Tri-Power 250

Discussion in 'Maverick/Comet Projects' started by Ken Thompson, Apr 10, 2011.

  1. Ken Thompson

    Ken Thompson Member

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    I have been playing with a D7 250 head. I have added 3 Carter/Weber progressive carburetors. The carbs are rated at ~180cfm each or a total of 540cfm. http://my.opera.com/kat4568/albums/show.dml?id=4969252
    My next step is to add a progressive linkage, port the head, add some pieces in the ends of the intake to, to direct the air into the 1 and 6 ports. My shortblock will be a 250 crank, 300 rods and custom pistons. The cam is up in the air. The transmission will be a toploader 4 speed and the final drive ratio will be 3.25 maybe 3.55.
    My goal will be 250hps 250 loghead six.
    Any suggestions other then replacing the 6 with a V8 I'll be interested in reading.:rofl2:
    Ken
     
    Ken Thompson, Apr 10, 2011
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  2. maverick75

    maverick75 Gotta Love Mavs!

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    I never knew 300 rods fit the small blocks! that's pretty neat!

    Carb setup looks great!
     
    maverick75, Apr 10, 2011
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  3. don graham

    don graham MCG State Rep

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    Looking forwar to seeing pics of the finished project. Good luck with it.:)
     
    don graham, Apr 11, 2011
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  4. Ken Thompson

    Ken Thompson Member

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    maverick75, 300 rods won't fit a stock 250. The 250 rod is 5.88 c/l to c/l and a 300 rod is 6.2 c/l to c/l. the stock compression height of a 250 piston is 1.5, so I need a piston with a compression height of 1.26 to 1.28. The crank journals are the same so no machining there.
    Ken
     
    Ken Thompson, Apr 11, 2011
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  5. Streetdeacon

    Streetdeacon Streetdeacon

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    I look forward to seeing how it turns out.
     
    Streetdeacon, Apr 11, 2011
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