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under drive pulley

Discussion in '1994-2004 V6 Mustang Tech' started by 3.8twotoned, Dec 27, 2006.

  1. 3.8twotoned

    3.8twotoned Active Member

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    I want to order an underdrive pulley for my car and i was wondering if i should buy the asp 25% under drive pulley or if i should order the motoblue 42% underdrive pulley. Where is the best place to buy them?
     
  2. punypony

    punypony Sleeper

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    Just go with the 25% (the 42% isn't worth compromising the safety margin imo)you can buy it from vmptuning.com
     
  3. BirminghamStang

    BirminghamStang Audi Guy

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    yeah i got 42% and wish i got 25%

    i have a few charging problems so now i have to pay $30 for the alt. ODP
     
  4. punypony

    punypony Sleeper

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    ...oh forgot to mention, i have had the udp on my car for over a year now, and have had zero issues w/ it (im using the 25% asp pulley)
     
  5. MagnuM

    MagnuM Intake Spacer King

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    This seems to be very car dependent. I have had mine on since August without any problems aside from my lights dimming a bit at idle.

    Judging from your car though (3.8twotoned), I would guess you have a system, in which case you should get a 25% with Alt OD.
     
  6. Stangcharger3.8

    Stangcharger3.8 New Member

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  7. Rellik

    Rellik is a dirty pirate

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    A 25% UDP will still have enough power to charge a car with a 1000 Watt system in it. This can be accounted by numerous people on this site.

    A 42% is GENERALLY frowned upon by many because slowing your accessories down THAT much is taking it to an extreme for a couple of extra ponies over the 25%. Personally, I would never put a 42% on my vehicle.
     
  8. 03FR500

    03FR500 I'd Hit It

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    I have the 42% UDP and a 1200 watt system and have absolutely no problems. I have never even noticed my headlights dimming. I'm sure the 25% UDP are a safer bet. I'm happy with the choice I made.
     
  9. jj84756

    jj84756 New Member

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    i would stick with the 25%. that is what i have and never had a problem.
     
  10. alex33x@hotmail

    [email protected] GM's Fan in denial.

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    I agree, I had my pulleys for about a year and 2 months with 1200 watt system also and I never had a charging problem.
     
  11. 2kids3pets

    2kids3pets Williteverend

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    I went with the 42% and the o/d alt pulley...very pleased with my choice

    [​IMG]