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    • Vonnen Porsche 'Shadow Drive' electric hybrid assist Dynojet results on Porsche 991.1 Carrera

      Vonnen produces an electric motor and hybrid kit they call the 'Shadow Drive' that will turn any 991 Porsche into a high performance hybrid. PorscheBoost wrote about their approach previously and it is quite the ingenious system.


      It seems Vonnen is changing a few things though as their site no longer mentions a Stage 2 electric motor and only discusses the 150 horsepower system. The Stage 2 does not appear to still be in development.

      We do finally get to see dyno charts although Vonnen does include the raw Dynojet graphs with peak figures. What you do clearly see is the torque increase is massive and practically instant:




      Now, imagine for a moment you have a big turbo 991 but there is an increase in lag with said big turbos. The Vonnen system would essentially reduce lag giving instant torque along with a huge jump in area through the curve.

      This is all designed to seamlessly supplement your drivetrain which makes it all the more appealing.

      The price? $75k so it is reserved for the very wealthy Porsche enthusiast and the diehard who wants to extract maximum performance.

      The Dynojet graphs are nice but we want to see some real 1/4 mile, 1/2 mile, and 60-130 results. For $75k you would think some timeslips or GPS readouts would be provided.

      Clearly, this is still early on but PorscheBoost certainly will continue to follow development.

      This article was originally published in forum thread: Vonnen Porsche 'Shadow Drive' electric hybrid assist Dynojet results on Porsche 991.1 Carrera started by Sticky View original post
      Comments 14 Comments
      1. subaru335i's Avatar
        subaru335i -
        This is awesome! That price is prohibitive but as with everything you pay to play at first but prices eventually come down.
        I really like the concept and an extra 150hp with instant torque in our 991.1 would be outstanding.
      1. Bowser330's Avatar
        Bowser330 -
        I agree, definitely too costly right now

        I wonder how much the parts alone cost....$75K seems a bit much.
      1. nbrigdan's Avatar
        nbrigdan -
        Is this kind of like how Koenigsegg integrates the electric motors on the Regara? Looks pretty neat.
      1. Zombie1's Avatar
        Zombie1 -
        I’d love to see a GT3 with this system!
      1. quattr0's Avatar
        quattr0 -
        It will definitely be cheaper once we are ready to make the switch as new technologies will also be found There are several companies already convert classic Pcar to fully electric ones.

        https://jalopnik.com/a-texas-startup...nce-1837173127
      1. leveraged sellout's Avatar
        leveraged sellout -
        I also like the idea of this in a GT3...could be quite interesting. I have no interest in any electric car, but a compact, "lightweight" hybrid system for brief power/torque boosts like this that bolts onto a linear, high-revving NA engine sounds like the perfect setup to me.
      1. Sticky2's Avatar
        Sticky2 -
        Click here to enlarge Originally Posted by Zombie1 Click here to enlarge
        I’d love to see a GT3 with this system!
        Bingo. The classic air cooled cars too.
      1. subaru335i's Avatar
        subaru335i -
        Looking at the previous article, it looks like the battery pack is only 1 kWh which is not much energy at all and it adds 80 lbs to the nose of the car and takes up a lot of the frunk storage.

        1 kWh supplying 130 kW of power (175hp boost) will only last 27 seconds before being fully discharged. It would be interesting to see the detailed regenerative logic and how what the state of charge looks like driving hard around a track with a lot of braking to potentially recharge vs just street driving.
      1. Bowser330's Avatar
        Bowser330 -
        Click here to enlarge Originally Posted by subaru335i Click here to enlarge
        Looking at the previous article, it looks like the battery pack is only 1 kWh which is not much energy at all and it adds 80 lbs to the nose of the car and takes up a lot of the frunk storage.

        1 kWh supplying 130 kW of power (175hp boost) will only last 27 seconds before being fully discharged. It would be interesting to see the detailed regenerative logic and how what the state of charge looks like driving hard around a track with a lot of braking to potentially recharge vs just street driving.
        Agreed, very small and not enough power to be relevant.

        The Taycan has immense regen thanks to its 800V battery, it can regen up to 265kw!

        As battery technology improves hybrid setups like the Vonnen will gain in popularity
      1. quattr0's Avatar
        quattr0 -
        Click here to enlarge Originally Posted by Sticky2 Click here to enlarge
        Bingo. The classic air cooled cars too.
        Here's one of many options for you.....

      1. Sticky's Avatar
        Sticky -
        Click here to enlarge Originally Posted by Bowser330 Click here to enlarge
        Agreed, very small and not enough power to be relevant.
        Why not? More than enough for a 1/4 mile blast. Electric nitrous essentially but no lag and it recharges.

        They obviously tried to keep it light which is great.
      1. Bowser330's Avatar
        Bowser330 -
        Click here to enlarge Originally Posted by Sticky Click here to enlarge
        Why not? More than enough for a 1/4 mile blast. Electric nitrous essentially but no lag and it recharges.

        They obviously tried to keep it light which is great.
        I should have specified that for the cost i don't feel its relevant.

        $75K, which is probably mostly labor since that's the installed price, is just too costly to gain much traction in the marketplace in my opinion. If power is your desire then its cheaper to sell the 991.1 and upgrade to 991.2 or 992.

        Additionally you are still modifying the car so if something breaks/fails that's related to the driveline Porsche "could" point to the electric motor as the scapegoat. I don't personally have the funds to go up against Porsche lawyers.

        We will see if their company is able to grow and be successful, I wish them luck, however for $75K i suspect most potential customers would rather use that to upgrade their 991 to a 992 hybrid which is in the works straight from Porsche, fully warrantied.
      1. Sticky's Avatar
        Sticky -
        Click here to enlarge Originally Posted by Bowser330 Click here to enlarge
        I should have specified that for the cost i don't feel its relevant.

        $75K, which is probably mostly labor since that's the installed price, is just too costly to gain much traction in the marketplace in my opinion. If power is your desire then its cheaper to sell the 991.1 and upgrade to 991.2 or 992.
        I agree cost is the main factor.

        If it can come down I'd love to pair this system with a big ass pair of tubos.
      1. Bowser330's Avatar
        Bowser330 -
        Click here to enlarge Originally Posted by Sticky Click here to enlarge
        I agree cost is the main factor.

        If it can come down I'd love to pair this system with a big ass pair of tubos.
        that would be cool