I am trying to do some power upgrades, or better, go faster upgrades on my 2002 lse.

I was thinking that using the powerslot rotors to replace stock might free up some rotating mass weight.

PS front: 18lbs
PS rear: 13lbs

What is the weight of the stock rotors?

Does the weight of the rotors make that much of a difference? I would focus more on the weight of the wheels.

When i replaced my rotors with the factory motorcraft version i was shocked at how heavy they were (fronts). I can understand the concept of you wanting to lighten the load, but i dont think thats an area that makes too big of a difference. Taking the spare tire out would yield more of a weight reduction. Anyhow, i kept my old stock rotors which i just weighed....16.2 lbs. The powerslot are about the same if not a tiny bit heavier.

Generally speaking , a lb or two means little , but a bunch of" pound or twos" will make a diff.
Every 100lbs is worth a 10th in the quarter.
2 lbs off every corner , spare tire , back seat , pass seat , etc? now you're talking!
Good luck.

Rotating weight makes much more a difference (tires, wheels, rotors...) then dead weight in the car (spare tire...).

From what I understand there are lots of variables that go into calculating rotational mass. Including something as simple as a wheel weight placement.

However, you can roughly figure on 1lb rotational mass equal 50lbs of curbside weight. With it taking about 10hp to move 100lbs, freeing rotational mass can get you moving faster.

If anyone knows a reasonable easy way to calculate rotational mass, OR if I am off base on these numbers, please post! thanks,

-Monnie

Google?
And yes, lower rotational mass can make a HUGE difference in response and acceleration, without any changes in actual HP.

True.....

But do you really want to have lighter, thinner, less substantial brakes on your car? Especially if it's your daily driver? Do you want to risk warping, cracking or wearing out your brakes far faster than normal just to save a few pounds?

The high preformance trend is to upgrade your brakes to larger units not smaller. So unless you are road racing or drag racing your LS and have pockets of money to throw at your car, why would you really want to?

One of the keys to GOING fast on the road is being able to STOP fast.

Thats why you get drilled and slotted rotors.
The real weight savings though, are gonna be made in wheel choice, especially if you have stock chrome.