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Thread: flat top pistons in a 383
          
   
   

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  1. #1
    scotter's Avatar
    scotter is offline CHR Member Visit my Photo Gallery
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    Car Year, Make, Model: 81 Courier / 383 BB
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    flat top pistons in a mopar 383

     



    I've decided to Put together a motor on the cheap until my budget catches up with what I want so I can get my project running ASAP.

    I have a low milage 1967 block that I could just put back together and use but I was thinking of replacing the dished pistons with flat top pistons instead. I have an entire rotating assembly from a 1970 block with flat top pistons in good condition. Does any one know if I can use the flat top pistons with the early closed chamber heads without hitting the valves ?

    I will be putting in a cam but nothing with a real high lift profile, and I'm open to suggestions. Keep in mind will be putting an EFI setup on this.

    I Basically am looking to build a fairly strong motor mainly with the parts I have on hand to get me by for a couple years until my "serious" enginne is finished.
    Last edited by scotter; 03-07-2008 at 01:31 AM.
    Go ahead and tell me what you think, just don't expect me to change my mind.

  2. #2
    techinspector1's Avatar
    techinspector1 is offline CHR Member Visit my Photo Gallery
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    Car Year, Make, Model: '32 Henway
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    Standard bore, 0.030" piston deck height, 64 cc heads, 0.015" steel shim head gasket, Chevy flat-tops equals 10.9:1 static c.r.

    This will put the squish at 0.045" and should allow you to operate on premium pump gas with a cam something like this. Call your favorite grinder for a recommendation.
    http://www.cranecams.com/?show=brows...tType=camshaft

  3. #3
    scotter's Avatar
    scotter is offline CHR Member Visit my Photo Gallery
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    Car Year, Make, Model: 81 Courier / 383 BB
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    My flat top Pistons are Mopar, I'll check the piston/deck hieght to make sure the numbers are similar.

    Do you know weather or not I will need valve reliefs using the stock heads?
    Go ahead and tell me what you think, just don't expect me to change my mind.

  4. #4
    techinspector1's Avatar
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    Sorry, as soon as I see 383, I think Chevy. Please disregard my post.

  5. #5
    scotter's Avatar
    scotter is offline CHR Member Visit my Photo Gallery
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    Car Year, Make, Model: 81 Courier / 383 BB
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    Oops and it looks like I posted in the wrong section. This should be in the big block mopar section. I also added mopar to the title to prevent further confusion, could an admin or moderator move this to the proper section - thanks
    Last edited by scotter; 03-07-2008 at 01:34 AM.
    Go ahead and tell me what you think, just don't expect me to change my mind.

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