Dyno testing light weight rotors?
Last edited by juanmedina; Apr 7, 2010 at 07:23 AM.
Agreed. OTOH, if one already invested in lighter wheels and tires, the rotors are an excellent upgrade. We were able to reduce the rotational mass on my Evo by ~40lbs with Hankook Evos/RPF1s/Baer rotors. The freed-up power is the least of it. The car feels significantly lighter and it's much more fun to toss around. Every aspect of performance is improved. Better yet, a reduction in rotational mass makes life easier for the car, itself, generating an expansive performance envelope while putting less stress on the machine. Win-win.

Baer rotors, Kosei K1ts made close to 40 lbs weight savings and all of them are rotational mass!!!
Not sure if anyone has said it yet, but lightweight rotors and wheels technically don't "make" power. The power is already there, but with heavier setups more of the power is lost. With these lightweight setups there is less loss. Just wanted to clarify.
I got my Baers installed last week - thanks Emery. My stock rotors weighed a lot more (more material because they were basically new). I think after adding it all up I lost 21.8lb rotational mass
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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.
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