Front caliper piston area: How big?
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From: I tend to be leery of any guy who doesn't own a chainsaw or a handgun.
Front caliper piston area: How big?
Looking for the piston size or total piston area (per caliper) for the front brakes used with the 13" rotors.
thanks,
Mike
thanks,
Mike
Thread Starter
Tech Contributor
Joined: Jun 2004
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From: I tend to be leery of any guy who doesn't own a chainsaw or a handgun.
Instructor
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From: des plaines, il
Don't forget the PBR-type sliding calipers use BOTH ends of the piston bore to apply grip. Thus the effective piston area - in terms of hydraulic pressure - is double the face area calculated above. HTH
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From: des plaines, il
There's nothing to be an expert about.
Look at the caliper - each pad is reacting one end of the piston bores, and is constrained by the rotor surface. Thus the clamping force is fluid pressure times double the two pistons' face area. To say it another way, both ends of the piston bores are free to move, so they become double-ended hydraulic cylinders. The total force is the same as if it were a 4-piston fixed caliper.
Look at the caliper - each pad is reacting one end of the piston bores, and is constrained by the rotor surface. Thus the clamping force is fluid pressure times double the two pistons' face area. To say it another way, both ends of the piston bores are free to move, so they become double-ended hydraulic cylinders. The total force is the same as if it were a 4-piston fixed caliper.
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Thread Starter
Tech Contributor
Joined: Jun 2004
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From: I tend to be leery of any guy who doesn't own a chainsaw or a handgun.
My appreciation,
Mike
Thread Starter
Tech Contributor
Joined: Jun 2004
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From: I tend to be leery of any guy who doesn't own a chainsaw or a handgun.
I'm working on a hybrid suspension combination. I'm putting a C4 F&R suspension on my spare C3 frame, but continuing to use the stock 15" aluminum wheels (I like the looks of my '69, just not the suspension geometry). I have a set of Wilwood four piston fixed calipers on the back, and am trying to find a rotor/caliper combo in the front that will work well, and still fit under the 15" wheels. The rear was fairly easy, although labor intensive, but the fronts are giving me headaches. There's just not as much room in the front wheel area due to the steering arm (tie rod area) placement. I've got most everything in this conversion either welded in, or calculated for fit. The front brakes are the only holdup at the moment.
