S650 Brakes

[Junkyard Dog]

Yep... even the Ecoboost with HPP (only 24 MY) has the same brakes as well.

Put the Trofeo RS tires on it, and with the lighter weight, that thing ought to stop in 10 feet.

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[Farmer Fran]

This is accurate. Braking at the threshold of locking the brakes or ABS kicking in will give a shorter stopping distance than just stomping them and relying on ABS or skidding. In everyday driving I would venture to say for 99% of people, having the bigger brakes wouldn’t make a difference in an emergency as they are going to stomp them as hard as possible. This is because they aren’t used to finding the limit of the brakes where it is second nature like an F1 driver. So, bigger brakes will stop better, but I’d say in the vast majority of emergency stops it’s going to make very little difference. On the track is a completely different story and it makes a huge difference. Disclaimer: I’m not an expert, but I did stay at a Holiday Inn last night.

You need to go watch braking tests.

 

[Yamazuki]

Put the Trofeo RS tires on it, and with the lighter weight, that thing ought to stop in 10 feet.

Never tested it while the Trofeo's were still on, but I took my cousin for a little ride last night and while 'inspecting' the brakes from roughly 70mph with the new Pilot Sport 4S' saw 1.34g locked on the accelerometer once we stopped. Still felt like about 10ft!

 

[John4]

My car has the basic brakes. I wonder if there's any way to reduce stopping distance on the streets, with brakes that are not really hot.

My car has Pirelli P0 AS +3 tires, same size as original tires, and I've swapped the rubber brake lines for stainless braid lines (more solid feel).

My guess is that not much can be done, since braking distances are factors of tire grip and the ABS. Bigger disks shouldn't make any difference except under racing conditions when the disks have to dissipate a lot of heat., and likewise (I think) with the brake pads.

What am I missing?

• P Zero AS Plus 3

Just curious, what’s the underlying motivation behind reducing stopping distance? Do you plan to track the car or just street use? You can get really into the weeds on brake upgrades but if you don’t plan to track the car it can be a decent amount of work for maybe a limited practical return. Easiest thing to reduce distance would probably be to throw on some wider tires with a stickier compound. You can go all the way up to a 285 square setup with no rubbing or spacers if you wanted to keep a square setup like the original base.

 

[abstruse1]

Just curious, what’s the underlying motivation behind reducing stopping distance? Do you plan to track the car or just street use? You can get really into the weeds on brake upgrades but if you don’t plan to track the car it can be a decent amount of work for maybe a limited practical return. Easiest thing to reduce distance would probably be to throw on some wider tires with a stickier compound. You can go all the way up to a 285 square setup with no rubbing or spacers if you wanted to keep a square setup like the original base.

Underlying motivation is to make street driving just a bit safer.

 

[John4]

Underlying motivation is to make street driving just a bit safer.

Gotcha,
Not sure there’s a whole lot you can do to specifically make street driving safer, then. I started with the base GT brakes and swapped over to Brembos with slotted rotors and track focused pads. Stops really well on a track but has slightly worse low temp initial bite than the stock brakes. If it’s just street driving you’re trying to make safer I couldn’t say what would help with that.

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