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Old 03-16-2001, 01:03 AM   #1
Arnie
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Post Why are brake calipers mounted differently on different cars?

I was looking at brake calipers on different cars today and some are on the front of the disk (on the front wheel), some on the back (on the rear wheel) and some vice versa. Are there advantages to either of these placements of the caliper in relation to the rotor? What's up? 'scuse me if this borders on a Newbie topic.
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Old 03-16-2001, 02:24 PM   #2
LUME
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packaging. thats it. Many will tell you that it aids in traction if you mount them a certain way, but I did a ton of free body diagrams trying to prove/disprove that, and all I came up with was "disprove". Anybody have any input?
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Old 03-16-2001, 02:59 PM   #3
deepbeep
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I've also heard that it matters squat... Engineer's prerogative whether it's leading or trailing.
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Old 03-16-2001, 03:21 PM   #4
munkis
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im pretty sure its where ever the engineers decide to put them.

On the rear of late model town cars/grand marquis, the right rear is on the front of the disc and left rear is on the rear of the disc. Ponder that! hehe

Jay McDade
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Old 03-16-2001, 06:37 PM   #5
adhowe70
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McDade,

Good call. I'm an engineer. My office can have two different designers working on the same problem. When this happens, we usually get two totally different answers that solve the problem equally well. One's not really better than the other, just different. That's what you see with the calipers.
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Old 03-17-2001, 05:37 AM   #6
Pilot
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Cooling is more dependent on ducting (unless you have an open wheel car, in which case leading is better for the caliper and the fluid)

See various Porsche models for an illustration of this. Some in front, some in back, all depends on where the cooling ducts send the air.
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Old 03-17-2001, 11:53 AM   #7
Arnie
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Hm, that's dissapointing that there isn't some kinda incredible mystical engineering answer to this question. Perhaps it has something to do with available space and mounting poistions and rotational forces that could shear the calipers off? Ack, just pondering out my butt on that one...
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