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brake upgrades effect on ESC
Cars today have ABS, EBD, ESC, "active city stop", self-parking
and more. I am wondering what happens if you upgrade the brakes (not with OEM brakes). About 10 years ago, I put bigger rotors and master cylinder on a car, and it did not upset the ABS, but that is a lot simpler than the modern stuff. I am most worried about ESC - I presume that is calibrated by computer simulations and road tests with a mad stunt driver. Now suppose your brakes have 30% more force than original- would the ESC get it wrong, and you end up sideways in a ditch? |
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brake upgrades effect on ESC
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brake upgrades effect on ESC
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#5
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brake upgrades effect on ESC
On 8/26/2013 9:17 AM, Nate Nagel wrote:
> On 8/26/2013 5:57 AM, wrote: >> Cars today have ABS, EBD, ESC, "active city stop", self-parking >> and more. >> I am wondering what happens if you upgrade the brakes (not with >> OEM brakes). About 10 years ago, I put bigger rotors and master >> cylinder on a car, and it did not upset the ABS, but that is >> a lot simpler than the modern stuff. I am most worried about >> ESC - I presume that is calibrated by computer simulations and >> road tests with a mad stunt driver. > > Pretty much right. The various parameters are indeed tested and tweaked > by real people wearing helmets and driving like a$$holes on closed test > tracks. > >> Now suppose your brakes >> have 30% more force than original- would the ESC get it wrong, >> and you end up sideways in a ditch? > > Probably not, but I in a car with ASC if you deviate from factory I > would make sure the parts are matched front-rear and side-side (a good > idea in any case.) The reason that I say that is that traction is > variable anyway, so the software is going to allow for variances between > dry asphalt, wet concrete, glare ice etc. But what you don't want to do > is put significantly more or less grippy brake pads on the front of the > car, say, and leave the stock pads on the rear. It might not cause a > problem - but then again it might. Likewise with tires, i'd prefer to > see all four tires match. > > nate Can vehicles with ASC be remotely hacked to handle like a dirt-tracker? Would be funny to see luxury SUV's spinning like tops. -- T0m $herm@n |
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brake upgrades effect on ESC
On Tuesday, August 27, 2013 12:23:01 AM UTC+8, Ashton Crusher wrote:
> The whole point of the wheel sensors is to determine what the wheels > > are doing. So I see no reason why you can't do pretty much anything > > you want on and mix and match within reason with one possible > > exception and that would be things that significantly change the > > height of the center of gravity, like throwing those ghetto style 24 > > inch wheels on a car that came with 15 inch from the factory. Even > > for that it's possible the car has "tiltometers" that would even > > account for that kind of change. ESC is a step up from say traction control. It also monitors the yaw of a vehicle and the steering wheel to predict if the car is about to skid off the road. It needs to modulate each brake. I imagine if you have 2 wheels on the bitumen and 2 wheel on gravel verge, it would be pretty clever to stay in control. |
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brake upgrades effect on ESC
T0m $herman wrote:
> > > Can vehicles with ASC be remotely hacked to handle like a dirt-tracker? > Would be funny to see luxury SUV's spinning like tops. > pull the fuse(s) for the appropriate module(s)...unless of course they also feed the ECM.... GW |
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brake upgrades effect on ESC
On 8/27/2013 2:58 PM, Geoff Welsh wrote:
> T0m $herman wrote: >> >> >> Can vehicles with ASC be remotely hacked to handle like a dirt-tracker? >> Would be funny to see luxury SUV's spinning like tops. >> > > pull the fuse(s) for the appropriate module(s)...unless of course they > also feed the ECM.... > > GW I was thinking along the lines of intentional destabilization, not just turning off the system. Luxury SUV's bring out the misanthrope in me. -- T0m $herm@n |
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brake upgrades effect on ESC
On 08/27/2013 12:58 PM, Geoff Welsh wrote:
> T0m $herman wrote: >> >> >> Can vehicles with ASC be remotely hacked to handle like a dirt-tracker? >> Would be funny to see luxury SUV's spinning like tops. >> > > pull the fuse(s) for the appropriate module(s)...unless of course they > also feed the ECM.... > > GW yeah, but these days, they don't have front/rear pressure proportioning valves and rely on the electronics. if you pull the fuse, you also pull pressure distribution management - and you don't want a situation where the rears are getting the same braking as the fronts. -- fact check required |
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brake upgrades effect on ESC
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