351w rebuild 1993 Ski nautique

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  • willholman91
    • Apr 2012
    • 1

    • Vero Beach, Florida

    • '93 Ski Nautique

    351w rebuild 1993 Ski nautique

    Engine was originally seized up due to all 8 cylinders being corroded so bad they were all locked up. The original Pro-Tec took a dump like so many more before it. This is why you replace exhaust manifolds. So salt water doesn't end up in your cylinders. Anyway heres what was done to the motor and the list of parts best I can remember right now.
    Bored .030 over, new bearings all around, electronically balanced, align honed
    9.6:1 Flat top pistons with free floating wrist pins
    Original crank, connecting rods
    Comp Xtreme Energy 264 hydraulic roller cam
    Crane Cams hydraulic roller lifters
    Comp Ultra Pro Magnum stell roller rockers
    World Products Windsor Senior 200cc intake runners, 64cc combustion chambers
    Double Roller timing set
    MSD Ready to run marine Distributor
    MSD 6T oval track ignition my buddy loaned me
    Holley 80 gph mechanical fuel pump
    Melling oil pump
    Moroso 7 quart steel oil pan
    Hardened pushrods
    Bronze distributor gear
    Edelbrock Rpm Air Gap intake manifold Gasket matched
    PCM exhaust manifold ported and matched to the wayyyy bigger Windsor SR exhaust ports
    ARP main bolts, head bolts, rod bolts, rocker studs, accessory bolts(12 pt stainless) valve cover studs, pretty much everything in or on the motor is ARP.
    Stock carb though considering quick fuel 650 marine carb
    As of now fine carb and ignition tuning hasn't been done just yet
    Runs on 100LL Avgas
    Freshwater Cooling
    Acme 12.5x15.5 4 blade prop

    Hope Everyone likes it! It was a project that started as a college summer project but as you can see it got kind of out of hand and went into the fall and just ran the third weekend of march. Should make about 400-425 HP at the crank, 430-440 Lb-ft torque. This is the first motor I've built so we had the machine shop assemble it but it has started a dangerous, expensive motor addiction for sure and I can't wait for my next project.

    American Cylinder Head Exchange in Vero Beach, Florida did all the machining and assembly of the motor. I'm very happy with the work they did and if you watch the videos on the Flickr that I will link, watch how the motor never has any vibration from idle all the way through full throttle. They can balance a motor pretty **** well.

    Heres the link...
    https://www.flickr.com/photos/121394715@N07/
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