Info on 1976 jetster engine size.
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Info on 1976 jetster engine size.

  1. #1
    Junior Member 76jetster's Avatar
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    Default Info on 1976 jetster engine size.

    I recently picked up a 16' 1976 jetster that is set up for a ford 302, I was wondering if anyone knows if the boat could handle a big block. I know with a big block and it being a 16' boat it would be a lot of motor but just wondering if it would be possible and not to much weight. Any info would be appreciated.
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    Just Me snoc653's Avatar
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    Room and weight are the two issues you have to consider. You can make just as much HP with a hot small block ford as you can most warmed over big blocks. So the question is, unless you just have a great big block laying around, why not stick with a small block? The boat is limited on room to begin with so why take up even more to throw in a big block. I personally would go back with a 383 sbc if it were me. The engine mounts are aren't that hard to find. And SBCs are dirt cheap to build. Add a stroker kit and be pushing well over 400 cu in. and as much power as that thing can handle.
    So many projects, so little time

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    Junior Member 76jetster's Avatar
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    I was leaning more towards a 383 since the parts are more abundant for sbc's vs the sbf's just wanted to see if it would be better to do a big block. I think I've decided on the power plant now, thank you.

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    Just Me snoc653's Avatar
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    Make sure you build the engine to peak within the pump's usable range. It doesn't work if your engine makes 600hp at 7000 but not enough to get there because the pump needs 500hp to spin 4500. There are a lot of impeller charts out there. Figure out what your boat has and build from there. Jets like torque and usually stay under 5000 to 5500 rpm. Yes some go way past that, but that takes piles of cash.
    So many projects, so little time

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    Junior Member 76jetster's Avatar
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    I'll definitely take that into consideration. Thank you for your help.

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    Senior Member jetboatperformance's Avatar
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    You should be able to rock just about anything in that boat you want , just finishing a nearly identicle boat at the shop with a 455 Olds , that hull could have a BBC, BBF Ls or a multitude of other power plants , will likely need an Impeller change depending on choices

  9. #7
    Junior Member 76jetster's Avatar
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    Thats good to know, I think if i can find a big block for a good price i might just go that route. i was planning on changing the impeller also since it looks like its sucked up a little debris in the past.

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