Underdrive Pulley's [Archive]

GrkBimmer82

11-20-2002, 02:16 PM

I'm debating whether or not to purchase these pulley's for my 325i. I'm buying my supercharger next year, slowly saving up. Should I just forget the pulleys and wait for the SP, will they interfere with the SP in any way? Is it an easy install? Is the increase noticeable/worth it?

Thanks

P.S. Great Site

Steve
2001 325i
ITG CAI, Supersprint Exhaust, H&R Springs,BMP strut, clear corner lights, haman eyelids, HID lights

MarvelPhx

11-20-2002, 03:39 PM

My main reason behind getting the pulleys was to help offset the drag from the supercharger. I didn't really notice much gain from the pulleys, but they look great and do free up 2-3HP from what I can tell.

Grey Street

02-24-2003, 01:55 PM

can the pulley upgrades be used with a step trans?

MarvelPhx

02-24-2003, 04:55 PM

Yes.

CLiverman

04-09-2003, 07:35 PM

I'd suggest the power pulleys from Rogue
http://www.rogueengineering.com/Merchant2/merchant.mv?Screen=PROD&Store_Code=RE&Product_Code=PP.E36&Category_Code=PP

"Why only two pulleys?
Whereas some other aftermarket pulley kits also include a replacement alternator pulley, we do not subscribe to this method of reduction.* By reducing the alternator's ability to provide adequate voltage to the system, you may encounter electrical issues not covered by the manufactures warranty.* For example, a Valentine 1 radar detector requires a specific amount of consistent voltage in order for it to work properly.* Without this constant voltage, the radar detector can begin falsing.* With newer cars with more and more voltage sensitive electronics being produced, we did not want to alter the vehicle's requirements for electrical needs.* Additionally, money is saved on your end since a 3rd and 4th pulley is not produced."

I had these put on and felt a differnce the minute I stomped on the gas! Less hesitation - easy Hp.

Cory
2001 330i, UUC Barbarian Sways, Rogue Pulleys, Dinan CAI, Racing Dynamics Strut Brace

<font size=-1>[ This Message was edited by: CLiverman on 2003-04-09 21:36 ]</font>

<font size=-1>[ This Message was edited by: CLiverman on 2003-04-09 21:37 ]</font>

Darius

04-09-2003, 10:42 PM

Wouldn't the size of the pulley determine the alternator output not the weight of it??? If the size of the pulley stays the same you should be fine.