[Digitalfiend]

Originally Posted by aspensti05

Actually the brakes are totally useless without sticky tires. Doesn't matter if you have the best brakes in the world if you are on skinny all season tires...

The tires stop the car, the brakes just stop the wheels.

True, but you also need a brake that can generate enough resistance to quickly slow a car moving at 130mph. If you had two cars, equal weight, with R compound tires doing 130mph, one with massive brakes and the other with regular/smaller brakes, which do you think will slow down faster?

Tires ultimately determine how much braking force you can apply but you still need brakes that can take maximum advantage of the tires capabilities.

[LOLSTi]

Originally Posted by Insane06STi

He`s one lucky guy.

definitely.

[aspensti05]

Originally Posted by Digitalfiend

True, but you also need a brake that can generate enough resistance to quickly slow a car moving at 130mph. If you had two cars, equal weight, with R compound tires doing 130mph, one with massive brakes and the other with regular/smaller brakes, which do you think will slow down faster?

Tires ultimately determine how much braking force you can apply but you still need brakes that can take maximum advantage of the tires capabilities.

He's on the street on street tires. The subject/title of this thread is "the power of brembo brakes" and this video does NOT demonstrate power of the brakes. It demonstrates the grip of the tires.

As for your example give the same car weight, same tires and different rotors/caliper in a fade free situation the two cars would slow down nearly identically. The biggest factor in your example would be fade and doesn't exist in your example or on the street in this video.

2nd to fade would be the surface area of the brake pad and the compound of the pad. Assuming the pad compounds are equal we are left with surface area which is an unknown in your example, but even if the surface area was 10% smaller it wouldn't cause that noticable of a difference in stopping power/distance. If the surface area is the same, but the brembo car has larger rotors then the brembo car might take longer to stop given that the surface area is the same, but the rotor is larger and heavier.

Bigger brakes do not mean smaller stopping distances. They act as a heat sink and prove their valve in track environment where heat from repeated heavy braking is an issue. On the street pad compound and pad/rotor surface area could make a small difference, but the two biggest factors on a street car's braking distance would be weight and tires, not brembo brakes. Using anything less tha a R compound tire on the street the average car will be able to trigger ABS with the stock brakes. If you can trigger ABS then you are under tired and over braked.

[the-one1]

Originally Posted by JRSCCivic98

It's the freaking Gumball you moron... do you even know what that entails? From the quote of the MR2 hitting Jetta video (year 2000 called and they want you back) it sounds like you don't. It's not about doing stupid stunts (well, sometimes it is)... it's about getting somewhere quick. When you do that things can happen. It's a part of life. BTW, these guys pay more to enter that race then you did for your STI. Jailtime and money are of no consequence to them.

BTW, had the accident happened and it had been Germany, it would have been the truck driver's fault for not checking before changing lanes. I've lost count on how many freaking semis I've had cut me off and I was doing the speed limit.

Wow . I had no idea I'd hit a nerve in someone.: I know what the gumball is. I'm just ranting about the stunt they pulled in traffic and put the saftey of all others on line. It had nothing to do with how much I paid for my STi or how slow my car is. Relax.

[lal]

depending on where in Italy they were,there was likely no speed limit, can't say it was a stunt, it was probably driving too fast for conditions(traffic), but they made it another day due to IMO good reaction time, good brakes & tires.
The truck driver's error, as was stated above.

[jimjohn]

okkkkk.... well looks like i caused a lot of drama... its all my fault im sorry you guys maybe i should just leave

[lal]

no no don't leave, you're loved, really you are.

[jimjohn]

really? really really?! .... OKAY ILL STAY!

[mikebravo]

lal is lieing to you

[jimjohn]

NOOOOOOOO... okay bye then WAHHHHH

[SoJDM.com]

My butt cheeks won't let go of the chair.

[jimjohn]

ahahhah.... okay? thanks for the INFOMERCIAL about your butt cheeks I THINK WE CAN ALL DIE HAPPY NOW!!! RRAAAWWWWRRRRR!!!!

[Digitalfiend]

Originally Posted by aspensti05

He's on the street on street tires. The subject/title of this thread is "the power of brembo brakes" and this video does NOT demonstrate power of the brakes. It demonstrates the grip of the tires.
As for your example give the same car weight, same tires and different rotors/caliper in a fade free situation the two cars would slow down nearly identically. The biggest factor in your example would be fade and doesn't exist in your example or on the street in this video.

2nd to fade would be the surface area of the brake pad and the compound of the pad. Assuming the pad compounds are equal we are left with surface area which is an unknown in your example, but even if the surface area was 10% smaller it wouldn't cause that noticable of a difference in stopping power/distance. If the surface area is the same, but the brembo car has larger rotors then the brembo car might take longer to stop given that the surface area is the same, but the rotor is larger and heavier.

I still disagree. I think you are seeing a combination of both. Since that car was specifically setup for running this rally, I would image it has a pretty darn good brake pad to go with the calipers.

Typically with big brake kits you upgrade to bigger rotors along with the caliper. More surface area and a bigger rotor allows more leverage to be applied by the caliper/pad. A larger caliper can apply more friction to a given surface than can a smaller caliper (makes sense since the pad is restricted by the size of the caliper.) As long as you aren't overloading the tires, this is a good thing.

My argument is that two cars, with different brake setups, decelerating from 130mph are going to have different rates of deceleration, up to a point. The car that can generate more friction/apply more leverage will decelerate faster because it can maximize tire grip usage. I would imagine most stock calipers/pads cannot overwhelm the tires at 130mph and I would hazard a guess that they also aren't maximizing the usage of the tires. Now, once the speed drops to 60-70mph, assuming constant braking force, I'm sure the two hypothetical cars would decelerate at similar rates, since the car with the bigger brakes would probably begin to overwhelm the tires as the speeds decrease.

Furthermore, I'm not talking a drastic difference in braking distance. Perhaps only a 10-30ft (remember the speed we're braking from). But in a situation like this, at 130mph, that distance could make a big difference.

A smaller caliper is going to apply less leverage than a larger caliper. At these speeds I think that will make a difference. Everything else you said is true though. To maximize stopping distances for a street car, I would focus on tires, then pads, front weight, and then a big brake kit (rotor/caliper.) For racing, I would go with a bigger brake kit to address heat dissipation (i.e. more consistent performance under heavy use), as you said.

[aspensti05]

Originally Posted by Digitalfiend

To maximize stopping distances for a street car, I would focus on tires, then pads, front weight, and then a big brake kit (rotor/caliper.)

That M5 is a street car and the tires stop the car. The brakes stop the wheels. This is a fact that isn't up for debate.

Again the subject of this thread is claiming the brembo brakes are what saved the day in this video and I disagree. The tires did. Sure maybe the upgraded brakes helped a tiny bit over the stock M5 brakes, but this wasn't a track session with repeated braking on R compound tires. It was a street car with street tires making a single emergency stop and the tires played the biggest role in stopping the M5 in this video.

[jimjohn]

hahaha... hmmm look... without the brembo's braking capability the tires will be useless therefore they both play a role with each other... if you dont have good brakes your tires are useless, if you have good tires your brakes are useless, but if you have BOTH then they are both the reason for why the M5 was able to stop... so enough debate this was just for ammusment