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    • Harrop Engineering releases short teaser of their Eaton TVS1740 positive displacement M3 S65 V8 supercharger kit running

      The last time we saw the Harrop Engineering TVS based positive displacement supercharger kit was back in May of this year. In that article it was mentioned that a lot of work was still ahead especially in the area of tuning before this kit would ready to be released. Harrop Engineering clearly has been working on it and posted a teaser video you can see below showing the kit running on the S65 V8 with an M3 on the dyno.


      Unfortunately, no further details are provided with the video which just shows the wheels moving. No dyno figures yet but this is a complicated process and there is a reason nobody has brought a positive displacement M3 kit to market. It's very, very hard to do.

      Pricing is expected to be in the $12,990 area with a release this Fall.

      The main thing to take away is it's still coming and according Harrop relatively soon. BimmerBoost wishes them well and wants to make it clear when this comes to market it will be an achievement worthy of great respect. Good luck to all involved.

      This article was originally published in forum thread: Harrop Engineering releases short teaser of their Eaton TVS1740 positive displacement M3 S65 V8 supercharger kit running started by Sticky View original post
      Comments 62 Comments
      1. Ging's Avatar
        Ging -
        mustang guys will be confused to hear the sound of a eaton blower whining away for a M3. Cant wait to see more data. best of luck to Harrop
      1. Sticky's Avatar
        Sticky -
        Click here to enlarge Originally Posted by Ging Click here to enlarge
        mustang guys will be confused to hear the sound of a eaton blower whining away for a M3. Cant wait to see more data. best of luck to Harrop
        I definitely want to see the torque curve on this thing.

        Going to be a ton of fun to drive. I want to see the torque curve on the turbos too though.
      1. Ging's Avatar
        Ging -
        open dump waste gates would be fun to hear on a s65
        Click here to enlarge Originally Posted by Sticky Click here to enlarge
        I definitely want to see the torque curve on this thing.

        Going to be a ton of fun to drive. I want to see the torque curve on the turbos too though.
      1. G0TB00ST?'s Avatar
        G0TB00ST? -
        The second I heard that whine I thought Shelby lol
      1. G0TB00ST?'s Avatar
        G0TB00ST? -
        Click here to enlarge Originally Posted by Sticky Click here to enlarge
        I definitely want to see the torque curve on this thing.

        Going to be a ton of fun to drive. I want to see the torque curve on the turbos too though.
        Same here! I bet this setup pulls hard down low. I don't see this being a very good turbo platform though...
      1. Ging's Avatar
        Ging -
        why not turbo ? 11.5 to 1 is high just needs to be tuned right and not going for any huge power but a low comp build motor would be a beast. with 3 different types of boost soon to be had for the s65 people can pick what works best for them.
        Click here to enlarge Originally Posted by G0TB00ST? Click here to enlarge
        Same here! I bet this setup pulls hard down low. I don't see this being a very good turbo platform though...
      1. G0TB00ST?'s Avatar
        G0TB00ST? -
        Click here to enlarge Originally Posted by Ging Click here to enlarge
        why not turbo ? 11.5 to 1 is high just needs to be tuned right and not going for any huge power but a low comp build motor would be a beast. with 3 different types of boost soon to be had for the s65 people can pick what works best for them.
        Don't get me wrong I would love I see this happen, but I feel like there's a reason no other tuner has even givin it the time of day really. I see possibly reliability issues, running problems and turbo placement seems suspect from what I've seen.
      1. benzy89's Avatar
        benzy89 -
        Click here to enlarge Originally Posted by Ging Click here to enlarge
        why not turbo ? 11.5 to 1 is high just needs to be tuned right and not going for any huge power but a low comp build motor would be a beast. with 3 different types of boost soon to be had for the s65 people can pick what works best for them.
        The motor in itself isn't the problem, it's the material (Alusil) is known to have block flex problems, there's probably a ton of space issues (custom exhaust manifolds to mount the turbos pre-X pipe) and cost:

        Supercharger:
        1. 1 Supercharger
        2. 1 Bracket & Belts
        3. 1 Manifold
        4. 1 FMIC or Heat-Exchanger (and plumbing)
        5. BOV/Recirc Valves
        6. Tuning -- Much easier to adapt an SC to a non-FI car than a turbo


        Turbocharger:
        1. 2 Turbos
        2. 2 Custom Manifolds
        3. 1 FMIC
        4. 2 BOVs
        5. 2 Wastegates
        6. 1 Electronic Boost Controller
        7. 1 Manifold
        8. Injectors / Possible Fueling Upgrade
        9. All Necessary Vacuum Lines to Run WGs & BOVs
        10. All Necessary Lines/Tapping to Run Turbos (Oil/Oil & Water Cooling)
        11. Tuning in Conjuction with Electronic Boost Controller


