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Old 05-30-2017, 06:45 AM   #1
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dual calipers vs big brake calipers

I just had a thought after watching a few yt vids on drifting. Would dual calipers on each wheel be a cheaper way to upgrade your brakes compared to going with a big brake kit?

I know the drifters put the second brakes on a hydrailic lever but if you connected the second set of brakes to tbe main brake as well with a splitter youf have trice the stopping power yes?
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Old 05-30-2017, 07:09 AM   #2
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Yes, as you wrote, dual calipers usually are not used to increase braking, but to replace drum handbrake with hydraulic one to change it to be better cooled/better wearing then stock handbrake, that is not designed for frequent use. Don't use handbrake on track very often - don't need such.
Even if one may fit dual calipers via some gimmickry brakeline/fittings parallel connection scheme for both to be used for main braking, it makes no sense to do so. Most probably front-rear brake bias will get seriously out of whack, compromising braking efficiency and working together with electronic nannies. You also won't gain what BBK provides - higher heat capacity. After all, rotors & heat capacity will stay same. So spending money / time / work to make something as important as brakes - worse.
Just get better pads & brake fluid to increase stock brake capability with throwing in airducts to get most out of stockers if one must use them.
Get BBK, if you need more heat capacity (and sometimes cheaper wearables, as in case of Essex APR Sprint & Endurance kits) and lighter weight, if your track sessions are longer then 10-15min, and/or if you are supercharged, thus higher speeds/more braking.
Forget about dual caliper usage as some surrogate BBK alternative. Result will be worse then even retrofiting of brake calipers from other cars, which i also advise against.
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Forget about "tripple braking power". If your current brakes are capable of locking wheels/engaging ABS, then their "braking power" is sufficient. "Tripple braking power" won't stop your car in three times shorter distance, what it will do - lock your wheels/engage abs at one third brake pedal travel. Will make only harder to fine-articulate braking. IF you mount on VERY sticky/grippy tires and/or add lot of air-downforce, for brakes to not be capable to lock wheels, only then increasing power of how much brakes maximum friction can provide, will do something. And in most occasions it's simpler/cheaper to just install more track oriented brake pads with higher Mu. If both compared brake kits able to lock wheel, only thing that will change actual braking distance - stickier tires/more downforce. Will change for both kits at that, as far as they both capable to completely lock.
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Old 05-30-2017, 09:47 AM   #3
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Like ^^ said, if you can engage ABS you already have plenty of braking power. What a BBK adds is thermal capacity (more metal in the rotors, more meat on the pads), which lets you run longer without overheating.
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Old 05-30-2017, 02:26 PM   #4
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I suggest you look up YouTube videos of how brakes work, it will also answer your question of why this does not work.
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Old 05-30-2017, 04:07 PM   #5
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AMG tried it on the big S class sedans about 10 years ago, but it didn't stick around for long. Not too surprising, tbh.


https://rennlist.com/forums/attachme...s-dscn1222.jpg

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Old 05-30-2017, 04:22 PM   #6
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More is better though.
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Old 05-30-2017, 04:49 PM   #7
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I guess looking at that pic, pros of such design: more pad area, longer lasting pads
Cons: more parts in any assembly, more for something to fail. More expensive to make. Also lesser cooling/open to air area for disks.

And i see no reasons, in what way multipads might be better vs more common upping count of brake pots in one caliper. Or by what two small pads of same summary area better to one big. Of course, as there is no native brake kit of multiple pads for ours, that's just theoretical speculation on subject.

Offtopic. Placing valve in middle of two close spaced wheel spokes, as in pic, imho looks potentially like major PITA to unscrew/screw cap on it usability-wise.
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Old 05-30-2017, 04:51 PM   #8
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Quote:
Originally Posted by churchx View Post
I guess looking at that pic, pros of such design: more pad area, longer lasting pads
Cons: more parts in any assembly, more for something to fail. More expensive to make. Also lesser cooling/open to air area for disks.

And i see no reasons, in what way multipads might be better vs more common upping count of brake pots in one caliper. Or by what two small pads of same summary area better to one big. Of course, as there is no native brake kit of multiple pads for ours, that's just theoretical speculation on subject.



In particular, the 4 pad setup was theorized better because of the increase in leading edge area, not just overall swept area. The weight alone would seem to negate any value seen with this setup though.
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