anybody use the MR pulley set? - Zilvia.net Forums | Nissan 240SX (Silvia) and Z (Fairlady) Car Forum

Rezlo · 03-21-2005, 11:19 PM

No its not pointless, less weight = less rotating mass = more free'd HP

Bad things about UDP's are they slow your waterpump down, which in a hot motor like the SR that probably isnt the best Idea.

You make power from pullies 2 ways, Rotating mass and slowing accessories down, slowing the alternator or PS down a little rarely causes problems unless you are in a very cold climate or have a large sound system, but the SR's water pump will be slowed down with a UDP so best try avoid that.

03-21-2005, 11:19 PM	#20
Rezlo Zilvia Member Join Date: Jan 2005 Location: Chicago&South Africa Posts: 292 Trader Rating: (0) Feedback Score: 0 reviews	No its not pointless, less weight = less rotating mass = more free'd HP Bad things about UDP's are they slow your waterpump down, which in a hot motor like the SR that probably isnt the best Idea. You make power from pullies 2 ways, Rotating mass and slowing accessories down, slowing the alternator or PS down a little rarely causes problems unless you are in a very cold climate or have a large sound system, but the SR's water pump will be slowed down with a UDP so best try avoid that.