IS350AWD bbks for 250AWD?
10-18-10, 03:42 PM
#1
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IS350AWD bbks for 250AWD?
So from earlier posts is was said that 350bbks could not fit on 250 brakes because of the awd system that the 350 bbk will not fit
But since the 350AWD was out, is it possible for people to get the 350awd bbk to fit on the 250 brake system?
because there aren't many bbks for 250awd's and the 350 bbks are for now the best upgrade for the buck(i guess)
Any info's on that? Maybe Sewell will have an answer?
But since the 350AWD was out, is it possible for people to get the 350awd bbk to fit on the 250 brake system?
because there aren't many bbks for 250awd's and the 350 bbks are for now the best upgrade for the buck(i guess)
Any info's on that? Maybe Sewell will have an answer?
10-18-10, 03:52 PM
#2
So from earlier posts is was said that 350bbks could not fit on 250 brakes because of the awd system that the 350 bbk will not fit
But since the 350AWD was out, is it possible for people to get the 350awd bbk to fit on the 250 brake system?
because there aren't many bbks for 250awd's and the 350 bbks are for now the best upgrade for the buck(i guess)
Any info's on that? Maybe Sewell will have an answer?
But since the 350AWD was out, is it possible for people to get the 350awd bbk to fit on the 250 brake system?
because there aren't many bbks for 250awd's and the 350 bbks are for now the best upgrade for the buck(i guess)
Any info's on that? Maybe Sewell will have an answer?
Ask Sam aka ExclusivIS with the wald isf for details but when he had his 250 awd he had a 350bbk on it.
10-18-10, 04:09 PM
#3
Whoever said 350bbk will not fit on a 250awd should be spanked in the public for spreading false info lol.
Another reason why some ppl's advice on here should be taken with a grain of salt.
Another reason why some ppl's advice on here should be taken with a grain of salt.
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10-19-10, 11:31 AM
#10
On my old 2006 IS250 we installed the IS350 brakes and a noticeable difference in braking could be felt. Not only did the larger brake calipers offer more aesthetically pleasing look the braking performance was improved as well.
Anyone is welcome to make statements to the contrary but we speak from our failed attempts at getting it to work. We could not install the IS350 RWD front brake calipers to the front of an AWD IS250.
We have not however attempted to install the AWD IS350 calipers yet to a AWD IS250.
Darrel
10-19-10, 11:44 AM
#11
I have no doubt it might have felt better... but the car stopped in exactly the same distance as it did with the same brakes. Just as physics requires.
Larger rotors and more pistons do not reduce braking distance. On a street car they are purely a cosmetic enhancement. (though they might well "feel" different when installed).
It's only when things like thermal control become important, say on a track environment, that upgrades like that can make any functional difference.
10-19-10, 11:53 AM
#12
Quick correction here-
I have no doubt it might have felt better... but the car stopped in exactly the same distance as it did with the same brakes. Just as physics requires.
Larger rotors and more pistons do not reduce braking distance. On a street car they are purely a cosmetic enhancement. (though they might well "feel" different when installed).
It's only when things like thermal control become important, say on a track environment, that upgrades like that can make any functional difference.
I have no doubt it might have felt better... but the car stopped in exactly the same distance as it did with the same brakes. Just as physics requires.
Larger rotors and more pistons do not reduce braking distance. On a street car they are purely a cosmetic enhancement. (though they might well "feel" different when installed).
It's only when things like thermal control become important, say on a track environment, that upgrades like that can make any functional difference.
10-19-10, 12:33 PM
#13
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In physics Work=torque*angular distance, so if you increase the angular distance (diameter of the rotor), all other things being equal you increase torque on the rotor. So the IS350 rotors are 1.5" larger than the IS250's, they do increase braking power.
10-19-10, 12:45 PM
#14
Because the stock brakes already produce more power than the tires are capable of using.
And the tires are the part that actually stop the vehicle.
(Seriously, this is a pretty fundamentally understood point among brake engineers... once you can engage ABS (or lock the wheels on cars without ABS), which the stock brakes can do, adding "more braking power" is 100% totally wasted power)
This is why the formula for braking distance asks you about the CoF of the tires to the road, but does not ask or care about your brake pads, brake rotors, brake pistons, or any other element of your braking system.
As always I'd encourage anyone who still thinks you can "improve" your normal braking performance with brake upgrades read this, written by a well known expert in the field-
http://www.scirocco.org/faq/brakes/p...n/pfpage1.html
10-19-10, 12:57 PM
#15
Thanks for the further clarification Kurtz. If I'm understanding you correctly your argument in this case is stopping distance. If this is the case, I agree.
In reference to your article, do my comments not hold true?
"...a noticeable difference in braking could be felt....the braking performance was improved."
Darrel
In reference to your article, do my comments not hold true?
"...a noticeable difference in braking could be felt....the braking performance was improved."
Darrel