1. This site uses cookies. By continuing to use this site, you are agreeing to our use of cookies. Learn More.

What Hp Gain Will I Get If I Put A Udp On

Discussion in 'General Tech and Maintenance' started by quick_civic, Mar 28, 2003.

  1. quick_civic

    quick_civic Junior Member

    Messages:
    16
    Likes Received:
    0
    Joined:
    Mar 26, 2003
    Does anyone know what kind of power gain i will get if i put a under drive pulley on. And what will it help if i do install one. And what kind should i get? Thanks for the help....
     
  2. KyleCrews

    KyleCrews Senior Member

    Messages:
    157
    Likes Received:
    0
    Joined:
    Mar 16, 2003
    Location:
    Jacksonville, FL
    I'm not sure what HP gains you'll get but i never did it because it makes everthing turn slower (alternator, water pump, and everthing else that runs from your belt). Just dont think that you'll gain enough from the pulley to make it worth everthing. Just my opinion. LOL
     
  3. E_SolSi

    E_SolSi Member of the 20 nut club Moderator VIP

    Messages:
    30,036
    Likes Received:
    3,970
    Joined:
    Sep 28, 2002
    Location:
    CT
    the slight power gain will be far out weighed by the price of replacing the alternator every other oil change

    id strongly suggest finding HP elsewhere
     
  4. chevy302dz

    chevy302dz Senior Member

    Messages:
    209
    Likes Received:
    0
    Joined:
    Oct 1, 2002
    Very little gain, completely not worth the money unless you have already done everything else.
     
  5. SpyOneUSN

    SpyOneUSN Senior Member

    Messages:
    108
    Likes Received:
    0
    Joined:
    Mar 13, 2003
    whut do crank pulleys do?
     
  6. KyleCrews

    KyleCrews Senior Member

    Messages:
    157
    Likes Received:
    0
    Joined:
    Mar 16, 2003
    Location:
    Jacksonville, FL
    It just an oversized version of the regular crank pulley. Bigger pulley = less power needed to turn the belt so you gain back a few HP. Definetly not worth it.
     
  7. pissedoffsol

    pissedoffsol RETIRED

    Messages:
    49,693
    Likes Received:
    54
    Joined:
    Sep 28, 2002
    Location:
    Retirement Home
    actually, its the other way- its smaller.
     
  8. djsgtrip

    djsgtrip Junior Member

    Messages:
    8
    Likes Received:
    1
    Joined:
    Feb 4, 2003
    Buying a crank pulley is definitely worth every penny. I have an Unorthodox crank pulley and I can actually FEEL a difference once I installed it. Considering the stock 1.6 sohc pulley weight of 6 lbs and the Unorthodox pulley's weight of 0.5 lbs!, you are saving 5.5 lbs of rotating mass off of the crank, which in turn helps the car rev faster and have a lot less load under acceleration. The gain in HP is not really from any under/overdrive of the pulley, but instead from the weight savings, when you're talking about the crank pulley. Other pulleys such as the alternator, and P/S pulley gains power thru underdriving, not weight. I have had Crank pulleys in two previous cars and everything ran perfect. No dead alternators. But only the Unorthodox pulleys are worth the money. Other ones are junk.
     
  9. pissedoffsol

    pissedoffsol RETIRED

    Messages:
    49,693
    Likes Received:
    54
    Joined:
    Sep 28, 2002
    Location:
    Retirement Home
    the problem is that they aren't harmonic balanced.
     
  10. likaciv

    likaciv Member

    Messages:
    30
    Likes Received:
    0
    Joined:
    Mar 25, 2003
    it just underdrives the accesorys, ie. ps pump, alternator, ac. The waterpump is timing belt driven, which will have to effect with the underive crank pulley. I had one on my d16 and did notice a difference, although the battery is never fully charged due to the slower turning of the alternator, ive since had to replace my 1 yr old bat. due to it always going dead.
     
Verification:
Draft saved Draft deleted

Share This Page