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General E46 Forum
This is the place to get answers, opinions and everything you need related to your E46 (sedan, coupe, convertible and wagon) BMW!

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Old 03-12-2010, 11:22 AM   #1
vertdust
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opinion needed: UUC underdrive pulleys

are they worth it? I am getting my water pump replaced and thought maybe I could put these in as well. however, all the stuff I've read seem to indicate the gains are theoretical, if any. Does anyone else have an opinion on this?
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Old 03-12-2010, 11:30 AM   #2
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Old 03-12-2010, 11:34 AM   #3
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I got them they do help but nothing huge. Also resize your sig its effing huge
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Old 03-12-2010, 11:35 AM   #4
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i have them, kpeng has them, swinford HAD them (sold to kpeng)

no noticeable gains. no performance. just fun to say you have.
i WOULD recommend getting the UUC one over other, because they dont under-drive the alternator...

edit, did you get new ones swin?
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Old 03-12-2010, 11:46 AM   #5
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I have them, and did notice a difference. Steering is tighter, throttle response is better.

It's not a huge difference.

I wonder if running without an AC belt would also make a difference.
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Old 03-12-2010, 11:48 AM   #6
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Also resize your sig its effing huge
done
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Old 03-12-2010, 04:36 PM   #7
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i have them, kpeng has them, swinford HAD them (sold to kpeng)

no noticeable gains. no performance. just fun to say you have.
i WOULD recommend getting the UUC one over other, because they dont under-drive the alternator...

edit, did you get new ones swin?
You mean I HAD them, I sold them to Swinny, lol.
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Old 03-12-2010, 04:57 PM   #8
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wait, i thought you bought swinfords. wtf. i am so confused.
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Are boobs and hands polarly charged, thus causing the inevitable joining of the two? If so are some breasts simply charged backwards?

On a scale from 0 to 24...wait, 3 to 24, where 6 is the lowest and 12 is the highest, how freaking high re you right now?

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Old 03-12-2010, 05:02 PM   #9
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No sir, I sold them to Swinny because I can't use 'em anymore due to the SC.
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Old 03-12-2010, 05:07 PM   #10
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i have them, kpeng has them, swinford HAD them (sold to kpeng)

no noticeable gains. no performance. just fun to say you have.
i WOULD recommend getting the UUC one over other, because they dont under-drive the alternator...

edit, did you get new ones swin?

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Old 03-12-2010, 05:09 PM   #11
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No sir, I sold them to Swinny because I can't use 'em anymore due to the SC.
oooooooh, i see now.
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Are boobs and hands polarly charged, thus causing the inevitable joining of the two? If so are some breasts simply charged backwards?

On a scale from 0 to 24...wait, 3 to 24, where 6 is the lowest and 12 is the highest, how freaking high re you right now?

She's got you high, and you don't even know yet.
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Old 03-12-2010, 05:14 PM   #12
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Get Rogue, they are the cheapest i think.
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Old 03-12-2010, 05:22 PM   #13
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Get Rogue, they are the cheapest i think.
+1 I like the Rogue as well.

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Old 03-12-2010, 05:24 PM   #14
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Old 03-12-2010, 05:39 PM   #15
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I have the Bavarian Hypersports pulleys and I like them a lot. I do feel like I got some power gains, could be placebo. The best part about them is the underdriven steering. My steering felt so much better after the pulleys. I'd say that they are worth it.
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Old 03-12-2010, 05:52 PM   #16
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I have the Bavarian Hypersports pulleys and I like them a lot. I do feel like I got some power gains, could be placebo. The best part about them is the underdriven steering. My steering felt so much better after the pulleys. I'd say that they are worth it.
that would be the main reason i would get one.
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Old 03-12-2010, 07:06 PM   #17
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Euro Tuner Mag got 6hp on their 99 M3 sedan project car with UUC pulleys. Not an E46, but I would wager the gains are similar. Most BMW people say "it isn't enough to notice" about most mods. But if you get them ALL (intake, software, pulleys, headers, exhaust, etc) then there is power to be had. Will it be as noticeable as forced induction, no. But the above mods all work together and will compound on top of each other.
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Old 03-12-2010, 07:08 PM   #18
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I'm confused, how would the steering feel better if you underdrive the pump?
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Old 03-12-2010, 07:16 PM   #19
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I'm confused, how would the steering feel better if you underdrive the pump?
It'd feel tighter because the pump would turn slower. Adds a "heavy feel" that us LUK 20 guys enjoy normally.
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Old 03-12-2010, 07:17 PM   #20
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I'm confused, how would the steering feel better if you underdrive the pump?
It underdrives your power steering, so your steering feels heavier.
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