any body know how big rotor can i fit with 18" and stock brembo break?

 

Should be the stock 12+ inch diameter rotors. The Brembo caliper location is the limiting factor in determining how much rotor you can fit inside an 18" wheel. If you use the stock Brembo caliper bracket, you can only fit the stock 12+ inch rotor.

 

the stock size... but the Stop Tech rotors are hot... they are 2 piece aero rotors... and an overall 40lb weight savings...

http://www.performancenissanparts.co...&Submit=Search

 

Increasing rotor diameter without adjusting the piston bore is a big no-no. Unfortunately, there are many of these types of kits on the market...most include a bracket that moves your stock caliper out to allow for a bigger rotor (ECS Tuning, AEM, etc. have kits like this). What this does is increase the amount of brake torque on that end of the car. For example...the car can become overly front biased if you were to do this in the front only. Check out some of the tech articles on our our site and it will make more sense. Bottom line...if you move to a bigger rotor with all else held equal, you are increasing the brake torque on that wheel. To compensate, you decrease the piston bores in the calipers (which most manufactures unfortunately don't do).

Here's a great article to start with...
http://www.stoptech.com/whitepapers/...erformance.htm

 

thanks for all the advice, but i decide to change my brake system completly.

 

No way in hell are you going to save 40 lbs. With just the rotors.

On the Stop Tech site it says a total of 10.5 lbs of weight savings--2.75 lbs. lighter each rotor.

http://www.stoptech.com/press_releas...drkrelease.htm

 

sorry...

I heard 40lbs somewhere...

sorry about that...

I know the brake pros rotors add weight or are the same weight as stock... havent weighed them yet... but they sure are heavier then the stop techs'