YOUR RESEARCHMyths Busted: Rotating Mass
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I appreciated this information so much I thought I'd share. If you're like me, and are looking for ways to reduce weight and increase performance, a little understanding goes a long way in helping you make good financial decisions. Lightweight rotors, flywheels, and other rotating mass is often said to save many times the weight of static mass. Read more and find out... http://www.w8ji.com/rotating_mass_acceleration.htm
Wow! that was a thorough and understandable explanation! Thank you for that, now where are the Tylenols! Helps me with the long term thought of changing out my fan pulley for a smaller one! Pete
I don't get it, what myth was busted? Are you doing 1/4-mile drag races in your 996? If so that article might be of use...
Agreed. It was informative, but I didn't find anything in there that busted myths. It did a good job at quantifying concepts that many people toss around casually without really understanding them.
Well, I was talking mostly about how reducing rotating mass is often said to be the equivalent of reducing 3x to 5x or more of unsprung mass. For me, it helped determine where money is better spent to increase performance of my car. I was reading lots of articles on lightweight brake rotors, flywheels, and all sorts of other items that can save weight... it also shows how larger wheel diameters hinder performance because you are adding weight on the outside radius of the rotation, etc. In all the discussions about tires and their performance, I'd be interested in knowing if any particular tires were lighter than others. Saving 8lbs or so there could make a pretty amazing impact on performance... on or off the drag-strip. (I don't drag race, but performing mods knowing I'm knocking a 10/th of a second off my 0-60 doesn't hurt)
Quotes source post: 11731397
Tires certainly are different weights relative to other tires, however only looking at weight can be very deceiving as two different tires can be labeled as the exact same size but then besides offering different grip levels due to the rubber compound, can differ in actual size quite significantly. Compare a 285/30-18 Pirelli PZero Rosso against a Sumitomo HTRZ-III. Same rated size, but the Pirelli is SIGNIFICANTLY wider on the same rim with a wider contact patch. Even if the tread compound were the exact same, the wider tire will perform differently depending on what you are trying to do with it.
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