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  • underdrive pulley?

    i was wondering if you guys that have underdrive pulleys and are having low voltage problems have just the crank pulley or if you have the alt. pulley also. i was looking into it and was wondering if it would cause a problem , i have a 200W amp hooked into 2 truck wedges (in hatchback)and was wondering if it would be cause prolems with the alt and battery.

    -ATL

    These were the ones i was considering, does anyone have them?
    93 3.4L camaro

  • #2
    i have the Rksport set that's the crank and altenator(altenator one is actually a little bigger) and i was having lots of charging difficulties when at a stop, especially at night. i got tired of break torqueing at all the stops to keep my volts up(they would dip way into the orange and then my ABS light would come on) so i switched back to the normal one, and will only use the underdriven one when i go to the track.
    New Car: 2004 GTP Comp G (Test Vehicle) 13.936@99.32 <br />Mods: Cylinder Filter,No Mufflers, 3.3\" <br />Old Car: 2000 Formula 13.124 @ 106.01 with 2.73\'s<br />Other Car: 1993 Firebird 16.1@83

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    • #3
      i have the ASP UD pulleys but i only installed the crank pulley. you could get them cheaper at www.summitracing.com. with the just the crank, full charge is at 900 rpm. with both crank and alternator pulleys, full charge is at 1100 rpm.

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      • #4
        can you use the same belt that you did with both on, with just crank? or do i need a new belt...

        cuz i dont like the voltage problem either..
        03 Subaru WRB WRX<br />Clear parking lights<br />Autometer Phantom Boost guage

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        • #5
          yep, i used the same belt and it work zccop2001, it should be ok for you...


          dave 2
          03 Subaru WRB WRX<br />Clear parking lights<br />Autometer Phantom Boost guage

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          • #6
            <blockquote>quote:</font><hr>Originally posted by mr_man:
            (altenator one is actually a little bigger)<hr></blockquote>

            The altenator actually should be bigger so it slows it down.
            2002 M5 Bright Metallic Silver <br />*Fully loaded and modded<br /><br />2005 GSXR 750<br />*Micron Serpent Race Exhaust *K&N Filter *Power Commander *Trying to hit 200 MPH!<br /><br />1970 SS 454 Chevelle Cortez Silver<br />*It can pass anything but a gas station

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            • #7
              On my 3.4, i have both ASP crank and alt pullys on... If its at night with the lights and AC on, you will run the battery dead as a doornail in about 15mins of idling. Under normal driving conditions, i have no problems at all. I ended up getting the biggest AC delco battery that would fit in the car and that helped alot too. The volts will dip on a regular basis to 11-12v when stopped, but it doesnt effect the operation of the car and its been doing it like that for over a year now. The only thing i do not like is the fact that when turing at an intersection, the turn signals blink at the rate of one flash per 3-4sec with the low volts. Oh well, it also helped me get .3 faster in the 1/4mi
              Ric Johnson<br />----------------<br />1995 Pro AM III #12<br />3.4 A4<br />KN FIPK intake with ram air mod<br />Flowmaster exhaust<br />RKSport IAT sensor <br />ASP Underdrive pullys<br />TB Bypass<br />PF52 larger oil filter<br />3.42 non posi rear end<br />DeCarbon Trans Am shocks<br />Eibach pro series springs<br />B&M Shift Plus+ (best $40 ive ever spent)<br />Custom made billet alum front end inserts<br />Interior trim painted to match the car<br />Awia CD player with factory bose sound system<br />Viper alarm system<br /><a href=\"http://www.proam.webhop.org/\" target=\"_blank\">http://www.proam.webhop.org/</a>

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              • #8
                i have an 800watt amp running off of my battery, could i still install the underdrive pulleys and have no problems?????
                1996 Chevy Camaro SS<br />#67 of 2,410 made that year with the slp package<br />Street Lethal Fbody Association Member<br /> <a href=\"http://www.cars-on-line.com/97cam11475.html\" target=\"_blank\">http://www.cars-on-line.com/97cam11475.html</a>

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