Motor Trend: 2018 PORSCHE 911 GT3 FIRST TEST: BEAUTY BEHELD
02-16-2018, 07:42 PM
#46
Rennlist Member
02-16-2018, 07:57 PM
#47
A few tenths is huge in a competition amongst professional racers. At a DE day, driver skill dominates by an order of magnitude.
02-16-2018, 08:09 PM
#48
Three Wheelin'
Obviously there is an advantage to using larger lighter rotor of the PCCB',s..use a more aggressive pad they will work better.. at the cost of longevity.
all I am saying, to make sense of the 100-0 braking times for the GT3, it seems the brake pad are more aggressive with the steel rotors.
02-16-2018, 08:40 PM
#49
Rennlist Member
I'm wondering the same thing. What tires was he so impressed with?
“Holy crap, the tire grip,” he nearly shouted after a few PDK laps. “Oh my God. I was so impressed with the tire grip, my God! I think I might’ve set my Turn 8 speed record. They are just so flippin’ sticky. It just felt so good. I think it has some real live aero because of the way it sticks, and it’s stable at high speed, in Turn 8, especially.”
“Holy crap, the tire grip,” he nearly shouted after a few PDK laps. “Oh my God. I was so impressed with the tire grip, my God! I think I might’ve set my Turn 8 speed record. They are just so flippin’ sticky. It just felt so good. I think it has some real live aero because of the way it sticks, and it’s stable at high speed, in Turn 8, especially.”
02-16-2018, 09:05 PM
#50
Originally Posted by Z06
Factory I guess can cheat a bit & use any pads they want for setting fastest laps.
Obviously there is an advantage to using larger lighter rotor of the PCCB',s..use a more aggressive pad they will work better.. at the cost of longevity.
all I am saying, to make sense of the 100-0 braking times for the GT3, it seems the brake pad are more aggressive with the steel rotors.
Obviously there is an advantage to using larger lighter rotor of the PCCB',s..use a more aggressive pad they will work better.. at the cost of longevity.
all I am saying, to make sense of the 100-0 braking times for the GT3, it seems the brake pad are more aggressive with the steel rotors.
02-16-2018, 09:51 PM
#51
Three Wheelin'
Usual the steel & the PCCB 18 GT3's use the same tires.. next is the friction of the pad, if the steels have a more aggressive higher friction pad, they will stop quicker from 100 mph.
02-16-2018, 09:54 PM
#52
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02-16-2018, 10:09 PM
#53
Test numbers in the past have shown that it's dead heat between the stock Porsche irons and the PCCBs in stopping distances. If they tested stock cars, these results have nothing to do with the brakes.
02-16-2018, 10:24 PM
#54
Race Director
Originally Posted by Z06
Usual the steel & the PCCB 18 GT3's use the same tires.. next is the friction of the pad, if the steels have a more aggressive higher friction pad, they will stop quicker from 100 mph.
02-16-2018, 11:02 PM
#55
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Practically any brakes, carbon or steel, even the wimpy brakes on base 911, are powerful enough to lock a wheel instantaneously without a delay. Which means that braking distance in one stop does not depend on brakes - just tires. You push the pedal and you instantaneously get maximum braking the tire can achieve with any non-broken performance brake package. Any difference in this test would be from tires or surface. This is a heavily boosted system with ABS - rotor or pad material are not going to make measurable difference on one panic stop. There is just no way aggressiveness of pads or any other characteristic of a normally functioning brake system caused 0.5 second difference in one stop. This is just silly.
02-16-2018, 11:09 PM
#56
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This seriously makes no sense. The friction of the pad is NEVER a bottleneck for a road car. The brakes are boosted - the booster will squeeze the caliper hard enough to stop the wheel fully regardless of the pad material, as long as the pad is not melting. I had pads delaminate and lose their material on both front wheels, and there was still enough friction to stop the car within close to normal distance from over 100MPH. The aggressiveness of the pad does not impact the distance of the panic stop in this car or practically any other street car with boosted brakes and ABS.
02-17-2018, 12:16 AM
#57
Three Wheelin'
This seriously makes no sense. The friction of the pad is NEVER a bottleneck for a road car. The brakes are boosted - the booster will squeeze the caliper hard enough to stop the wheel fully regardless of the pad material, as long as the pad is not melting. I had pads delaminate and lose their material on both front wheels, and there was still enough friction to stop the car within close to normal distance from over 100MPH. The aggressiveness of the pad does not impact the distance of the panic stop in this car or practically any other street car with boosted brakes and ABS.
So the coefficient of friction between the pad & rotor means nothing? All Brake pads have basically the same torque no difference ?
I apologize for my blunder🤦*♂️
02-17-2018, 01:13 AM
#59
Rennlist Member
Great article. Thanks for sharing....Anyone noticed the grip difference (1.11 VS 1.07) between manual & PDK. Any guesses why is this? Are they both on Michelin Cup2 tires or perhaps one car has more Miles on the set than the other? Or perhaps heat cycled out.......Interested to hear theories on this..... is it possible weight distribution which is little different between both cars...
The higher grip on the manual could also explain why the lap times are so close between both cars.... any thoughts on this??? Mark
The higher grip on the manual could also explain why the lap times are so close between both cars.... any thoughts on this??? Mark
02-17-2018, 01:18 AM
#60
Three Wheelin'
Great article. Thanks for sharing....Anyone noticed the grip difference (1.11 VS 1.07) between manual & PDK. Any guesses why is this? Are they both on Michelin Cup2 tires or perhaps one car has more Miles on the set than the other? Interested to hear theories on this..... is it possible weight distribution which is little different between both cars...
The higher grip on the manual could also explain why the lap times are so close between both cars.... any thoughts on this??? Mark
The higher grip on the manual could also explain why the lap times are so close between both cars.... any thoughts on this??? Mark