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  • Weistec Engineering's updated M156 Stage III 3.0 liter twin screw supercharger produces another 40 whp

      • Weistec Engineering's updated M156 Stage III 3.0 liter twin screw supercharger produces another 40 whp

        Published on 06-07-2018 08:44 PM
        12 Comments Comments
        As you likely know Weistec's twin screw Mercedes-AMG M156 and M159 supercharger kits are centered around Whipple twin screw hardware. Whipple recently updated their 2.9/3.0 twin screw supercharger to a new third generation design.


        What kind of dividends does the new design pay? Well, fortunately Benzboost member @MR747 tested it out on his stock internal C63 M156.

        The result is another 40 wheel horsepower on a very, very, VERY conservative Dyno Dynamics dynamometer in Shoot_8F mode:


        You see gains throughout the entire curve. A very nice increase in efficiency.

        This is on the same 67mm pulley as before and 98 RON pump fuel.

        What will it do with more boost on race gas? Well, we'll have to wait on @MR747 to find out.

        This article was originally published in forum thread: Weistec Engineering's updated M156 Stage III 3.0 liter twin screw supercharger produces another 40 whp started by Sticky View original post
        Comments 12 Comments
        1. MR747's Avatar
          MR747 - 06-07-2018, 09:07 PM
          We are changing fuel pumps at the moment but i wont change tune yet car was running pretty lean

          I will post up some more testing in a week or so on pump 98 with 67mm
        1. Sticky's Avatar
          Sticky - 06-07-2018, 09:09 PM
          Whose pumps and what will the increase be?
        1. MR747's Avatar
          MR747 - 06-07-2018, 09:11 PM
          I will be using Aeromotive pumps increase im not sure but fuel system is what was limiting me before with 60mm and race gas with old blower when it went 9.95 it will be interesting to see how it goes once retuned
        1. Sticky's Avatar
          Sticky - 06-07-2018, 09:42 PM
          Click here to enlarge Originally Posted by MR747 Click here to enlarge
          I will be using Aeromotive pumps increase im not sure but fuel system is what was limiting me before with 60mm and race gas with old blower when it went 9.95 it will be interesting to see how it goes once retuned
          Also how long that motor lasts...
        1. MR747's Avatar
          MR747 - 06-07-2018, 09:48 PM
          This exactly LOL

          Hopefully she holds up Click here to enlarge
        1. Sticky's Avatar
          Sticky - 06-07-2018, 09:48 PM
          Click here to enlarge Originally Posted by MR747 Click here to enlarge
          This exactly LOL

          Hopefully she holds up Click here to enlarge
          I like your style.
        1. MLMHeadworks's Avatar
          MLMHeadworks - 06-09-2018, 10:08 PM
          What's up with that torque dip past 5000? Knock or are you moving the cams?
        1. MR747's Avatar
          MR747 - 06-10-2018, 07:51 AM
          Click here to enlarge Originally Posted by MLMHeadworks Click here to enlarge
          What's up with that torque dip past 5000? Knock or are you moving the cams?
          This is a back to back comparison same tune as previous blower with 67mm pulley

          On the new blower we fuel pressure dropped to 3.7 bar at 5000rpm picked up to 4.1 bar at 6500rpm

          It should be 6 bar we basically stopped and now upgrading some fuel bits and pieces

          There is more power in this current tune but we couldn't give it 100%

          I'll be back in a week or so and we will push it
        1. MLMHeadworks's Avatar
          MLMHeadworks - 06-10-2018, 12:38 PM
          Click here to enlarge Originally Posted by MR747 Click here to enlarge
          This is a back to back comparison same tune as previous blower with 67mm pulley

          On the new blower we fuel pressure dropped to 3.7 bar at 5000rpm picked up to 4.1 bar at 6500rpm

          It should be 6 bar we basically stopped and now upgrading some fuel bits and pieces


          There is more power in this current tune but we couldn't give it 100%

          I'll be back in a week or so and we will push it
          Gotcha, cool, look forward to seeing more, whats base fuel pressure if you don't mind me asking
        1. MR747's Avatar
          MR747 - 06-26-2018, 06:25 PM
          Couple more teaser pics

          Click here to enlargeClick here to enlarge
        1. CLSAMG63's Avatar
          CLSAMG63 - 09-08-2018, 04:38 PM
          MR747.... So adding the Gen3 unit made you run lean? Or was there other factors that caused that? I’m close to pulling the trigger on upgrading to this new Gen3 unit but I want to make sure that there won’t be any leaning/fuel surprises. Thanks in advance.
        1. MR747's Avatar
          MR747 - 09-09-2018, 07:34 PM
          Hi Mate

          It made my current tune run lean as boost increased

          We had to modify my tune to make it work properly but also my pumps and injectors were maxed as we were pushing it