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under drive pulley installs

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  • under drive pulley installs

    well it was a good day out and my frined and I already had the tools out from doing an oil change on his comaro so we thougth we would go ahead and install my under drive pulleys. It took us a good couple of hours since we didn't know what we were doing at first and had to run up to the parts store several times to get a main crank seal and then a few more times to get the correct belt size. I ended up getting a gatoback belt. Then look pretty nice and more durable than other brands. <-- someone will object to that but w/e.

    Here are is the stock crank pulley and the UR underdrive pulley.

    [pic]768[/pic]

    Here is the alternator underdrive pulley

    [pic]769[/pic]

    This is my engine with the crank pulley removed.

    [pic]770[/pic]

    Here is the alternator whit the under drive pulley installed on it.

    [pic]771[/pic]

    My baby all jacked up in the driveway.

    [pic]772[/pic]

    This is me (on the right) and my friend (acting like a dork)

    [pic]773[/pic]

    We had to move the power stearing out of the way inrder to get the alternator out of the car.

    [pic]774[/pic]


    I can notice a little gain in performance and it sounds a little deeper when I accelerate. It also has this slight whizzing/hissing sound like a turbo spooling up [img]{SMILIES_PATH}/icon_twisted.gif[/img]. ROFL Now all the neons and hondas are gunna want to race me.

  • #2
    congrats.... how much you pay for em?

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    • #3
      I got the crank pulley for around $70 on ebay a year ago and I just bought the alternator pulley last week from http://www.customcargrills.com/ It cost me around $60.

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      • #4
        cool beans dude. Glad to know you noticed a difference, now I know what I might buy next for my car.

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        • #5
          Originally posted by hellix2484
          I got the crank pulley for around $70 on ebay a year ago and I just bought the alternator pulley last week from http://www.customcargrills.com/ It cost me around $60.
          Wow, that's a good deal. I see those UR crank pulleys for 170 all the time. I have considered it but there is such a debate on the harmonic balancer thing and I have never been able to make up my mind. They damn sure look nice.
          1993 SW2 - Slow and Low

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          • #6
            I forgot to take a pic of it once I had it installed. Next time I am in there and have the dust shield removed I take a pic and post it for ya. [img]{SMILIES_PATH}/smile.gif[/img]

            It is kind of hard to justify for $170 since you dont get that much HP out of it. but I got such a good deal on it I thought I would tyr it out. Every little bit helps.

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            • #7
              Originally posted by hellix2484
              I forgot to take a pic of it once I had it installed. Next time I am in there and have the dust shield removed I take a pic and post it for ya. [img]{SMILIES_PATH}/smile.gif[/img]

              It is kind of hard to justify for $170 since you dont get that much HP out of it. but I got such a good deal on it I thought I would tyr it out. Every little bit helps.
              Yeah, that's how I would think as well. For 70 bucks, it would be hard to pass on. I watch Ebay like a hawk all the time for good deals on Saturn stuff lol.
              1993 SW2 - Slow and Low

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              • #8
                yeah I haven't seen them at that price since then. [img]{SMILIES_PATH}/sad.gif[/img]

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                • #9
                  Originally posted by Plastic Fury
                  I have considered it but there is such a debate on the harmonic balancer thing and I have never been able to make up my mind. They damn sure look nice.

                  That's the same shit that i've heard ova here, that it'll fuck up you're engine cuz they're not balanced right and stuff


                  what's the deal w/ that anyways?

                  <br />
                  <br />---Sometimes the choices that hurt the most are the right ones----

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                  • #10
                    Originally posted by TurboSL1
                    That's the same shit that i've heard ova here, that it'll fuck up you're engine cuz they're not balanced right and stuff


                    what's the deal w/ that anyways?
                    I have never been able to get a straight answer on that. I have heard the same thing, that the balancer is there to keep the vibration, etc.. from the crank under control, it is a damper of sorts. So, remove the damper and what happens then???

                    That and the $170 price is what has kept me away from them. Now, Unorthodox Racing seems to have a good rep (they make an amazing amount of pulleys for Toyota, Nissan, Honda, etc..) so I figure they gotta know what they are doing but as I said, I cannot get a straight answer.
                    1993 SW2 - Slow and Low

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                    • #11
                      ok the reasoning behind the whole crank pulley/harmonic balancer is that the torque created by the engine causes the vibrations. those said vibrations can then cause crankshaft damage which most see as crank walk. the harmonic balancer is weighted to keep the vibrations down and prevent this crank damage.

                      so really using the underdrive pulley that doesnt have the mass needed, your gaining a small amount of power but is it worth the risk of engine damage? my opinion is no. the balancer is needed.

                      i really didnt want to say, but you did good work there.
                      Ian---The Fat Ass

                      1995 SL2-High compression engine FOR SALE
                      2010 Chevy Cobalt SS- tuned with plenty of goodness
                      2002 SC2-New daily
                      2017 Kawasaki Ninja 650 KRT- got a stupid deal
                      2003 Ford Taurus SES- free daily beater

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                      • #12
                        Its a harmonic dampener. There is an inner ring that is glued to the outer pulley section with I think p-urathane. The urathane absorbs the junk in the crank. The faster the crank moves, the higher the amplitued of the harmonics. That's why an SOHC has no dampener, and the DOHC does. If are pushing the rpm higher the stock redline, then you should keep the stock unit. If not, you should be ok with the lightened one. Be aware that the hramonics are know to cause excess wear to the 3rd main beaing.
                        -6S Resident Mechanical Forensics member #001.
                        1995 SC2 Turbo 3.6L DOHC, 6sp manual, Ford 8.8 rearend running on MS3x.
                        1998 F-250 5.4L triton...stock.

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                        • #13
                          Yeah that's not for me then cuz my 7500 RPM shifts will fuck up my B61P

                          <br />
                          <br />---Sometimes the choices that hurt the most are the right ones----

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