2000 E46 328 Coupe Auto Underdrive pulleys

Notices
 

Thread: 2000 E46 328 Coupe Auto Underdrive pulleys

Reply to Thread
Results 1 to 3 of 3
  1. 2000 E46 328 Coupe Auto Underdrive pulleys 
    #1
    BMW Crazed
    Car Details
    jtsystems's Car Details
    Model of Car:
    328 Ci
    Year of Manufacture:
    2000
    Transmission Type:
    Automatic
    Car Body Type:
    Coupe

    Join Date
    Mar 2010
    Location
    St Albans
    Posts
    155
    Thanks
    28
    Thanked 34 Times in 25 Posts
    Seen these on various forums and was wondering what the benefits of these are?

    Was wondering if they are a worthwhile investment?

    Personally looking for smooth power delivery and responsiveness
     
     

  2. Remove Advertisements
    BimmerForums.co.uk
    Advertisements
     

  3.  
    #2
    Platinum BFuk Member
    Car Details
    mikaveli's Car Details
    Model of Car:
    535i Sport
    Year of Manufacture:
    1998
    Transmission Type:
    Manual
    Car Body Type:
    Saloon
    mikaveli's Avatar
    Join Date
    Jan 2009
    Location
    Peterborough
    Posts
    588
    Thanks
    562
    Thanked 229 Times in 162 Posts
    Pulleys would be unlikely to make more than 2-3 bhp real world difference.

    Give your car a good service and you'll see better results (spark plugs, filters, oil etc).

    If you want more power, get a decent CAI kit, look into whether the M50 mod is suitable (I don't know if the E46 328 has twin vanos) and get your car chipped.

    Chip and CAI you'll be looking at around 15 bhp. If the M50 mod applies, that's another 20 - all for less than a grand!
    "So give me one more platinum plaque and rap, you can have it back." - Dr Dre

    Spinnin' on digital 22's!
     
     

  4.  
    #3
    BMW Fanatic
    Car Details
    bmwfan's Car Details
    Model of Car:
    523i
    Year of Manufacture:
    2000
    Transmission Type:
    Auto
    Car Body Type:
    Saloon
    bmwfan's Avatar
    Join Date
    Jan 2008
    Location
    Leeds
    Posts
    92
    Images
    10
    Thanks
    10
    Thanked 21 Times in 19 Posts
    We used to use underdrive pulleys on race cars, because the higher constant revs in use meant things like the water pump and alternator were spinning too fast. Water pumps especially can cavitate at very high sustained RPM.

    Never heard of them being used to free up RPM though - I can't imagine there is much to be gained.. (apart from an undercharging alternator and a reduction in water pump efficiency...)
    Now driving a 2000 523i auto (with 190k miles!) and a Skoda Octavia 1.8T estate.

    I've had several cars since my last updates here - so won't bother posting pics.
     
     

Tags for this Thread

View Tag Cloud

Posting Permissions
  • You may post new threads
  • You may post replies
  • You may not post attachments
  • You may not edit your posts