to the guys who have tested both models, did you notice any difference in the braking? since the sport has bigger rotors.

 

I really don't think you will noticed much of a difference. You have have to do a 60-0 foot stop and measure to see if the 13" makes a big difference.

 

I'd bet that around a racetrack the difference would be the driver- all the G's are fast and capable.

 

It's not just about distance. Bigger brakes dissipate heat better so it will experience less fading for repeated stops.

 

True but usually fading only shows when racing and not day to day driving unless of course you are racing somebody on your way to work.

 

do the rotors infiniti uses warp as easily as hondas?

 

I ever had a problem with my '03 after 54,000 miles.

 

I know people who had Inifiniti and Nissan but none complaints about brake warp.

On the other hand, my previous Accord had front brake warp that vibrates everytime I steped on the brake.

 

Now that it has been a few months, any update on braking from 80/70/60mph to 0mph between sport and non-sport?

 

braking distance is not affected by rotors or pads or calipers. tires and weight distribution affects braking distance, period.

brake size affects fade resistance.

pad and caliper design/quality affects feel and modulation.


i have a non-sport, and found that the smaller calipers with the lower mechanical advantage (vs sport) actually felt better (stiffer- which i prefer) to me at the pedal than the sport brakes. since i'd never push a street car to the point of fade, i decided that i preferred the non-sport brakes.

if this were a track car, i'd want the sport brakes (or something even bigger).

 

The G35 Sport thought have different size of tires than non-sport. Also, the Sport comes in "W" rated versus "V" for others. So, there has to be some differences in braking.

 

good point.

are the tires on journeys with the 18" performance tire and wheel package identical to the sports?

 

Sure it is - bigger rotors and pads mean more braking surface, so more friction, so more stopping power. I would probably agree that tires and weight distribution have MORE of an impact.

Anyway, to the point of the OP. I was lucky enough to have a multi-hour road course session with my G and several others. Some of us were driving Sports, some Journeys (and some Journeys with Sport wheel package). Long story short, the non-Sports kept up just fine, and the drivers didn't report any brake fade. BUT, they did have a ton more dust on their wheels than the Sports, which makes me think their brakes were working harder. So from this I would surmise that a) there's a difference, but b) it's not a noticeable difference, and not one that gives an advantage unless you're in truly extreme conditions (i.e. we did 20 or so fast laps each time, but were probably driving at 90% vs. 100% - I wanted to drive home in the same car... )

 

Altersys is correct. As long as the smaller rotors, calipers, pads are capable of locking up the wheel, then braking distances will be the same as larger brakes. It just won't have the other advantages of larger cooler brakes.

 

no.

do the rotors touch the ground? do the pads? what touches the ground? what is the real point of friction with the ground?

another way to look at it. are the "inferior" non-sport brakes incapable of locking up because they are so weak? that must be why only the sport cars have ABS.