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02-23-2005, 02:01 AM
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#1
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Administrator
Join Date: Dec 2001
Location: Burlington, On
Posts: 3,475
Car: 2008 C2S, 2009 E90
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Underdrive pulleys
I just ordered some UUC underdrive pulleys for my car. Ordered them from www.tunerworks.com
Which ones do you guys run? Any good/bad experiences? i know Thinair recommended the eurosport ones to me, but i dont think spending $100 more on pulleys is worth it.
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02-23-2005, 03:58 AM
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#2
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West Coast Contact!
Join Date: Sep 2004
Location: Kelowna
Posts: 1,358
Car: Estoril E36 M3 (OBDI
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what does this do? and hey sent my stickers yet? lol
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02-23-2005, 02:09 PM
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#3
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Administrator
Join Date: Dec 2001
Location: Burlington, On
Posts: 3,475
Car: 2008 C2S, 2009 E90
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Increases the diameter of the pulleys, reduces rpm on those components, ie: water pump. This frees up some hp(not add). Just a small, simple modification. 
...and yes, your stickers were sent out Monday.
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02-23-2005, 02:24 PM
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#4
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4th Gear Member
Join Date: Apr 2002
Location: Toronto
Posts: 688
Car: 2002 M3, 1997 Dakar Yellow M3, 1995 540i, 97 Supercharged 318is no longer...
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they are worth it bruce... you wont regret it for 250.
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02-23-2005, 02:38 PM
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#5
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BMW again.
Join Date: Feb 2002
Location: Toronto
Posts: 6,088
Car: 1994 325is
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lighter weight pullies, and the concept of them is to underdrive your accesories to that you can free up more horsepower.
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02-23-2005, 05:42 PM
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#6
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Wheelman
Join Date: Jul 2002
Location: Toronto
Posts: 12,081
Car: Affalterbach C63 AMG
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I also heard that it increases throttle response, which is something importent to me
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Maxbimmer Drama, You Gotta Love It
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02-23-2005, 08:17 PM
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#7
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1st Gear Newbie
Join Date: Nov 2004
Location: Vancouver, BC
Posts: 6
Car: 2004 330CIM
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I had UUC pulleys installed on mine.. well worth the money imo
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02-24-2005, 03:45 AM
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#8
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6th Gear Member
Join Date: Jun 2002
Location: Toronto
Posts: 2,906
Car: Z4MC
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I always had a question or two for this underdrive modifications.
I understand that these pullies will be freeing some hps, but what about
its maintanance? Will you still be able to use the dealer spec belts? or
Do you have to get the specific spec kind of belts for the pully?
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02-24-2005, 01:03 PM
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#9
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moderationistismingly
Join Date: Dec 2001
Location: Bradford, ON
Posts: 8,811
Car: 97 328is/05 Outback
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Quote:
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Originally Posted by mpower1226
but what about its maintanance? Will you still be able to use the dealer spec belts? or Do you have to get the specific spec kind of belts for the pully?
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No maintenence aside from changing the belt at the regular intervals. No you can't use OEM belts, because the underdrive pulleys are larger in diameter, you need a longer belt. Not a big deal, they're still a standard sized belt, just not standard for BMW. If you go to Canadian Tire or any car shop with the size you'll have no problem getting another one.
__________________
"Driving is like a narcotic, an addiction that can take over lives. It ruins people, breaks families apart, and even kills. It’s habit that needs to be fueled. Time, money, rationality, sweat, knuckle skin, and anyone who disapproves are of little importance to a driver, and are often overlooked. Hi, I’m Nelson, and I’m a drivaholic."
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02-24-2005, 01:12 PM
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#10
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6th Gear Member
Join Date: Jun 2002
Location: Toronto
Posts: 2,906
Car: Z4MC
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Quote:
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Originally Posted by thinair
No maintenence aside from changing the belt at the regular intervals. No you can't use OEM belts, because the underdrive pulleys are larger in diameter, you need a longer belt. Not a big deal, they're still a standard sized belt, just not standard for BMW. If you go to Canadian Tire or any car shop with the size you'll have no problem getting another one.
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ah.....so it is still standard automotive size..... Maybe I should look into this
underdrive pully. Is their a noticeble gain?
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02-24-2005, 05:20 PM
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#11
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2nd Gear Member
Join Date: Jan 2002
Location: Markham, Ontario, Canada
Posts: 132
Car: E36 M3 conversion Turbo
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I have a set of UUC on my car and you can feel a difference.
It feels like you just turned off your a/c.
The motor revs more freely less drag and when you have the a/c on barly notice the drag.
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Dynojet 248c @10.5psi 369rwhp & 381ft/lbs in 2002. 1/4 12.6@116mph 2001
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