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Author Topic: Brakes (again)  (Read 14028 times)

Offline Bitzer!

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Brakes (again)
« on: February 15, 2012, 04:10:34 pm »
Ok guys, here I go again!
Slightly undecided which servo/booster/M-cylinder I need.
If you've read previous, I had a new one sent over, thought I had the right one and binned the complete old unit. New one is wrong and I have nothing to reference to.

Does the pipe in the picture dictate more acurateley which type of system I have? It's going onto the C30 454.

As always, many thanks!

Andy
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1979 GMC CrewCab  C20 1t
454 750 Holley,TH350, 14bolt diff fully floating
Why aren't there 8 days in a week!
A K5 rolling shell *new addition*

Offline zieg85

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Re: Brakes (again)
« Reply #1 on: February 15, 2012, 05:04:34 pm »
The C30's I know all had hydroboost assist.  What you have pictured is the vacuum line to a vacuum power brake set up, like from a C20
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Carl 
1985 C20 Scottsdale 7.4L 4 speed 3.21
1986 C10 under construction
https://www.facebook.com/groups/248658382003506/

Offline Bitzer!

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Re: Brakes (again)
« Reply #2 on: February 15, 2012, 05:19:34 pm »
Cheers Zieg, that was the only pipe that came out of it (vacuum). If it was a hyrdoboost, would it have additional pipes?
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1979 GMC CrewCab  C20 1t
454 750 Holley,TH350, 14bolt diff fully floating
Why aren't there 8 days in a week!
A K5 rolling shell *new addition*

Offline zieg85

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Re: Brakes (again)
« Reply #3 on: February 15, 2012, 05:30:32 pm »
Quote from: Bitzer! on February 15, 2012, 05:19:34 pm
Cheers Zieg, that was the only pipe that came out of it (vacuum). If it was a hyrdoboost, would it have additional pipes?

Hydroboost looks totally different and runs off the power steering pump as opposed to vacuum from the engine.
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Carl 
1985 C20 Scottsdale 7.4L 4 speed 3.21
1986 C10 under construction
https://www.facebook.com/groups/248658382003506/

Offline Bitzer!

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Re: Brakes (again)
« Reply #4 on: February 15, 2012, 05:38:44 pm »
You are a legend!
That last reply has put my mind at rest. I'll get a C20 one and job done.
Now you can see why it's a Bitzer haha

I owe you a beer mate
Thanks again
Andy
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1979 GMC CrewCab  C20 1t
454 750 Holley,TH350, 14bolt diff fully floating
Why aren't there 8 days in a week!
A K5 rolling shell *new addition*

Offline zieg85

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Re: Brakes (again)
« Reply #5 on: February 15, 2012, 05:40:40 pm »
Quote from: Bitzer! on February 15, 2012, 05:38:44 pm
You are a legend!
That last reply has put my mind at rest. I'll get a C20 one and job done.
Now you can see why it's a Bitzer haha

I owe you a beer mate
Thanks again
Andy
Do you have the booster that the white plastic piece goes into?
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Carl 
1985 C20 Scottsdale 7.4L 4 speed 3.21
1986 C10 under construction
https://www.facebook.com/groups/248658382003506/

Offline Bitzer!

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Re: Brakes (again)
« Reply #6 on: February 15, 2012, 05:43:41 pm »
No mate
Foolishly I unbolted the lot and when the new one turned up I binned the lot!
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1979 GMC CrewCab  C20 1t
454 750 Holley,TH350, 14bolt diff fully floating
Why aren't there 8 days in a week!
A K5 rolling shell *new addition*

Offline zieg85

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Re: Brakes (again)
« Reply #7 on: February 15, 2012, 06:13:08 pm »
Ok, you need everything that bolts to the firewall...  I wish you were closer, I have one complete sitting on a shelf and I can't remember if the power booster has the bracket bolted or a part of it.  If you have to start from scratch a set up with the highest GVW rating with vacuum assist booster.  My C20 is the 8600 GVW which may be the heaviest duty 3/4 ton in 1985.   Both my 1985 C20 and C30 are listed as the same 8001-9000 GVW but one is the vacuum boost and the other hydraboost...
« Last Edit: February 15, 2012, 06:18:03 pm by zieg85 »
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Carl 
1985 C20 Scottsdale 7.4L 4 speed 3.21
1986 C10 under construction
https://www.facebook.com/groups/248658382003506/

Offline Bitzer!

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Re: Brakes (again)
« Reply #8 on: February 16, 2012, 10:07:03 am »
I wished I lived closer too. I must have paid over $2000 in shipping and a further $1500 in import tax. And the cost of the parts makes it pretty expensive hobby!

Think I've seen a recon unit for $120 so that'll do. I'll try and sell the one I've got here in the UK. If I sent it back I'd still have to pay the shipping so effectivly I'd be out of pocker further. Live and learn!

Cheers again for ya help
Andy
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1979 GMC CrewCab  C20 1t
454 750 Holley,TH350, 14bolt diff fully floating
Why aren't there 8 days in a week!
A K5 rolling shell *new addition*

Offline Bitzer!

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Re: Brakes (again)
« Reply #9 on: February 16, 2012, 03:52:48 pm »

Nothings easy is it!

Would you know if the bore is 1" or 1.125" ?

Struggling now to find a combo kit that can be shipped today. Tried Summit & Cardone. Anyone else you know?

** Sorry Chris if this offends **

Andy
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1979 GMC CrewCab  C20 1t
454 750 Holley,TH350, 14bolt diff fully floating
Why aren't there 8 days in a week!
A K5 rolling shell *new addition*

Offline zieg85

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Re: Brakes (again)
« Reply #10 on: February 16, 2012, 04:52:16 pm »
honestly don't know but the answer has to do with what brake booster/brake system is in the truck.  The fact you are replacing both the master and booster I would think as long as the 2 mate up you are good to go.  Bigger is always better if the booster can be matched to it.  My $.02
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Carl 
1985 C20 Scottsdale 7.4L 4 speed 3.21
1986 C10 under construction
https://www.facebook.com/groups/248658382003506/

Offline jaredts

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Re: Brakes (again)
« Reply #11 on: February 16, 2012, 05:37:37 pm »
Do you have the rod?  I would think it would be different between the two bores.
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Offline Bitzer!

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Re: Brakes (again)
« Reply #12 on: February 17, 2012, 03:12:16 am »
No, I don't have the rod. I disconnected it from the brake pedal, unbolted from the firewall, took the brake pipes out and binned the lot!!

Foolish Englishman!!
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1979 GMC CrewCab  C20 1t
454 750 Holley,TH350, 14bolt diff fully floating
Why aren't there 8 days in a week!
A K5 rolling shell *new addition*

Offline Bitzer!

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Re: Brakes (again)
« Reply #13 on: February 19, 2012, 03:16:10 pm »
Please guys, getting desperate now!

Does it matter which bore I get if I get a booster/master cylinder kit complete?

Will they both marry up to the pedel and the existing brake pipes?

Almost at the stage of thinking Flintstone to stop  :-\
« Last Edit: February 19, 2012, 04:17:31 pm by Bitzer! »
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1979 GMC CrewCab  C20 1t
454 750 Holley,TH350, 14bolt diff fully floating
Why aren't there 8 days in a week!
A K5 rolling shell *new addition*

Offline 87454westernhauler

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Re: Brakes (again)
« Reply #14 on: February 19, 2012, 04:07:50 pm »
I would think that there wouldnt be any difference. any size bore should work.
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86 c10 350 sbc 700R4 Daily Driver
79 gmc c20 350 th350
78 k1500 4x4 350 th350
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