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    #1

    Underdrive Pulleys

    If an engineering shop (in the States) was to measure up a set of under drive pulleys for a 350Z and sent me the info, I should be able to get a mate of mine (fitter and turner) to run me up a set of them fairly easily shouldn't I?

    By the time they are landed here they are over a grand Hence why I'm being a tight prick!

    Should I bother getting them measured up or is it eay to calculate the sizes you need?

    Are underdrive pulleys worth it?
    Originally posted by choppo
    Looking forward videos of OP doing the chicken dance in drag with bananas up the arse and other fruit around the face in gay hypnotherapist rape dungeon
    Tags: None
    #2
    Yes, they're worth it.
    Cheaper and Aussie made are NEVO - www.nevo.biz - and superb quality as well.

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      #3
      Oooo sweet Bill :D

      do they make em for e15ets as well? :D
      Originally posted by choppo
      Looking forward videos of OP doing the chicken dance in drag with bananas up the arse and other fruit around the face in gay hypnotherapist rape dungeon

      Comment

        #4
        You'll have to email John Harris, the guy that runs the place. He mainly does Toyota stuff but I know he doe the odd one-off.

        Comment

          #5
          Anyone else had a lash at these?

          Would be interested, that's all :D

          More so for the e15et than the 350Z, but both cars will cop it anyways
          Originally posted by choppo
          Looking forward videos of OP doing the chicken dance in drag with bananas up the arse and other fruit around the face in gay hypnotherapist rape dungeon

          Comment

            #6
            what about the stereo, would there still be enough juice to power it?

            what is the ballpark figure to get a set made up?

            Comment

              #7
              Pully sizes for underdrive are relaitveley easy to calculate as they are all just ratios, the hard bit is the design of the belt running surfaces and attacment to the shafts (key ways etc)
              www.DRIVENFX.com Performance Engine Building, Auto Electrical (Wiring Looms, ECU Installs, Diganoses and Repair), Custom Automotive Electronics, Car Preparation, Car Setup, Trackside Services,

              PM me for more info

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                #8
                Full set sssgtr

                Both sets are costing me nothing and the guy machining them up has a full blown computerised workshop thingamy... apparently the only one in Townsville :D

                So I just need to work out those damn ratios
                Originally posted by choppo
                Looking forward videos of OP doing the chicken dance in drag with bananas up the arse and other fruit around the face in gay hypnotherapist rape dungeon

                Comment

                  #9
                  Ahh the good old C&C lathe. Surely there are some negative aspects of driving all the ancilleries slower than what the manufacturer intended. For example (just specutation) the alt may not be able to provide enough charge at idle, but it would be right once you start driving.
                  10.83 @ 125

                  Quickest stock exhaust manifold stud 2JZ in Aus.

                  Originally posted by cracka
                  Some conclusions empirically were that a large protruding ridge like a prolapsed arsehole around the runner was largely beneficial.

                  Comment

                    #10
                    Noob question: Whats the advantage of underdriving? Less load on the motor and a coupla HP?

                    Comment

                      #11
                      yeah same question for me does the alternator and waterpump not operate properly outside the optimum range and cause extra drag/friction? i mean if you have a motor that revs several thousand over its stock config?
                      Originally posted by Mr Cordia
                      And if anybody wants to know what the power output is FORGET IT, cos even if i say NO ONE WILL BELIEVE ME. Its the big shock.

                      Comment

                        #12
                        Underdriving by a small percentage shouldn't cause any dramatic problems. The main problems are generally caused by the removal of the harmonic damper...
                        ]
                        Dennis, thats CNC, not C&C... (computed numeric control)
                        Originally posted by PJ O’Rourke
                        Name me, if you can, a better feeling than the one you get when you're half a bottle of Chivas in the bag with a gram of coke up your nose and a teenage lovely pulling off her tube top in the next seat over while you're going a hundred miles an hour down a suburban side street.

                        Comment

                          #13
                          The advantages aren't huge, but every little bit helps.

                          I can't see why the alternator has to spin at ridiculour revs, so mine is 1:1 with the engine.
                          My water pump now spins at about 50% of the original speed, and the water temp is fine.
                          Other engines will no doubt get different results though ...


                          Comment

                            #14
                            CNC doh!
                            10.83 @ 125

                            Quickest stock exhaust manifold stud 2JZ in Aus.

                            Originally posted by cracka
                            Some conclusions empirically were that a large protruding ridge like a prolapsed arsehole around the runner was largely beneficial.

                            Comment

                              #15
                              80DGY you joined our aus300zx.com forum why dont you try searching there? you'll see that it is a dramatic improvement with proven dynos, further more some guys have done test on all auxilaries affected by the ud pulley and pretty much small losses if any and for the devices that cant be measured ie a/c, powersterring it has been said to be not noticable difference. Also on a TT it scored an extra 50-80kms out of a full tank as oppose to when running the original pulley. Id guess same power increases as our TTs on your 350.

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