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Old 07-08-2005, 07:21 PM   #1
josh04
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Member#: 89288
Join Date: Jun 2005
Chapter/Region: RMIC
Location: SLC, UT
Vehicle:
2002 Rex

Default Underdrive pulley???

Does anybody know who has an underdrive pulley that has any problems or loves it to death. Because I just bought a Unorthodox Underdrive pulley. And I'm not sure exactly what it would do besides underdrive the voltage. I know their is faq, but I want to know more through other people not just one person.
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Old 07-08-2005, 07:45 PM   #2
wht052.5
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2005 2.5RS(I NDTRBO)
Chipped Crystal Gray

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It's lighter as well. Might affect idle.
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Old 07-09-2005, 04:23 PM   #3
Al_Smokemcrack
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Location: Rochester, NY
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1997 Legacy Outback
Glacier White

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None of your accessories will work as well, i.e. your alternator will make fewer amps, your power steering will assist less and your AC will blow less cool. Also, you might want to consider reading this.
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Old 07-09-2005, 04:30 PM   #4
sidewayz
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Location: Easton PA
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2001 S366 2.5RS

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dont sweat it.
113k on my .1 rs with ZERO probs.. and I have all my pulleys underdriven
albite my windows go up a bit lower but who cares
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Old 07-10-2005, 01:42 AM   #5
cudaeh
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Location: michigan rust isour statecolor
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2000 impreza 2.5 rs
metallic red

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i have a cheap a$$ 'bomz racing' pully. It weighs 1lb. I notice a smoother acceleration, it feels a bit more powerfull. the only down side i see is at night when you pull away from a light the headlights get brighter... thats all i notice.. I just installed a didgtial volt meter and at 700 rpm with the ac going windshild wipers on headlights on and radio on the voltage is 12.7 volts.. so you wont run into an issue with your battery discharging.
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Old 07-10-2005, 04:01 AM   #6
SLAKKER2282
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1998 SUBARU 2.5RS
RALLY BLUE PEARL

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I also have the cheap Bomz pulley and after the amazingly easy install, I do notice a bit more. It also brightens the headlight after moving from a stop. I dont see it as a big deal.I noticed no other negative effect. The ac is still amazing and the power steering hasnt gotten any harder. I am really happy with it. Just wait until you hold the original pulley in one hand and the new in the other. Youll feel the difference.
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Old 07-10-2005, 09:31 PM   #7
DragonRM
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Just a lighter pulley will give you almost as much performance without screwing up your electrical system at all.
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Old 07-10-2005, 09:54 PM   #8
jwan01
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95 L Project Car

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Lightened is better, IMO

Mr Josh $90 shipped

Cobb i think about 125 + shipping
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Old 07-10-2005, 11:37 PM   #9
DragonRM
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can get a full set from Holland Engineering (pro-ecm) for like 149 (not sure on price) from Larry at www.imprezars.com
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Old 07-11-2005, 01:10 AM   #10
Sic 2.5rs
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2001 GM6 RS
Silverthorn

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I've got a full set of unorthodox underdrive pulleys. I dropped .2 seconds in the1/4 but the lights do dim at idle. Full set of pulleys weigh 1.4 pounds stock pulleys were more like 7lbs.
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Old 07-11-2005, 08:39 AM   #11
Pat L.I.
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Location: West Haven CT
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2006 WRX TR
Aspen White

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i have the GFB lightened and underdriven pulley set. Yes it dims your lights slightly at idle, ac does not work as well unless the car is revving alot.
This doesnt bother me as i rarely use the AC. I liked the gains i got from the set.
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