Manual Brake Options/Discussion

MikeRenz

not stock
Well i've eliminated my power steering so hydraboost isn't and option...and i despise the stock brake booster, so i'm going to convert to manual brakes. In looking at GM master cylinders i've found a couple that are seemingly what are needed.

This cute lil guy:
b7_1.JPG

supposedly from/for a 63/64 corvette


This slightly fatter one:
17_1.JPG

65/66 corvette


This larger style:
342d_1.JPG

for 67-76 corvettes

This decent looking one:
M-82035.jpg

from 70s chevettes

and my personal favorite:
edd2_1.JPG

from 59/60 chevy's. Although the mount point rubber nipple on this seems inhibitive of it bolting up to our trucks. I just like the fact that it doesn't have some huge reservoir to look at and would take up very little room on the firewall.


So my questions are these:
Who has used what for manual brakes on their trucks?
For the cylinders with only 1 outlet port, are you using the stock proportioning valve?
For cylinders with 2 outlet ports, is there no need for a prop valve?

Any pics you have of your manual brake setup are more than welcomed! Thanks.
 

MikeRenz

not stock
Re: Manual Brake Options/Discussion

Why did you get rid of powersteering?

haven't you seen me? I'm really really strong. I put the power in manual steering. :lol:

I'm cleaning up the look...less pulleys/belt length/random crap bolted the the motor...the better.
 

sytyguy

Moderated User
Re: Manual Brake Options/Discussion

We use a Wilwood 260-4893 master cylinder (pic) on our Lotus race car and use a single line Wilwood 260-8419 proportioning valve (pic) on the rear line only. Testing to get the prop valve set right usually consists of 60-0 hard braking and turn knob until rear just barely wants to lock under the most intense braking.

pic.jpg
+
knobvalve-SML.jpg
= :D
 

MikeRenz

not stock
Re: Manual Brake Options/Discussion

dont need power steering on a truck that never leaves a garage
coming from the one person who's truck is in more pieces than mine. :lol:


so anywho...back on topic. So dual reservoirs is the safer option. I'll still have my foot brake for those all too common brake line ruptures, so I might stick with a single reservoir...all depends on what i come across though.


What about non-gm options? I know Silly shared a summit catalog cylinder with me in chat a few weeks ago...just wondering who knows of what else thats out there.
 

MikeRenz

not stock
Re: Manual Brake Options/Discussion

We use a Wilwood 260-4893 master cylinder
pic.jpg

on our Lotus race car and use a single line Wilwood 260-8419 proportioning valve
knobvalve-SML.jpg

on the rear line only. Testing to get the prop valve set right usually consists of 60-0 hard braking and turn knob until rear just barely wants to lock under the most intense braking.

i like the looks of that. Hood, do you stock/have pricing on those...or shall I just search online?
 

warmpancakes

New member
Re: Manual Brake Options/Discussion

wilwood makes a sweet billet cylinder, or a master from a 1982 s10 with manual brakes will bolt in
 

warmpancakes

New member
Re: Manual Brake Options/Discussion

yep I have one somewhere just have to play with rod lenth (man im gonna regret typing that }
 

SY2455

70's Veteran
Re: Manual Brake Options/Discussion

Mike, I have done a few of these on the older muscle when converting from a single reservoirs to the dual set up. The one that work the best for us was the dual reservoirs unit from the 1979 Pontiac T/A with the 4 wheel disc brake. It had a large cylinder bore and require very little effort or travel in the brake pedal to stop like right now. People use to say that no-way was the car manual brake because it would stop so well, until you open the hood and show them. I will say that you have to be aware of the master cylinder bore size when you look at doing this because if your master cylinder bore size is too small, then you will end up with one scary ride.
 

MikeRenz

not stock
Re: Manual Brake Options/Discussion

yea it seems that 1.0625" (1 1/16") is a common bore for the manual master cylinders. The billet wilwood that Ken's talking about is only 1". I'd imagine that 1/16" makes a big difference. I'm searching for the TA cylinder i only found vacumm assisted ones:

engfront.jpg


does that look like what you used? If so, i'm more leaning towards the Wilwood.
 

SY2932

Administrator
Re: Manual Brake Options/Discussion

I'm using a manual brake master cylinder for an S10 in my truck. I would like to graduate to a Wilwood at some point in the future. My bud went to manual brakes in his truck many years ago (same setup as mine). I LOVED how much room it opened up under the hood. However, I HATED trying to stop the truck. When I drove it, I had to stand on the pedal hard and even then I wasn't sure if I would be able to stop or not...

The key was moving the pivot point on the pedal arm further up where it is on a truck with manual brakes. BIG difference in the pedal response. I machined the parts that I needed and got everything welded up for a clean install. All you need is a 1/2 X 13 grade eight bolt and a shaved down nut to make a new pivot point for the rod arm.
 

Six-is-Enough

Use to do a little Boost
Re: Manual Brake Options/Discussion

We use a Wilwood 260-4893 master cylinder (pic) on our Lotus race car and use a single line Wilwood 260-8419 proportioning valve (pic) on the rear line only. Testing to get the prop valve set right usually consists of 60-0 hard braking and turn knob until rear just barely wants to lock under the most intense braking.

pic.jpg
+
knobvalve-SML.jpg
= :D

Those wilwood mastercylinders come from chrysler. I believe it is off a dodge caravan.:2cents:
 

SY2455

70's Veteran
Re: Manual Brake Options/Discussion

yea it seems that 1.0625" (1 1/16") is a common bore for the manual master cylinders. The billet wilwood that Ken's talking about is only 1". I'd imagine that 1/16" makes a big difference. I'm searching for the TA cylinder i only found vacumm assisted ones:

engfront.jpg


does that look like what you used? If so, i'm more leaning towards the Wilwood.

The one we use had a 1 1/8 " or a 1 5/16" bore. For the 1 5/16" bore we just used a master cylinder for a 1979 1 ton truck. If all you can locate is a powerbrake unit then you will need to get a new pushrod made to connect to the brake pedal :tup:.
 

Robert Lone

MUTANT
Re: Manual Brake Options/Discussion

Hey Mike,

For shits and giggles, try the stock master cylinder bolted directly to the firewall. I'm rebuilding the brakes on my Mom's 1968 Charger and it takes the same master cylinder regardless of power or non-power brakes.

It may be a simple (free) solution...

Just a thought...
 

MikeRenz

not stock
Re: Manual Brake Options/Discussion

i'd consider it...but does anyone know the stock master cylinder bore?

Personally i've always thought our reservoir was an eyesore.
 
Top