Dyno testing light weight rotors?
 

Quite a few of you have been following Shawna's Evo and the Tests we have been using it for. Last week she told me it was in need of brakes.

A while back we opened an account with Baer while they were still selling their two piece Evo rotors (two years ago). When we did that we purchased what we were told was the last of them. While I knew that's what I wanted to use for this project, they were simply not available any more. Long story short a quick phone call to Baer got us a few sets of rotors at our door a couple days later. They never put them back into production but "found" a few more rotors and decided to make hats for them.

Today we decided to test them, just as David did before. I remember a bunch of people not believing his tests before so we decided to do it again! This is what we found.


We strapped the car down and did a pull with the stock rotors: 313 TQ / 327 HP

Then actually jacked the car up ON THE DYNO and changed the rotors and ended up at 339 HP / 319 TQ. That's +12 HP and +7 TQ.

Weight:
Baer Front Rotor: 15.8 vs stock 17.75 = 1.95 each
Baer Rear Rotor: 11.75 vs stock 14.45 = 2.70 each

9.3 pounds of rotational weight savings going from a half worn set of stock rotors to these.

http://www.streettunedmotorsports.co...rotors_evo.jpg


Changing the rotors right on the dyno:
http://www.streettunedmotorsports.co...baer_test1.jpg

Stock Fronts:
http://www.streettunedmotorsports.co...baer_test2.jpg

New Front Baer's:
http://www.streettunedmotorsports.co...baer_test6.jpg
http://www.streettunedmotorsports.co...baer_test4.jpg

Stock Rear's:
http://www.streettunedmotorsports.co...baer_test3.jpg

New Rear Baer's:
http://www.streettunedmotorsports.co...baer_test5.jpg

http://www.streettunedmotorsports.co...baer_test7.jpg

http://www.streettunedmotorsports.co...baer_test8.jpg

http://www.streettunedmotorsports.co..._dyno_test.jpg

Wow em, just wow, Some serious testing!

I honestly never thought about rotors being less rotational mass, but that makes perfect sense lol
Its weird but it works.

Im blown away, I never would have thought so little change in weight would result in that much noticeable power!

That would mean the same applies for wheels and tires yes?

Wow I never would of that that actually made power! Would you say the same would apply for light wheel/ tire combinations? Similar gains anyway.

It should apply the same way.


-Em

So you can not buy these rotors? Im in need of rotors two and would like to lose some rotational mass in my car. Any suggestions ?

Good to know, thanks!

do you guys sell the baers? I know they have become difficult to find.

Very interesting!

I have these rotors. I was wondering what I was going to do when it was time to get new friction surfaces. Any Input on that or the people with them screwed?

Would love to see the HP difference with the AMS drag kit. Hey Em, whats the weight diff. between the Brake Man and AMS drag brakes?

I have three more sets of these rotors in stock.


Baer has friction surfaces left over but wont be getting any more.


The brake mans are quite a bit lighter than the AMS fronts. The rears I'm not sure about.


-Em

Awesome test Em! I'm sure you guys are happy with this.


-Justin

As a rule of thumb, the farther it is from the hub, the more difference it makes. So in terms of impact tires are first, followed by wheels, then the rotors. Herein lies the irony in folks installing very aggressive wheel/tire combos, hoping to make their cars look faster, when they're actually making the cars run slower.

Nice results.But why would you test/sell something that's not readily available.:confused: