1sik4dsc

iTrader: (1)

hey guys im a bit confused about how the ud pullies work , how would these ud pullies make our car faster and is it worth the money to buy?

bk2k3max

Well, for one the UDP weighs less than the OEM and on just that fact alone it'll allow your car's engine to make power faster/less weight=less inertia=faster rotation.

It is worth the money because it also lessens the amount of wear and tear on the crank due to having to turn all that heavier weight on the OEM UDP.

1sik4dsc

iTrader: (1)

Are they fairly easy to install?

IFuXwiTuZ

dont bother till they come out with supercharger

1sik4dsc

iTrader: (1)

supercharger ?

MaxLoverAz

iTrader: (1)

http://www.businessweek.com/autos/co...308_787575.htm

Mreim769

Unless you know your way around an engine I would not recommend f'ing with the pulleys.

1sik4dsc

iTrader: (1)

great link thanks, makes me wanna order the ud pullies right now lol

RacerX1320

iTrader: (3)

You sure you want one from Stealin? See if Unorthodox Racing has one.

* Just checked <UR site> they dont, id say wait a little longer.

Dave B

What a bunch of BS. Remember, the OEM VQ pulley is a damper. I had a UR UDP on my VQ30. It made zilch power on the dyno and absolutely no improvement in the 1/4 over 40 1/4 mile passes. Save your money. Underdrive and lightweight pulleys are one of the biggest BS mods out there. Don't let the Unorthodox Racing UDP propaganda sway you. Those guys are full of BS.

Alpha

I disagree as simple physics support UDPs. That's like saying weight reduction does nothing for performance.

I have one, and DO notice that the car revs and runs a bit easier since. Granted, it's only a 10% underdrive, but the decrease in rotating weight is nice.