Page 5 of 6 FirstFirst 1 2 3 4 5 6 LastLast
Results 81 to 100 of 113
  1. Collapse Details
     
    #81
    Registered jeffswav's Avatar
    Join Date
    Oct 2009
    Location
    Millstadt IL
    Posts
    367
    Thats the type of kit I was thinking of using, and they dropped the price. I need to take a look at the exhaust clearance.
    Reply With Quote
     

  2. Collapse Details
     
    #82
    Registered 26 Spyder's Avatar
    Join Date
    Jan 2009
    Location
    Osage Beach, LOTO
    Posts
    123
    Project is looking awesome! I plan a similar setup on the Squadron..
    Here are a few pics of some testing on the Cobalt I just completed.

    To address the functionality of the "Ram Air", Merc used it on its new 1300/1350 engine with a 50 HP gain! Apparently there is some truth to the theory...

    From Mercs website; http://mercuryracing.com/1300/
    "Air Intake
    The horsepower these engines boast is directly related to the way they breathe. The air induction. As is typical for most sterndrives, the 1300 breathes ambient air from the engine room. The 1350, on the other hand, breathes cooler outside air through a direct air induction system. It’s that cooler air that gives it the extra boost of 50 hp. The air induction system does require computer aided design (CAD) integration with your boat."

    As for the water ingestion a little mist, rain or spray would prolly never make it through all of the ducting and in to the TB. Especially at the speeds you would be running when it is raining. Just have a low spot in the duct and a small drain hole, 1/4" or so will be plenty. Anyway, I have ran engines with water and water/methanol injection so again a little spray will not hurt a thing.

    Now, if you stuff the boat and the wall of water hits the scoop that would be a different story....

    And it seems you have covered the engine compartment ventilation needs as well so again, awesome project!
    Attached Thumbnails Attached Thumbnails Cobalt 054.jpg   Cobalt 089.jpg   Cobalt 147.jpg  

    Reply With Quote
     

  3. Collapse Details
     
    #83
    Registered Offshore Ginger's Avatar
    Join Date
    Nov 2008
    Location
    Homeless in West Mich
    Posts
    1,928
    When i was at Skater we used those type of vents on the deck or Butlers as they were called .
    Reply With Quote
     

  4. Collapse Details
     
    #84
    Registered jeffswav's Avatar
    Join Date
    Oct 2009
    Location
    Millstadt IL
    Posts
    367
    Quote Originally Posted by 26 Spyder View Post
    Project is looking awesome! I plan a similar setup on the Squadron..
    Here are a few pics of some testing on the Cobalt I just completed.

    To address the functionality of the "Ram Air", Merc used it on its new 1300/1350 engine with a 50 HP gain! Apparently there is some truth to the theory...

    From Mercs website; http://mercuryracing.com/1300/
    "Air Intake
    The horsepower these engines boast is directly related to the way they breathe. The air induction. As is typical for most sterndrives, the 1300 breathes ambient air from the engine room. The 1350, on the other hand, breathes cooler outside air through a direct air induction system. It’s that cooler air that gives it the extra boost of 50 hp. The air induction system does require computer aided design (CAD) integration with your boat."

    As for the water ingestion a little mist, rain or spray would prolly never make it through all of the ducting and in to the TB. Especially at the speeds you would be running when it is raining. Just have a low spot in the duct and a small drain hole, 1/4" or so will be plenty. Anyway, I have ran engines with water and water/methanol injection so again a little spray will not hurt a thing.

    Now, if you stuff the boat and the wall of water hits the scoop that would be a different story....

    And it seems you have covered the engine compartment ventilation needs as well so again, awesome project!
    Boy those inlets may have made this project a little easier. I made the inside portion from scratch . I have seen that project on mwbp and I forgot all about how you did those vents. The scoops have been a real pain but they are looking better.
    Reply With Quote
     

  5. Collapse Details
     
    #85
    Founding Member / Competitor MOBILEMERCMAN's Avatar
    Join Date
    Oct 2008
    Location
    Lake Travis Texas
    Posts
    6,816
    Quote Originally Posted by Offshore Ginger View Post
    When i was at Skater we used those type of vents on the deck or Butlers as they were called .
    I thought those were called NACA ducts.
    Reply With Quote
     

  6. Collapse Details
     
    #86
    Founding Member / Competitor MOBILEMERCMAN's Avatar
    Join Date
    Oct 2008
    Location
    Lake Travis Texas
    Posts
    6,816
    Just remember. Air in, Air out.
    Reply With Quote
     

  7. Collapse Details
     
    #87
    Registered Offshore Ginger's Avatar
    Join Date
    Nov 2008
    Location
    Homeless in West Mich
    Posts
    1,928
    Quote Originally Posted by MOBILEMERCMAN View Post
    Just remember. Air in, Air out.
    Talk about airrrrrrrrrrrrrJim , yes those vents are NACA ducts and had Butler printed on them or should i say stamped in them and that is why... i call them Butler's , and the vents that we used at Skater were made of some type of black plastic which were glassed in under the deck and Jim only you might remember this name which is is John Sherlock who once tried using those vents on a 40 Skater to push air into the steps to give the hull more lift on one of the old Don Q rum boats .
    Reply With Quote
     

