel brakes(front disc and rear drums). When i bought the car last year, the brakes worked fine. The master cylinder went bad so i replaced it with the exact same master cylinder for a 77 camaro. Now the front brake works fine but i have very little rear brake. I thought about putting one of those 10 lb. pressure valves in the line to see if that would help?

snowman
Dirt Maniac

Total posts: 140
posted July 22, 2002 12:13 AM
chevy 20, Get one for a 76 chevy pick up......2 wheel drive

Don't use the residiual valve.......these are for applications with the master cylinder mounted below the calipers......

Also, don't use the stock proportioning valve........with this combination, no proportional valve is required..........an aftermarket adjustable valve would be OK......but not required

Good Luck,

Snowman

powerglides
Dirt Full Roller

Total posts: 69
posted July 22, 2002 06:29 AM
I would still use the residual valve it keeps the shoes out against the springs! Make sure the master is for manual brakes.

awkwardjeff
Dirt Freak

Total posts: 458
posted August 02, 2002 04:52 AM
both snowman and powerglide are correct..76 chevy 2 wheel drive manual brake master. BUT for drum rear you need a residual valve. This does like powerglide stated and keeps the shoes out............see a drum brake has springs that PULL the shoes back in away from the drum.......so as you steep on the brake pedal you are applying front brake and rear brake at the same time.......but the front calipars are only needing a little fluid to apply.......at that point the pedal feels hard.....but the rear brakes aren't out against the drum yet.......that is the reason for the residual valve.

The reason for the 76 truck is bigger rear bore......as compared to the front bore...

I don't like 3 wheel brakes, I would use a 9 or 10 pound residual valve for the drums. put the valve as close to the master as you can........this helps keep the pressure so very little pedal is needed to apply the rear brakes.

snowman
Dirt Maniac

Total posts: 140
posted August 03, 2002 09:15 PM
DRATS!!!!!!! Looks like I missed a trick when I had to use drums........I hate it when that happens....lol

I have to use residual valves for some streetrods that I have been building lately.(master below the calipers,4 wheel discs). I hadn't thought of using them for a drum brake racing application. Looks like a good idea to me.
Thanks Guys,

Snowman

tilley88
Dirt Freak

Total posts: 353
posted August 04, 2002 12:38 PM
75 Vette master cylinder works good, too. That's "cor" vette, not "che" vette!lol

kong
Dirt Full Roller

Total posts: 35
posted August 07, 2002 12:04 PM
Where is a good place to get a residual valve? Can I go down to NAPA and get one or do I need to order one from a race parts dealer?

redneck racing
Dirt Freak

Total posts: 276
posted August 07, 2002 12:16 PM
Correct me if im wrong but if the residual valve is another name for the proportioning valve the only place i know where to get one would be the dealership. Eddie

snowman
Dirt Maniac

Total posts: 140
posted August 07, 2002 01:29 PM
They are two different items........a proportional valve adjusts the pressure....a residual valve holds the specified pressure in the line........

Where to buy??? Any race shop that carries wilwood products.....any on-line company....Summitt.....Perhaps some of the forum sponsors.....Kinetic Performance, CustomPerformance, Day.......

Good Luck,
Snowman

widebody
Dirt Maniac

Total posts: 197
posted August 07, 2002 04:23 PM
Make sure you get the one for Drum brakes. They do sell a 2# valve for use on disk brakes, its colored blue so read the package.

This is the one you want!!
WIL-260-1876
"10 lb., billet aluminum, anodized red, residual pressure valve"
$16.50 from summitracing.com online.

Dont forget to pickup (2) 1/8 pipe to 1/4 brake line (you should be using 1/4 for drums) adapters from the local quickie parts.. about $1.00 each
Get ordering its already wednesday!!!!!!

I also picked up some speed bleeders this past winter. It makes it a one man job!! Just crack the bleeder, push a piece of hose on the end and stick the hose in a can. pump utill its all fluid, tighten bleeder.


chevy_20
Dirt Full Roller

Total posts: 50
posted August 07, 2002 09:08 PM
I installed the residual valve and it cured my brake problem. Thanks for the help.

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