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  1. #46
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    Quote Originally Posted by MrG View Post
    On that port work I’ve always brought the exhaust ports to the casting and always seemed to have a very powerful blueprint to go by as far as transfers make them square with out changing port entry angle but mostly found it’s the feeds for the ports that are limiting power Attachment 514350Attachment 514351
    Have any more.pics or info on those port passages? You pull the sleeves to do that work? I have a spare 300 block I plan on pulling the sleeves and do some more aggressive port work. Hopefully get to it this Spring. Have an AE21 im gonna hang it off and see how it goes.

  2. #47
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    I’ve talked with Chris Carson and he’s done a 300hpdi to 250 efi VMAX with 225 heads and he said It makes 350 Hp with great Bottem an mid torque the pic of the one I have is a 3.3 ltr Evinrude with Dave Bush sleeves and pistons should be in the 390 Hp range with a 3.880 piston . I’ve notice how the boost port is like the 280 Mercury Click image for larger version. 

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ID:	514380now I just have to clean up the port and chamfer all the edges

  3. #48
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    Not to hijack - Where do you guys buy your hpdi pistons / gaskets / parts ?

  4. #49
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    I'm currently playing this game. I've had the local machine shops take care of it. But need to order pistons for my current HPDI build at the moment.
    Pro marine
    Wsm
    Wiseco
    They all make/ offer pistons for thr HPDI.

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