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Old 02-14-2001, 12:29 AM   #1
Derres Catalano
Scooby Newbie
 
Member#: 3244
Join Date: Dec 2000
Location: San Diego, CA, USA
Vehicle:
2000 2.5 RS
Silverthorn

Post UD pulley or light weight stock size pulley?

I know that JC SPorts is selling pulleys for cheap right now, but which one is better? You would think that the UD pulley would give you more power (5-6 hp), but what do you get outta the light weight stock size pulley? Better throttle response? Which is better?
Also, I read somewhere about a crank pulley, I forget who sells it. But it is supposed to be UD as well, but for race applications. If there are benefits from a stock size pulley that is light weight, does anybody make a light weight crank pulley (stock size)?
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Old 02-14-2001, 12:56 AM   #2
Julian
Scooby Specialist
 
Member#: 1182
Join Date: Mar 2000
Location: Ventura, CA
Vehicle:
MY00 RS
BRP

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Some people have claimed improvements after the UD pulley was installed. Some people (*cough* Brucelee *cough*) have claimed otherwise. When you think about it, while the flat-four motor has less rotating mass, there's still a decent amount of weight rotating inside the block. What's a few pounds?

A non-related example: My other car's stock flywheel weighs 30 lbs. I replaced it with a 20lb. unit. I haven't noticed much (read: no) difference. Sure, I lightened the flywheel by 1/3, but compared with the total rotational mass, it wasn't a very big percentage, hence produced nothing much in the way of gains.

$150 (or so) for a pulley could get you a nice set of brake pads. One good tire End links...

Julian
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