Brake Pedal Ratio for a 1967 with factory brake pedal?

[bguild]

Okay i need to know the Brake Pedal Ratio for a 1967 chevy truck. Mine is torn apart and I need to know the Brake Pedal Ratio in order to figure out what Master Cylinder to run with my Z06 brake calipers.

Thanks in advance.

[geezer#99]

Should be 6 to 1. Measure it! Full length divided by distance from top to pushrod hole.

[bguild]

My brake pedal is not in the cab or I would (-;
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[Keith Seymore]

Originally Posted by geezer#99

Measure it! Full length divided by distance from top to pushrod hole.

This is true.

Originally Posted by bguild

My brake pedal is not in the cab or I would (-;
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This is too bad! (lol).

It probably depends too on if your truck was originally power or manual brakes.

I don't have anything for '67, but I do have the brake system release charts for '74 and for '87. Scan through there to get a feel for the numbers.

http://67-72chevytrucks.com/vboard/s...d.php?t=510519

Looks like most of them are around either 4.5:1 or 6:1.

K

[bguild]

Thanks for the help!!
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[geezer#99]

Originally Posted by bguild

My brake pedal is not in the cab or I would (-;
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Even easier with it out. Same way to measure it.
While you're at it drill another hole 1 1/2 inches below the other pushrod hole. It's needed for power brakes because the ratio needs to change to 4.5 to 1.

[bguild]

Originally Posted by geezer#99

Even easier with it out. Same way to measure it.
While you're at it drill another hole 1 1/2 inches below the other pushrod hole. It's needed for power brakes because the ratio needs to change to 4.5 to 1.

Okay I will look at it later then. I am running manual brakes. I think with Z06 6 piston calipers and correct master I shouldn't need a booster.
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