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Old 05-19-2004, 05:25 PM
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Two questions on brakes...

Hi everyone.

I've got a 57 chevy pickup. Recently purchased a disc/drum power brake booster setup and a disc brake conversion kit for up front.

First question is--
The instructions for the disc brake conversion says that 70-78 Camaro rotors and calipers are used for the conversion.

This strikes me as a little odd...although I don't know a whole heck alot about Camaros, I would have thought the brakes would be the same across a particular generation.

With that said...are there any other vehicles that use the same front brakes as the 70-78 Camaros? Any thoughts on Wilwood's offering?

Ok SECOND QUESTION.

I have drums in back. I'm changing from a single chamber master cylinder to the dual...how should I run the line?

-dedicate a chamber to the front and the other to the back?
-split each chamber:
-front left/right rear
-front right/left rear

thanks for any and all insight

yeah here's the odd thing...

On the Wilwood site, if you choose Chevy Camaro, it says 70-92 for the years...odd?

nevermind about the 70-78 deal, I was eating retard sandwiches.

how to run the line? or do I even have an option since I went with a disc/drum power brake booster setup? am I locked into going front/rear?

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Last edited by unstable; 05-19-2004 at 05:22 PM.
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Old 05-19-2004, 09:59 PM
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Quote:
I have drums in back. I'm changing from a single chamber master cylinder to the dual...how should I run the line?

since you are going with front disc/rear drum set up, you can go with a front/rear split set up for simplicity.(one chamber for each) this is how the camaro would be set up anyway. a question, though... does the kit come with a propotioning valve, or do you have to supply one? those new front discs are going to grab 'way harder than the old drums. you will also need a combination valve to make the disc/drum combo operate properly. you will also need (maybe) a new m/c push rod to work with the new dual piston m/c.


if you want to go to a rh front/lh rear ect. split, you will need a m/c that is set up for it. depending on the design, it may have four outlet ports, two of which will have proportioning valve built into them. in my opinion, the conventional front/rear split is far and away the simplest!! good luck!
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Old 05-19-2004, 11:24 PM
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'75-78 Novas (& clones) use the same rotors, as well as '70-78 Firebirds & '73-'77 Malibus. Chevy enlarged the outer wheel bearings for '79, so that could be the difference.
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Old 05-20-2004, 05:35 AM
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Check out this link and follow the instructions for the type system you intend to install. Which would be a firewall mounted master cylinder disk/drum setup. There are a couple ways to do this and the link will explain what you need.

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Old 05-20-2004, 10:29 AM
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Cool, thanks gentlemen.

SBChevFreak--

No I don't think I have any of the proportioning valves or any of that crap. I just got back from Texas and the boxes were waiting at home for me. I popped the boxes open and I've got:

-2 metal plates that bolt to the axle to mount the calipers I'm assuming...along with a plethora of bolts and some bearings...and some instructions.

-Box 2 has the master cylinder/brake booster in it.

I have to supply all the other fun stuff. lines, valves, brains...well that's why I come here for the brains part, rotors, calipers, wheels.

also--

Master cylinder is under the floor...not on firewall.
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Old 05-20-2004, 09:23 PM
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my bad...!lol should have remembered the location of the master in those trucks!


i've never done a power brake conversion to an under floor setup before. you may have to relocate the master to make room for the booster, but i don't know for sure. anyone ever done this?
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Old 05-23-2004, 09:04 AM
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actually I have the instructions for it, so all should be cool.
Everything bolts up to the original location, only thing I have to do is relocate the emergency brake pulley.

Only thing I'm wondering about really at this point is the proportioning valves and all that other crap...and maybe what sized lines I should use....I know there is a crapload of different sized lines available, what to do?

and what to do about proportioning too? I did read that site that was posted about the different setups, but I don't think it went into details on what proportioning and residual valves to use.

if there's one thign you don't want to screw up on, it's brakes.
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Old 05-23-2004, 09:36 AM
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if doing on budget grab the metering valve from the front line connecting the two front cylinders together and the proportioning valve from donor car and order a 2lb residual valve for the rear drum and 10lb residual for the front disc, or order an adjustable proportioning valve as well, either case will work well. Rick
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Old 05-23-2004, 03:58 PM
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Smile

3 1/6 lines. 2lb residual valve for discs, 10 lb valve for drums, installed as close to the m/c as possible. Put an adjustable proportioning valve in the line to the rear brakes where you can reach it easily. Use the m/c port closest to the booster for the rear brakes. Step up and buy all three valves from Willwood,trust me.
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