Underdrive Pullies

Discussion in 'The Garage' started by Foster98GT, Jan 16, 2007.

  1. Foster98GT

    Foster98GT Well-Known Member

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    Who has them? What are the good and bad to them?
     
  2. Lightning Struck

    Lightning Struck Legend

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    i have had them on EVERY stang I have ever had. 1 V-6 car / 3 5.0 cars / 5 4.6GT's / and 2 4 valve 4.6 Cobras and I have NEVER had a problem with them other than the alt pulley not charging enough for a big stereo. They are a good way to " free " up about 10hp for a low price. They average about 100 bucks....some a little more just depends on where you get them from. I would suggest them for a nice bolt-on.
     
  3. scarface

    scarface Guest

    how will you run pullies with a blower?
     
  4. Lightning Struck

    Lightning Struck Legend

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    im pretty sure the stockers will have to go back on :-\
     
  5. scarface

    scarface Guest

    gotcha :)
     
  6. ju015dd

    ju015dd Well-Known Member

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    yeap
     
  7. fixthedoor

    fixthedoor Well-Known Member

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    O0 I second that. I just put a set on this past weekend. So far, engine runs like it did, except with a little extra oomph. Cheap, quick, easy way to get some extra ponies.
     
  8. 95-stang

    95-stang Well-Known Member

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    I put some on mine, only downside [i'm sure everyone knows] as the alternator is going pretty slow at tickover,
    if your out at night and sitting still, its best to put it in neutral, if you sit in drive, the voltage drops and the lights can dim quite a bit.
    No problems in the day though.
     
  9. Foster98GT

    Foster98GT Well-Known Member

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    So a Stereo is out of the question then?
     
  10. Matt94GT

    Matt94GT Legend Retired Staff SN95 Supporter

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    Well I got a stereo and its fine but at a stop light my voltage does drop down low, and I know its as a result of adding underdrive pulleys, I run a optimia battery and a 170amp alt. A capacitor should help me though.
     
  11. scarface

    scarface Guest

    yeah get a cap, and you wont drain so much on the battery from the amp and subs
     
  12. Nacho

    Nacho Active Member

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    Some company sells an OVER drive pulley for the alt. I compensates for the other 2 small pullies and doesn't give you charging problems. I've never used it but I was told it worked. Try leaving the stocker on as well, that was also said to work.
     
  13. G_94_T

    G_94_T Member

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    underdrives alone dropped my e.t.'s .15 in the 1/4......but yeah the voltage drops considerably at idle
     
  14. Stopsign32v

    Stopsign32v Active Member

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    Just don't put on the alt underdrive pulley. duh :D
     
  15. blackfang

    blackfang Active Member

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    I will not run a UDP for a 4V. The potential for the damage they cause isn't worth the 10 hp for me. They have been known to cause oil pum gear failure being the balancers aren't that great and have chewed up some gears and caused engine failures. Al Papito wont run them unless he has an ATI Dampner along with others. However atleast 9 motors have gone to the sh!tter because of them and Bob Cosby's motor was damaged but luckily he had billett oil pump gears which saved him.
     
  16. Lightning Struck

    Lightning Struck Legend

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    I have heard about that too, but from everything I have read that is caused by IMPROPER INSTALLATION, and NOTHING ELSE.
     
  17. AaRoN

    AaRoN King Post Whore

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    I have BBK's and noticed an immediate difference. Charging is an issue at idle.
     
  18. Midnight_Cobra

    Midnight_Cobra Member

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    MARCH PULLIES!!!!!

    Their craftsman ship is beautiful, I got the polished and I got a little wood when I opened the box for the first time! Install was easy and I felt a SOTP feel from them.
     
  19. blackfang

    blackfang Active Member

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