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Thread: 15 400R news

  1. #631
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    800 hp ' busa come with a 2 year warranty? I'm just teasin. I don't doubt your claims, just curious as to the longevity in a marine application, that's all. Merc validates all their products before production. 40 hours @wot full load. That's a some serious punishment.

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    800 hp ' busa come with a 2 year warranty? I'm just teasin. I don't doubt your claims, just curious as to the longevity in a marine application, that's all. Merc validates all their products before production. 40 hours @wot full load. That's a some serious punishment.

  3. #633
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    Seriously, why the heck is this double posting. Crap.

  4. #634
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    500ci hemi
    8000hp
    5 second w/ tee
    Pointless comparing drag engine and worse one that needs a gearbox.
    The v8 hyabusa tested in the middle east was a joke as an outboard replacement.
    Last edited by powerabout; 05-03-2016 at 10:56 PM.

  5. #635
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    Cheesy, try logging out and back in again, it might correct your double-posting issue.

    Greg


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  6. #636
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    Quote Originally Posted by AZMIDLYF View Post
    You've been playing with positive displacement blowers for a few years huh...look forward to your spin on these gentle giants.
    I'm more of a nitrous guy ( mad scientist ) , but I did run a 509 ci motor with a hi-helix 8-71 . Pretty mild in the scope of things and still made 1500 + . So putting out three times displacement is not a stretch . Putting it in the hands of the public and offering a wty could be a real problem ...

    Remember these "turbo cranks" .. LOL




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  8. #637
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    Is the boost level on these conservative or high to make 400 HP?
    I CAN ALWAYS MAKE ANOTHER DOLLAR, BUT I CANNOT MAKE ANOTHER DAY

  9. #638
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    I'm not sure of the boost level but it's definitely set at a conservative enough level to keep the engine reliable.


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  10. #639
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    On a side note, to this day, the introduction of the Verado 300 at the Miami Boat Show, 2004, was the most impressive product launch ever. It was just an incredible day. I need to post some photos from that.


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  11. #640
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    The 400 R develops 15 pounds - at sea level on a cool day with low humidity . When altitude and atmospheric conditions require , it has the ability to generate 29.5 pounds to keep the horsepower at 400. This is accomplished with an electronic boost control valve. Go to 400 Verado on U-Tube - Mercury Marine video explains it. At my altitude - 1800 ft , my 300x only makes about 305 hp on an ideal day - cool and dry - so most of the time I would guess 290 hp. So I should have about a 100 - 110 hp gain .I should have the 22 Talon in the water in about 10 days - I will post the results as soon as I shake it down.

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  13. #641
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    That seems like a lot of boost. Very cool. I appreciate the information Robert, and definitely want to see your Talon.
    Greg


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  14. #642
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    To say you at 1800' above sea level sound's like your at a disadvantage compared to us at 6' above.
    It's really about what the corrected density altitude is in your area for that day.
    Here in Florida I have seen mornings that were -300' below , and summer afternoons that were +3500' above .
    Pilots and dyno operators live by ( no pun ) the correction factor. I would hate to be in a plane at night where the pilot thinks he is 10' feet in the air and is really over a 100' and is going to just set it down nice and soft. Or buy a 350 hp motor and have it "only" make 270 when you get it home 1500 miles away.
    Boost or "manifold pressure" is a funny thing too. Say you make 15 lbs. Then put on a better flowing head. ( less restriction) you speed up yet boost goes down .
    It's good that today's engines deal with load , rpm , fuel curve and ignition timing . While it might not be optimal under every condition , it sure is better than wetting you finger sticking it the air and make a call on the tune-up ...

  15. #643
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    Quote Originally Posted by robert cruse View Post
    The 400 R develops 15 pounds - at sea level on a cool day with low humidity . When altitude and atmospheric conditions require , it has the ability to generate 29.5 pounds to keep the horsepower at 400. This is accomplished with an electronic boost control valve. Go to 400 Verado on U-Tube - Mercury Marine video explains it. At my altitude - 1800 ft , my 300x only makes about 305 hp on an ideal day - cool and dry - so most of the time I would guess 290 hp. So I should have about a 100 - 110 hp gain .I should have the 22 Talon in the water in about 10 days - I will post the results as soon as I shake it down.
    15lbs is pretty healthy.

    Is this the red Talon?
    I CAN ALWAYS MAKE ANOTHER DOLLAR, BUT I CANNOT MAKE ANOTHER DAY

  16. #644
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    .


    Charlie, this reminds of the SNL skit,


    " 20 Thousand Leagues Under the Sea "






    .

  17. #645
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    I wonder how the Verado 400R would respond to boost increases beyond stock.


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