BBF Motor Build- Suggestions
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BBF Motor Build- Suggestions

  1. #1
    Junior Member
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    Feb 2015
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    Default BBF Motor Build- Suggestions

    19' Taylor SS jet boat that will run an Aluminum impeller. Impeller will be selected based on motors torque curve after build.

    I have the block torn apart at the machine shop. Trying to decide on compression ratio and cam for my setup to get it close to 500hp as possible. 500hp is not my goal, ill be happy anywhere from 4-500.
    850 dp carb
    Ford racing victor style manifold
    Currently 2.5" ID log manifolds
    D3ve heads intake and exhaust ported per Scotty tech index
    Stock sized valves in the heads
    Needs to run on 89 octane at sea level
    Keeping flat tappet cam style
    Had .030 taken off block decks
    4.2cc relief flat top pistons
    quench is between .040-.050
    still need to determine desired compression so i can have heads cut down accordingly

    What compression and cam would some of you run? I have my own idea, but want to hear others. Thanks!

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  3. #2
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    I would Chang the logs for headers for better the bad thing about logs your limited on cam size but I run the same head on my motor and with a flat top 9 to 1 and with those head it end up with 11 to 1 I run 91 octane for a cam have you looked at Jon kaase racing he build all fords

  4. #3
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    It is my suggestion that if you want to make power, get a set of aftermarket aluminum heads. Not only are they lighter, but they breather much better. All the Ford heads I have ever seen are shit in the breathing department.

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  6. #4
    tintingsandiego krusn56's Avatar
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    If running logs change them to thru bolt an get a step down snail to remove the first step. This will give you 3.5 an you can put a small piece of that on it to run 4 straight out if desired. I have d3's ported with smog hole welded up an running scorpion non adjustable roller rockers. Comp is about 9.5 flat tappet cam in the 450hp range... I'm about 5100 +/- 100 all in.
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  7. #5
    southwindsforsure justsquirtin's Avatar
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    I would for sure do aluminium heads running 6066 edlebrock with stealth intake 850 demon msd ign roller rockers
    about 500hp and still run 87 octane and turn 5200rpm ss a impellar 77mph 78 southwind

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