brake question

[smashingchuck]

anyone know the bore size for front calipers and rear wheel cylinder on a 12 bolt?

[89 crew]

The calipers are pretty much standard but I don't remember the size. The wheel cylinders are different depending on the size of the shoes and there are several as I recall.

[smashingchuck]

still have to know, need to spec out a new master cylinder.... none of these truck came with out power brakes did they?

[Captkaos]

Yes you could get manual brakes on any of the base models. Power was an option.

[Mickey_D]

Manual brakes on disks? Man, that's be hell on wheels trying to get that pulled to a stop....

[OJOE]

Originally Posted by Mickey_D

Manual brakes on disks? Man, that's be hell on wheels trying to get that pulled to a stop....

i have a 85 c10 in my junk trucks with manual disk. i guess just stand up on the brake. on same truck, no p/s or a/c with a 3 on the tree

[smashingchuck]

Originally Posted by Mickey_D

Manual brakes on disks? Man, that's be hell on wheels trying to get that pulled to a stop....

yeah... but the power booster doesn't exactly fit very well under the dash

[Captkaos]

I ran manual brakes on my 73 for years and it had a built 454, 4 speed and a loose nut behind the steering wheel. Never was a problem stopping it. I did convert to power steering though as turning it was murder...

[OJOE]

Originally Posted by smashingchuck

yeah... but the power booster doesn't exactly fit very well under the dash

i have a brake booster turned cross ways under the very small dash of my model "A" hot rod, works real good with the 4 wheel disk brakes.

[smashingchuck]

Originally Posted by Captkaos

I ran manual brakes on my 73 for years and it had a built 454, 4 speed and a loose nut behind the steering wheel. Never was a problem stopping it. I did convert to power steering though as turning it was murder...

so.... maybe I should just get a master cylinder for one with manual brakes....
are they different or do they have the same 1-1/8" bore?

technically the power booster would fit, I'm just having a hard time getting the linkage to work.

[Captkaos]

Originally Posted by smashingchuck

so.... maybe I should just get a master cylinder for one with manual brakes....
are they different or do they have the same 1-1/8" bore?

technically the power booster would fit, I'm just having a hard time getting the linkage to work.

Don't quote me on this, but I think the manual is slightly larger... I honestly don't remember and the truck is about 40 miles away.
On the linkage, make a Z-bar mounted vertically. Then the when the pedal pushes the bar it will pivot and the other tab will apply the brakes. Just make sure it is the same amount of travel...

They make a kit for this ya know, but I am guess you are making your own...

Found the manufacturers:
http://ecihotrodbrakes.com/hanging_p...ssemblies.html
http://www.kugelkomponents.com/produ...akesystem.html

If anything, you can use it for examples...

[smashingchuck]

I'm making my own, it's pretty much done. the kits really wont work I'm building it on to the the bracket that holds the brake and clutch pedal.

[smashingchuck]

Originally Posted by Captkaos

Don't quote me on this, but I think the manual is slightly larger... I honestly don't remember and the truck is about 40 miles away.
On the linkage, make a Z-bar mounted vertically. Then the when the pedal pushes the bar it will pivot and the other tab will apply the brakes. Just make sure it is the same amount of travel...

They make a kit for this ya know, but I am guess you are making your own...

Found the manufacturers:
http://ecihotrodbrakes.com/hanging_p...ssemblies.html
http://www.kugelkomponents.com/produ...akesystem.html

If anything, you can use it for examples...

hey chris, I got a manual brake master cylinder like you had (an 85). It actually has a stepped bore in it. 1" for the front and about 1-7/16" for the rear. My question has know turned to:

Proportioning valves

are they all the same? It seems like with the stepped cylinders in the master cylinder you wouldn't even need one... but I'm not sure. Any insight? Did your parts truck even have one?


*edit*
while I'm asking you questions... one thing about those windows we've been discussing for a year now. To make the templates, I would need to have all the stuff that comes with the kit except the windows, to make sure if fit the opening correctly. Do you think it would be possible to get the kit minus the glass so I can make the template?

[Captkaos]

Prop valves should be the same for the JB1 brakes, boosted or not from all I can tell...

I can't get you the kit minus the glass.... as for the template, he would just need the pattern for the window opening, the rest of the door would be the same (unless you channelled the truck)