14 bolt disk brakes

[dheavychevy38]

so i have everything in the 60 and the 14 bolt disk conversion in a 89 k5 i vaccum bleed the brakes then to make sure i did it the old fashion way and now no rear brakes?
i thought in some situations you could run the stock master and porportioning valve /forums/images/graemlins/confused.gif

i think the valve shifted on me and cut off the rear brakes /forums/images/graemlins/thinking.gif

 

[jwduke]

Your proportioning valve has a bypass in it, that has bypassed because of loss of fluid to your rear brakes. If you look at a your proportioning valve, you will see a "plunger", push this plunger back in. (It will be hard to do.) Then power bleed your brakes. Good luck.

 

[dheavychevy38]

thanks but i have order a adjustable one from summit and replumbed the lines /forums/images/graemlins/thumb.gif

 

[jwduke]

I replaced mine with a proportioning valve from a '80 Vette. It is a disc/disc proportioning valve. Cost about the same & no replumbing hassles.

 

[dheavychevy38]

maybe i will look in to that cause i really don't like haveing all rigged i know it's right but don't like how it looks /forums/images/graemlins/thumb.gif

 

[Muddytazz]

I'm still running my stock prop valve in my burb. Only thing I had to do was take her in to have it pressure bled and its been working flawlessly every since.

3/4ton m/c and booster
stock 1/2ton prop valve
stock lines
caddy calipers in the rear

 

[dheavychevy38]

whatdo you mean by power bleed ?

 

[Muddytazz]

The tire shop puts a pressurized cap on your m/c and pressurizes your brake system and forces all the air out under compressed air.

 

[hawkeye649]

Dunno 'bout burbs, but I think K5's have problems with rear wheel lock up. I guess your millage may vary, depending on wheel size? More rolling force...

 

[Muddytazz]

I don't think its so much a wheelbase issue as its more of a vehicle weight issue no matter what the vehicle.

 

[surpip]

my rears dont lock up at all /forums/images/graemlins/dunno.gif

 

[dheavychevy38]

all right many things to try i think i will just get a valve for a 4 wheel disk try that if i'm not happy than i will try after market

if the rears lock up thats good that way you can stilll stear /forums/images/graemlins/screwy.gif /forums/images/graemlins/yikes.gif

oh yeah 38.5 meats is what i am running /forums/images/graemlins/peace.gif

 

[hawkeye649]

[ QUOTE ]
I don't think its so much a wheelbase issue as its more of a vehicle weight issue no matter what the vehicle.

[/ QUOTE ]

Funny, don't remember mentioning wheel base? I was thinking weight, and rolling force (per say, 38's probably wont lock up on tar, but 31's would.) /forums/images/graemlins/thinking.gif

 

[dheavychevy38]

89 k5 yeah i can see what you mean lock the meats up at the stop light always gets those over priced cars out of the way /forums/images/graemlins/histerical.gif /forums/images/graemlins/histerical.gif

 

[gravdigr]

[ QUOTE ]
if the rears lock up thats good that way you can stilll stear

[/ QUOTE ]

I really hope you were kidding...I think you were.

For anyone that doesn't know locking the rear tires is very bad, especially on main roads. If you lock the rear tires and not the front the rear of the vehicle will swing around on you throwing you totally out of control. That's why vehicles have proportioning valves to put more brake pressure on the front brakes. For 1 the front wheels need to do more of the stopping power than the rear due to weight transfer when stopping. And 2 if you lock the front wheels you do lose steering but your vehicle stays straight nose pointing forward lessening the chance of rolling the vehicle.

This safety announcement brought to you by gravdigr, you don't want to be seeing me soon /forums/images/graemlins/wink.gif

 

[hawkeye649]

Amen /forums/images/graemlins/bow.gif
Don't want no nun gat no tires dun locking up no way no how. /forums/images/graemlins/shame.gif /forums/images/graemlins/waytogo.gif

 

[RootBreaker]

[ QUOTE ]
I replaced mine with a proportioning valve from a '80 Vette. It is a disc/disc proportioning valve. Cost about the same & no replumbing hassles.

[/ QUOTE ]

I know I need a new prop valve.. so maybe I should try this one.... all lines mated right up? same shape as the pickup ones?

 

[gravdigr]

[ QUOTE ]
Amen /forums/images/graemlins/bow.gif
Don't want no nun gat no tires dun locking up no way no how. /forums/images/graemlins/shame.gif /forums/images/graemlins/waytogo.gif

[/ QUOTE ]

If I understood that what does it make me?

hick
hillbilly
redneck or jus a good translator /forums/images/graemlins/tongue.gif

 

[hawkeye649]

Cracker... read the sig!

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[jwduke]

It is a exact match. I think I can find the part # if you want it.