Drivetrain Are pulley's year specfic?
#1
#4
#5
Originally Posted by BlueMCS
I've been told that the Helix pulleys do not fit the 2.0 litre cars.
Now now, don't confuse the newbies
The W11 engine has been using the same blower since inception. All current "supercharger reduction pulley's" will fit. Favorites are ALTA, Helix, and ET. 15%'s usually don't need a smaller/more flexible belt, however the 19% has always been a struggle keeping a belt on (esp. racing)
HTH,
Ryan
#7
Thanks for the info, just one more piece of wisdom I'll like to request - maybe two. For a 15% pulley - what is the belt part number for a stock belt either BMW or Aftermarket & which one is better?
Plus since I'm doing this upgrade solo - any suggestions, hints or advise?
Thanks
-CityHunterMini-
Plus since I'm doing this upgrade solo - any suggestions, hints or advise?
Thanks
-CityHunterMini-
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#8
Advice: use good puller tools, take your time, read Randy Webb's How-To's, and use Loctite Red on your pulley screws. You almost can't jack up the engine too-high. Don't use the MINI belt tensioner tool unless you've welded on added reinforcements. I've found the Napa 25-060539 belt is spot-on perfect for 15% pulley usage, but it's not needed unless you're getting belt slip, which is almost, but not completely unheard of.
#9
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