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Old 06-02-2003, 03:22 PM   #1
tobRS
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Default pulleys

unorthodox underdrive pulley vs lightened pulley set

is there a big difference in how these will perform?
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Old 06-02-2003, 03:41 PM   #2
joefocker20
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I'd go with a lightened set personally, I wouldn't want to risk a dead battery (of course I have a 13lb battery) I bought a 1.19lb Crank pulley from mrjosh43 on www.rs25.com for $95 shipped. My car's revs rise and fall pretty fast with that and a 13lb flywheel.
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Old 06-02-2003, 05:39 PM   #3
kickin_81
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FYI, the alternator is designed to charge the battery at a certain voltage. Getting underdrive and lightened pulley(s) is known to produce 15% more power over just lightened pulley(s), but you may not be charging your battery to full capacity (or fast enough). I'm sure the underdrive pulley has been tested before they started selling them, but if you're gonna get an underdrive pulley, make sure it's not harming your car's charging capabilities. I'm not saying this from experience, it's just my common sense (and my common sense isn't very clean either ). FWIW, I have the same lightened pulley as Joe does... it just that I got mine first... haha! ...and getting lightened and/or underdriven pulley(s) is worth it if you aren't in it for a flywheel yet. Your car will rev faster (and smoother as it did with me).
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Old 06-02-2003, 06:28 PM   #4
zoinkssooby
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i have the unorthodox crank pulley and the only thing that happens is my lights dim at idle.
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Old 06-02-2003, 10:11 PM   #5
ShadowIMg
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Quote:
Originally posted by zoinkssooby
i have the unorthodox crank pulley and the only thing that happens is my lights dim at idle.
That's a "very bad thing".

If your lights are dimming at idle, you're not supplying enough juice for the draw of the electrical system, which means you're pulling battery power. This is harmful to the alternator, and prolonged you may find your battery to be very dead.
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Old 06-02-2003, 10:55 PM   #6
orndog
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Overworking the alternator *could cause a fire - ala Ford in the '80s.
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Old 06-03-2003, 03:49 AM   #7
Kostamojen
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Would any of this cause excessive battery corrosion?
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Old 06-03-2003, 04:32 AM   #8
zoinkssooby
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Quote:
Originally posted by ShadowIMg


That's a "very bad thing".

If your lights are dimming at idle, you're not supplying enough juice for the draw of the electrical system, which means you're pulling battery power. This is harmful to the alternator, and prolonged you may find your battery to be very dead.
its also common with every under-driven crank pulley for this to happen. which also brings the question of who has had a bad experience with an underdriven pulley? haven't heard anything myself other than stereo related but, if anyone has, let me know.
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Old 06-03-2003, 08:03 AM   #9
orndog
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Will a light crank pulley void your warranty? I was about to buy one, when I decided it wasn't worth voiding 80k miles of coverage.
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Old 06-03-2003, 08:05 AM   #10
Philfran
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I have an RVM racing underdrive pulley on my 2000 OBS. I don't have a problem with my lights dimming. I don't have a really big stereo (200 watts) and I don't have Fog lights. For your battery to go dead you would have to be stuck in traffic or idling for a long period or have a battery thats on it's last legs anyway. I'd go with the Underdrive and turn off your Fogs if your in traffic.
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Old 06-03-2003, 11:20 AM   #11
99OBSter
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FWIW, i have the Underdrive pulley and have for 70K miles on the original battery. No problems whatsoever, and I mean NONE except that my lights dim at idle. A subaru is not a 1980s ford, it will not catch on fire, and your battery will not go dead faster, unless, like someone said, you are stuck in traffic for hours with an almost dead battery. Your battery will recharge fine with normal driving.

I've heard on no one at all ever having trouble with an under drive pulley on a subaru. Now an Audi, that's a different story.
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Old 06-03-2003, 11:38 AM   #12
BOY
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500W amp, 97k mi, underdrive pulley installed at ~5k mi, stock battery died at ~88k mi. Survived sub-20F winters and +115F summers no prob. Don't believe the hype, there have been no recorded problems with the underdrive pulleys except when incorrectly installed (i.e. not torqued correctly). I'd love to try Mr Josh's alternator and PS pulleys with the UD pulley
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Old 06-03-2003, 12:08 PM   #13
joefocker20
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Mr Josh makes alternator and PS pulleys now?
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Old 06-03-2003, 12:16 PM   #14
BOY
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I thought so, maybe I was thinking of the GFB kits... who knows
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Old 06-03-2003, 01:33 PM   #15
joefocker20
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Quote:
Originally posted by orndog
Will a light crank pulley void your warranty? I was about to buy one, when I decided it wasn't worth voiding 80k miles of coverage.
It all depends on what you want to do with your car. I have only had to take my car in under warranty once, and it was for a window regulator. I bought my car in 2002, and I doubt that my warranty even applies anymore. My next mods are going to probably be Street Cams and a NX wet kit to tide me over until I can turbo my car in the winter.
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Old 06-03-2003, 01:54 PM   #16
BOY
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Buy a black pulley and 99% of dealers won't even know its there... shoot, my silver one has fooled at least 75% of dealers that have seen it. If you get a leaky crank seal, busted water pump, flaky alternator, power steering pump failure, ... etc. you're gonna be SOL on the warantee issue.
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Old 06-03-2003, 02:00 PM   #17
joefocker20
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I think my dealership would screw the car up worse anyway.. When I took my car in to have the window regulator replaced, it took them 2 hours to fix it.. I've had my pulley on for 5000 miles and no problems yet. Anyone had any problems with a lw crank pulley and also a lw flywheel on the crankshaft?
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