Losing rotating weight is part of making it faster.

 

+1

 

It's just alot easier to make power than drop weight that's the issue not too mention much much cheaper.

Once you put on a TBE, suspension, lightweight seats, f/rear support beams, lightweight battery, some 2pc brakes, MR or other lighter than stock rims you can get a EVO sub 3000lbs.

When you start talking AMS RR stroker, carbon driveshaft, Tilton Carbon/Carbon that's almost 15k right there for just 3 things.

 

Reducing rotational mass makes your car handle better as well. More power is not a substitute for better handling unfortunately. (Or the GT500 mustang wouldn't be the biggest POS car in the world)

 

If the person is really into reducing rotating mass it will not matter how much it will cost to him. It is up to him if it's worth it or not. Every little bit helps in terms of making something faster.

Lets say you have all the power mods and the other guy has all the mods you have, but he has done every single rotating mass reduction or even just some rotating mass reduction. Ask yourself who will win in that scenario. I will guarantee you will lose, because the other guy will have more power to the wheels and has better handling.

 

Thats my scenario. I have all the mods i want and am looking to make it faster other than performance...

 

So does anyone know what the factor is for rotating compared to stationary mass weight? Was it x4 or x8 or what?

Also, is unsprung weight just weight sitting there and not needed (such a the spare in your trunk for example) or is it something else?

 

From my understanding unsprung weight is weight that is not "controlled" by the spring for lack of a better word. So this would be tires, rims, brakes, etc..

 

So strictly suspension?

 

I think so.

 

Thanks...

Any more input on that or the correction factor?

 

rotational mass is 8 lbs for every 1 lb of sprung weight. and unsprung weight is basically suspension components.

 

Very good. Ive heard 8 pounds and 4 pounds.

So we can all agree thats its 8?

 

as for brake rotors there is a company on the east coast that makes them out of titanium yes it is quite a penny my buddy did it on his track honda along with the aluminum calipers and unsprung about 30lbs per wheel it was 2k in all but well worth it

 

well, its not really exact but its just a general idea. and that is only for rotational mass. you can also think of it as removing 100 lbs from the car equates to nearly .1 seconds in the 1/4 mile. so if you change wheels/tires to a set that is 3.5 lbs less per wheel, that would equal .1 off.