  8. Collapse Details
     
    #88
    Founding Member / Competitor MOBILEMERCMAN's Avatar
    Join Date
    Oct 2008
    Location
    Lake Travis Texas
    Posts
    6,816
    I remember him although, I didn't know him personally.
    Reply With Quote
     

  9. Collapse Details
     
    #89
    Charter Member phragle's Avatar
    Join Date
    Oct 2008
    Location
    Serious is the BOMB!
    Posts
    7,073
    What about injecting a surfactant into that air stream before it exits the step
    P-4077 "The Swamp" S.B.Y.C. and Michigan medboat mothership
    Reply With Quote
     

  10. Collapse Details
     
    #90
    Registered 26 Spyder's Avatar
    Join Date
    Jan 2009
    Location
    Osage Beach, LOTO
    Posts
    123
    Quote Originally Posted by MOBILEMERCMAN View Post
    I thought those were called NACA ducts.
    Yes, they are called NACA ducts.

    I bought a plastic NACA duct from a circle track car catalog, and I made molds from it so I could duplicate them in fiberglass to make them easier to graft in.
    There are many different shapes and sizes available. So the custom possibilities are endless.
    Cigarette uses a similar style vent on some of their boats. and I am sure a few other manufactures as well.
    Reply With Quote
     

  11. Collapse Details
     
    #91
    Registered jeffswav's Avatar
    Join Date
    Oct 2009
    Location
    Millstadt IL
    Posts
    367
    Here are the latest pics. I am making better progress on the vents. The inline air sander broke again and I started sanding by hand and I am not blowing through (as much). I should have sanded it by hand from the begining.
    Attached Thumbnails Attached Thumbnails ram air 044.jpg   ram air 045.jpg   ram air 046.jpg  

    ram air 047.jpg   ram air 048.jpg  
    Reply With Quote
     

  12. Collapse Details
     
    #92
    Registered jeffswav's Avatar
    Join Date
    Oct 2009
    Location
    Millstadt IL
    Posts
    367
    Buffed out the left side. Here are a couple of pics.
    Attached Thumbnails Attached Thumbnails ram air 051.jpg   ram air 052.jpg  
    Reply With Quote
     

  13. Collapse Details
     
    #93
    looks good!!
    Reply With Quote
     

  14. Collapse Details
     
    #94
    Registered Offshore Ginger's Avatar
    Join Date
    Nov 2008
    Location
    Homeless in West Mich
    Posts
    1,928
    Jeff , sometimes stuff like this is a lot of work put the rewards are even better because you did it yourself and with that in mind pat your self on the back.................L@@KIN G@@D
    Reply With Quote
     

  15. Collapse Details
     
    #95
    Registered jeffswav's Avatar
    Join Date
    Oct 2009
    Location
    Millstadt IL
    Posts
    367
    Thanks Guys, I am caught up with work until next week. I will be working on it tomorow and I may get it put back together this weekend. To bad the rivers are up or we may have tried it out on Sunday. The nearest lake is about a 1 1/2 hours and may not have enough time to do that.
    Reply With Quote
     

  16. Collapse Details
     
    #96
    Registered jeffswav's Avatar
    Join Date
    Oct 2009
    Location
    Millstadt IL
    Posts
    367
    OK, here is a project update. I installed the Ram Air and ran it today. It was very hot and humid, very high heat index. I would say the ram air is about a 2MPH upgrade and the 3" raised x about a 4MPH upgrade. I ran about the same speed today (considering the temps) as I ran with the hatch and air cleaner off on the test runs.
    Reply With Quote
     

  17. Collapse Details
     
    #97
    Registered jeffswav's Avatar
    Join Date
    Oct 2009
    Location
    Millstadt IL
    Posts
    367
    Here are a couple of pics in front of the house.
    Attached Thumbnails Attached Thumbnails boat 007.jpg   boat 006.jpg  
    Reply With Quote
     

  18. Collapse Details
     
    #98
    Registered Offshore Ginger's Avatar
    Join Date
    Nov 2008
    Location
    Homeless in West Mich
    Posts
    1,928
    Quote Originally Posted by jeffswav View Post
    OK, here is a project update. I installed the Ram Air and ran it today. It was very hot and humid, very high heat index. I would say the ram air is about a 2MPH upgrade and the 3" raised x about a 4MPH upgrade. I ran about the same speed today (considering the temps) as I ran with the hatch and air cleaner off on the test runs.
    Jeff , that is sooooooooooo c@@l and to think most of it was just a little hard work with no expensive motor upgrade's .
    Reply With Quote
     

  19. Collapse Details
     
    #99
    Registered jeffswav's Avatar
    Join Date
    Oct 2009
    Location
    Millstadt IL
    Posts
    367
    Thanks Artie, I am not real crazy about adding more power to the stock Bravo. I am running about 500HP at this point. There seems to be a lot of ways to squeak out speed with the setup. Even if somthing only adds a 1/2 or 1 MPH it adds up when you do them all. Next winter I may get rid of those tiny bubbles on the hull and do a little wet sanding.
    Reply With Quote
     

  20. Collapse Details
     
    That looks great. We run 10" duct to the TB on my boat. You can't beat cool, clean air.
    Reply With Quote
     

Posting Permissions

  • You may not post new threads
  • You may not post replies
  • You may not post attachments
  • You may not edit your posts
  •