Big Rotors = less horsepower at the wheels Options

[anthony]

I've been watching Sports Car Revolution on Speed lately. Of course most of the cars they feature are Japanese but I really like that they put everything through a dyno. The balance bling bling and performance mods pretty well.

Anyway, they are doing an Acura RSX project right now. They fitted the car with a big brake kit - you know, big rotors and big calipers. Their times around the track didn't really improve even though they were faster around the corners because they could brake later.

After dyno testing they came to the conclusion that even though the big brake kit was lighter than the stock brakes it resulted in a 7 hp loss at the wheels because of the increased rotating weight of the big rotors.

I thought it was a pretty interesting result.

[Mueller]

hese things should only show up under acceleration,

you answered the question with that statement (IMG:style_emoticons/default/smile.gif)

accelerating a known weight.....

most of the cost-effective dynos are based on turning a large drum of a known weight and diameter.

less weight means faster acceleration...you must have a baseline first, either with more weight or less weight to compare the before and after