I was just reading the Motorvate udp analysis and it says about 75% of the HP gains are due to reduced weight while only 25% is due to the decreased size. If this is true, why not make a pulley that is lighter but the same size? Wouldn't this make it so the alternator could have the same output, but give a gain of 3.75-6 HP? Just seems like alot of people would go for this who wouldn't want the decreased power output of the UDP. Anybody know any reason this wouldn't work?

 

They are already on the market.

 

Oh, cool. Who makes them then? And is it actually worth doing?

 

considering all 4 pullys for a stang underdrived are 70$ and our one underdrive crank pully is somethin glike 200+ with minimal gains id say its a crock of **** and a rip off, bet you custom maxim apays like 80$ for theirs and marks it up like the other guys