        IF it's done right, the S65 would be really cool turbo'd. But we already know it's gonna cost more than any of the supercharger options, it won't really shine unless it's on a built motor & even though the Rotrex offers a lot of low-end TQ, the Harrop is going to going to fill that void for people who want insta-Tire Roasting-boost with a TS blower
      1. Ging's Avatar
        Ging -
        I know what the blocks are made of I've specialized in BMWs for 10 years and yes when you get to a power level sleeving the block needs to happen. Im not saying its a better kit or better way of boosting a s65 or cost affective. i love seeing new things for this motor the Harrop kit looks clean and should be a beast and this TT kit will be cool but it will take a ton of money, time and talent to make a retail-able kit but there will always be someone wanting big power or "look I have twin turbos " I just want to hear a TT s65 Click here to enlarge
        Click here to enlarge Originally Posted by benzy89 Click here to enlarge
        The motor in itself isn't the problem, it's the material (Alusil) is known to have block flex problems, there's probably a ton of space issues (custom exhaust manifolds to mount the turbos pre-X pipe) and cost:

        Supercharger:
        1. 1 Supercharger
        2. 1 Bracket & Belts
        3. 1 Manifold
        4. 1 FMIC or Heat-Exchanger (and plumbing)
        5. BOV/Recirc Valves
        6. Tuning -- Much easier to adapt an SC to a non-FI car than a turbo


        Turbocharger:
        1. 2 Turbos
        2. 2 Custom Manifolds
        3. 1 FMIC
        4. 2 BOVs
        5. 2 Wastegates
        6. 1 Electronic Boost Controller
        7. 1 Manifold
        8. Injectors / Possible Fueling Upgrade
        9. All Necessary Vacuum Lines to Run WGs & BOVs
        10. All Necessary Lines/Tapping to Run Turbos (Oil/Oil & Water Cooling)
        11. Tuning in Conjuction with Electronic Boost Controller


        IF it's done right, the S65 would be really cool turbo'd. But we already know it's gonna cost more than any of the supercharger options, it won't really shine unless it's on a built motor & even though the Rotrex offers a lot of low-end TQ, the Harrop is going to going to fill that void for people who want insta-Tire Roasting-boost with a TS blower
      1. Sticky's Avatar
        Sticky -
        Click here to enlarge Originally Posted by G0TB00ST? Click here to enlarge
        Same here! I bet this setup pulls hard down low. I don't see this being a very good turbo platform though...
        Why wouldn't it be a good turbo platform?
      1. Sticky's Avatar
        Sticky -
        Click here to enlarge Originally Posted by Ging Click here to enlarge
        why not turbo ? 11.5 to 1 is high just needs to be tuned right and not going for any huge power but a low comp build motor would be a beast. with 3 different types of boost soon to be had for the s65 people can pick what works best for them.
        It's 12.0:1.
      1. Sticky's Avatar
        Sticky -
        Click here to enlarge Originally Posted by benzy89 Click here to enlarge
        IF it's done right, the S65 would be really cool turbo'd. But we already know it's gonna cost more than any of the supercharger options, it won't really shine unless it's on a built motor & even though the Rotrex offers a lot of low-end TQ, the Harrop is going to going to fill that void for people who want insta-Tire Roasting-boost with a TS blower
        You're spending over $15k either way (tax, install, etc.) so who really cares about a few grand here or there?
      1. Sticky's Avatar
        Sticky -
        Click here to enlarge Originally Posted by Ging Click here to enlarge
        I know what the blocks are made of I've specialized in BMWs for 10 years
        Shouldn't you know the compression ratio of the S65 then?
      1. benzy89's Avatar
        benzy89 -
        Click here to enlarge Originally Posted by Ging Click here to enlarge
        I just want to hear a TT s65 Click here to enlarge


        Abandoned project, but there's your turbo S65 soundtrack
      1. benzy89's Avatar
        benzy89 -
        Click here to enlarge Originally Posted by Sticky Click here to enlarge
        You're spending over $15k either way (tax, install, etc.) so who really cares about a few grand here or there?
        People who'll be entering the E9x M3 resale market & will be able to buy a used supercharger kit for <$10k
      1. Ging's Avatar
        Ging -
        4.4l gts is 12.0:1 and 4L is 11.5:1 Click here to enlarge
        Click here to enlarge Originally Posted by Sticky Click here to enlarge
        It's 12.0:1.
      1. Ging's Avatar
        Ging -
        only a single heheh ya i saw that one to bad more didnt come of it.
        Click here to enlarge Originally Posted by benzy89 Click here to enlarge
        http://youtu.be/TrhqVDLl9Uc

        Abandoned project, but there's your turbo S65 soundtrack
      1. Sticky's Avatar
        Sticky -
        Click here to enlarge Originally Posted by benzy89 Click here to enlarge
        People who'll be entering the E9x M3 resale market & will be able to buy a used supercharger kit for <$10k
        People looking for a value should play elsewhere other than with boosted E9X M3's. If deciding between new kits once again a few grand here or there does not matter.

        Will turbos be more money? Sure, but not much more.
      1. Sticky's Avatar
        Sticky -
        Click here to enlarge Originally Posted by Ging Click here to enlarge
        4.4l gts is 12.0:1 and 4L is 11.5:1 Click here to enlarge
        Nope, all street S65's are the same compression ratio. Try again.
      1. Ging's Avatar
        Ging -
        Ill have to look of the factory docs i was looking at when i saw that or maybe i had to many wobbly pops and im off my rocker ...
        Click here to enlarge Originally Posted by Sticky Click here to enlarge
        Nope, all street S65's are the same compression ratio. Try again.