BMW 5ltr v-12
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BMW 5ltr v-12

  1. #1
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    Default BMW 5ltr v-12

    My friend plans to put a 5ltr all aluminum v-12 in his boat. Is there any reason why he shouldnt.

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    ~300 c.i., how much HP and torque and at what RPM's?

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    Quote Originally Posted by hotrod56cars View Post
    ~300 c.i., how much HP and torque and at what RPM's?

    About 320hp and its a high rpm engine so would guess low torque

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    Senior Member moneysucker's Avatar
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    I have seen turbo charged rotary motors in a mini picklefork. Possibly with the right set up it may work ok but I think that reinventing the wheel is going to cost more than going with a conventional set up. He will have to come up with mounts, exaust, PTO, etc. I would reccomend a light boat and you may have to use a smaller impeller or a gear reduction box as a jet pump loses eficiency at a certain RPM level. Also computers and water are not usually the best of friends. This set up would scream in an outdrive but I am not so sure that this would be the best use for this motor. A buggy would be a great place for this motor I would say.

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    Boss of the McIntyre Mob danhercules's Avatar
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    That motor would rock in a sand rail!!!


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    Resident Ford Nut Sleeper CP's Avatar
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    Quote Originally Posted by malgobay View Post
    My friend plans to put a 5ltr all aluminum v-12 in his boat. Is there any reason why he shouldnt.
    I know a guy who put a TT one in his sand car... 900 hp dev
    Ported head and intake every thing else was stock.

    I'll see if I can find spec's and pictures of it. Did you know that on the new V-12's from (6 yrs or so back) that the throttle peddle was drive by wire and it didn't open the throttle body more,it made the cam lift the valve more. It was/is one trick engine.

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    Quote Originally Posted by danhercules View Post
    That motor would rock in a sand rail!!!
    The owner of Pro-Tech metals in El Cajon has a buggy with one in it with Twin Turbos. The thing hauls ass.
    I'm not here for a long time. I'm here for a good time!

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    Senior Member bajadad's Avatar
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    Here's a BMW X5 V-12 http://youtube.com/watch?v=NtuVxi6hMqI

    This is no turbos....700hp
    Last edited by bajadad; 05-11-2009 at 08:31 PM.

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    Quote Originally Posted by Crusader Kid View Post
    The owner of Pro-Tech metals in El Cajon has a buggy with one in it with Twin Turbos. The thing hauls ass.
    JD sold it to some guy in Vegas.

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    NW Spectraholic Malcolm's Avatar
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    Quote Originally Posted by bajadad View Post
    Here's a BMW X5 V-12 http://youtube.com/watch?v=NtuVxi6hMqI

    This is no turbos....700hp
    I'll take yer word for it, my German is pretty rusty.
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  13. #11
    Bostick Racing Engines six-oh-nine's Avatar
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    Quote Originally Posted by Sleeper CP View Post
    JD sold it to some guy in Vegas.

    S CP

    I did the machine work (sleeved the block, ported the heads, etc..) JD's... Dose did the assembly. Also did the adaptor plate and flywheel (that was fun) It was one bad mo-fo... blew the tires off the chasis dyno... if you go to Dose dyno, you can still see little bits of rubber stuck to te ceiling of the dyno room. He has the other sleeved block and ported heads that were done at the same time, he wants to do a compression/nitrous build... ...just never got around to it. I do have to say... BMW does make a damn nice piece... too bad they are so expensive to build (vs an LS for example)


    Btw... Malgobay... I have a cnc program (mastercam) for the rear of the block to make an engine plate and the same for the crankshaft for a pto if your buddy needs such items.
    Last edited by six-oh-nine; 05-14-2009 at 02:38 AM.
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    Quote Originally Posted by six-oh-nine View Post
    it. I do have to say... BMW does make a damn nice piece... too bad they are so expensive to build (vs an LS for example)

    .
    Dose showed me all the internals on that engine. Did it have a factory dry sump or just the scraper and separate pick-up tubes in the pan?

    I sent JD an e-mail asking if he had any picture he could send me of the installation ( My old email crashed and I lost the ones I had) he has a new computer and doesn't have any of his old stuff loaded. He did say it made 750 hp at 6,500 w/ 18 lbs boost. He said I confused the 900 hp number with his new Mustang engine.





    Sleeper CP
    Last edited by Sleeper CP; 05-14-2009 at 10:46 AM.

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    Senior Member Delemorte's Avatar
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    Quote Originally Posted by malgobay View Post
    My friend plans to put a 5ltr all aluminum v-12 in his boat. Is there any reason why he shouldnt.
    I would think there would be a shit ton of fabrication work to get it mounted up to the hull and hooked to the jet. If he can fab all his mounts and drive line then F-it and do it.. If he cant he may want to consider the price envolved in mounting such a unconventional drive in jet boat. Also since your only talking 300+ HP i would think a comperable small block could get you there at a fraction of the price... Also think about building a one off exhuast system.. Seems like it would be pretty pricey.

    Just my .02.
    Last edited by Delemorte; 05-14-2009 at 10:47 AM.
    Quote Originally Posted by jetboatperformance View Post
    the ensueing fire would likely be extinguished by the sinking however

  16. #14
    Senior Member Hullshot's Avatar
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    the new direct inject motors hit the US in the 760 which was the N73 motor, it was not a vavletronic motor like the N62/TU, the N73 still uses the vanos system. The N62/TU motor which after about 45 seconds will open the throttle plate to 100% open and use the vavletronic motors to regulate valve opening at certain throttle pedal inputs. the older N72 used dual eml throttle which were also drive by wire and they have been in the E38 750il since 96.
    all the v12 are small displacement but high reving, 438 HP with 444lb torque.

    The boat would have to be lightweight for a motor like this as a drop in bmw motor to perform well in a boat. It would work but might cost way too much to get it marinized.

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