disk brakes on 14 bff

[m-4x4-chevy]

Blazer 1. Shed 0.

On the caliper piston size and force topic: The line pressure (lbs / sq inch) x the surface area (sq inches) = piston force (lbs). So a bigger caliper piston creates more force. On the master cylinder it's just the oposite. Force divided by the surface area = line pressure.

Physics applied to wheeling

For the readers that have not gone through this yet. The smaller 76-78 caddy eldo piston creates less force, which is good. Often times the rear line pressure must be reduced with an adjustable proportioning valve such as the Wilwood part no. 260-8419. www.wilwood.com This is inserted into the rear brake line and is manually adjusted.

 

[dremu]

Blazer 1. Shed 0.

I wonder if that's my most famous moment. At least I survived it with only a few scratches and a bruised ego... and I tell you, I block-and-chock EVERY TIME now.

On the caliper piston size and force topic: The line pressure (lbs / sq inch) x the surface area (sq inches) = piston force (lbs). So a bigger caliper piston creates more force. On the master cylinder it's just the oposite. Force divided by the surface area = line pressure.

Physics applied to wheeling

For the readers that have not gone through this yet. The smaller 76-78 caddy eldo piston creates less force, which is good. Often times the rear line pressure must be reduced with an adjustable proportioning valve such as the Wilwood part no. 260-8419. www.wilwood.com This is inserted into the rear brake line and is manually adjusted.

See, I *knew* my hydraulics were rusty =)) It was the master end I was thinking of.

Anyway, this may 'splain why some folks have had issues with prop valves and master cylinders after the rear disc conversion, depending on which calipers were used.

Would you happen to know if the 1/2 ton fronts are the same piston diameter as the Caddies', or if they're more like the 3/4 ton fronts?

-- A