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Suspension | Chassis | Brakes -- Sponsored by 949 Racing Relating to suspension, chassis, and brakes. Sponsored by 949 Racing. |
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04-21-2021, 10:43 AM | #43 |
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Worth noting that installing a front BBK or overly conservative front/rear BBK system can *hurt* on bias.
For sure the "factory" BBK (PP Brembos) increase unsprung mass (I got aftermarket 2-piece rotors for the fronts to mitigate). And some fixed-piston calipers (not the factory Brembos) have issues with pad kickback and you can end up getting zero pedal resistance and zero braking for a *disturbing* amount of pedal travel! |
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04-21-2021, 11:03 AM | #44 |
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04-21-2021, 11:08 AM | #45 |
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All else being equal it will not.
What it will do for you is let you stop more often and at higher speeds without fade.
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04-21-2021, 11:10 AM | #46 | |
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Tires and suspension (geometry for reducing toe change, and damper adjustment to improve contact) are the ones that should be done first (geometry may not be possible in our case). Did you see any improvement when going to 2-piece related to braking confidence level? As you may have experienced, some of racing calipers require a pre-braking phase, where you blip the brake to make pads closer to the rotor before the braking zone. But I think this type of brakes should be used by professionals only, as you may get in trouble in the street. |
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04-21-2021, 11:18 AM | #47 | |
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Less variance during braking also helps to shorten distance, as the driver input can be more precise (and proper feedback from system also helps) Bur, as I mentioned, system response time may impct on that (the percentage may look negligible, and is for street applications, but may make a difference on race applications) |
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04-21-2021, 11:58 AM | #48 |
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That is technically not true. Since this thread has already been necro'd we can talk about this. But basically every track pad comes with a high torque (mu) which will in fact stop the car faster given the tires stay adhered to the road.
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04-21-2021, 12:30 PM | #49 | |
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It does not matter how fast you can stop the wheels turning if the tires just slide. Everybody can try to play the technicalities all they want my simple statement was "Brakes stop wheels. Tires stop cars" All the braking power in the world has zero value if you don't have the grip to use it.
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04-21-2021, 12:37 PM | #50 | ||
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No one is denying that tires aren't the most important factor here. Just pointing out that the claim you made is technically wrong.
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04-21-2021, 12:57 PM | #51 | |
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04-21-2021, 01:18 PM | #52 |
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I didn't expect to notice any difference and I didn't notice any difference! I was trying to get weight out of the car for time trials classification purposes and I highly prioritize weight off the front of the car. Li battery took off 24 lb., 2-piece rotors took off another 12. For ridiculous $$$/pound! But they also look neat :P
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04-22-2021, 08:46 AM | #53 | |
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My car is completely stock except for all the mods.
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04-22-2021, 09:18 AM | #54 |
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To repeat what has been said:
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04-22-2021, 09:28 AM | #55 | |
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Higher mu pads at the same applied torque with tires that maintain grip will result in shorter stopping distances. Even if you have crappy tires velocity plays a function. Let's say you are traveling at 120 mph and you slam on the brakes, the force required to lock up the wheel at 120 mph is much greater than the force to lock up the wheel at 20 mph.
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04-22-2021, 12:38 PM | #56 | |
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I'm not a tribology expert but I don't remember seeing a speed component affecting dynamic coefficient of friction in any of my related studies.
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