It helps in several areas. Mostly small amounts but every little bit counts. The biggest factor in this case of rotors is your removing weight (unsprung) resulting in reduced sprung weight which is in motion. Never found a solid formula but for every pound that's reduce you lose a multiple of sprung weight. EXAMPLE ONLY: Losing 1lb of weight = 10lbs of rotational weight.

All this helps with making the car quicker, curb weight, and suspension load.

on my old 1999 prelude waaaay back in the day i went from Volk AV3's to some Volk te-37's.... OMG! the difference in handling was amazing! having felt that difference back then, im all for shaving weight anywhere in that area!

My wheels and tires lost me about 35 pounds or something, like 9.5 each back wheel and 8 for each front. That's huge off the unsprung rotational weight but I can't really say I noticed a huge difference. I would love to do a back to back dyno though if I still had OEM wheels. I'm not sure this is correct but I'd think getting rear rotors would be better than fronts since those are the drive wheels.

Z1: Any chance you will make two piece rotors for the stock setup? I've been looking for lighter weight rotors to replace my stock set. I think Racing Brake makes 2 piece for the front only, for the stock setup.

You talking about the base brakes or the sport brakes? If you got the sport brakes. Racing Brake have the rear rotors. ;)

Base brakes. No plans to be tracking the car. DD for the past 2 years. Just looking for lighter weight, nicer looking rotors.

nicer looking rotors? even if they were gold with diamonds on them the ugly part is the base caliper.

I have the front and rear 2 piece rotors installed with centric posi quiet pads ( for street use). I am LOVING this setup so far!! I have put about 150 miles on them since install and I am really impressed. The steering does feel lighter up front and more responsive! Braking feel is better but I cannot tell if distances from 60-0 for example are shorter at full pedal but at lower pedal input I do feel like the car is stopping more quickly.


Here are some pics:

And for you non facebook folks:
Front:
https://lh4.googleusercontent.com/-O...826_132523.jpg
https://lh5.googleusercontent.com/-r...84432499_n.jpg
Rear
https://lh4.googleusercontent.com/-a...20785449_n.jpg
https://lh6.googleusercontent.com/-1...04948891_n.jpg

The shipped product will probably look slightly better. This set was used for testing.

They released 2 piece rear rotors? Do they require any cutting/trimming of the dust shield for installation?

Looks good.

There still street testing them.

Nope. Same size as stock rotors so it is a direct bolt on. They are street testing still as spohn mentioned. I am just lucky / a guinea pig... lol.

I noticed they said you weren't going to come to work this week...

I agree 100%. I'm looking also for aluminum calipers that fit the base coupe OEM rotors. Not having much luck.