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h22a4 boring question

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    #1

    h22a4 boring question

    i found a local h22a4 base engine for sale in pieces. dude says it burnt #2 piston and it scored the cylinder wall up. now i know this is a frm engine. how much can be bored off the stock frm sleeves before running into issues? i just want to get it running in my coupe. i figured buy it, send block to machine shop, hope they can cut .020 off it and put new pistons/rings etc in it, and reassemble it and ride out. now how far off am i with this idea? keep in mind this is a complete engine for under $200.
    COUPE K24
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    #2
    Originally posted by '93CB7Ex View Post
    i found a local h22a4 base engine for sale in pieces. dude says it burnt #2 piston and it scored the cylinder wall up. now i know this is a frm engine. how much can be bored off the stock frm sleeves before running into issues? i just want to get it running in my coupe. i figured buy it, send block to machine shop, hope they can cut .020 off it and put new pistons/rings etc in it, and reassemble it and ride out. now how far off am i with this idea? keep in mind this is a complete engine for under $200.
    Have you seen the cylinder wall? Do you happen to have pics? If it is in fact fixable with an over bore and you can be sure of that when you see it then you would take the block to a machine shop and ask them what it will clean up at. The machinist will ask you to provide the new pistons before they bore the block.

    I'm at the machine shop about once a week for small engines. They are not the same by any means but what I'm getting at is you really have to eye for what will clean up and what won't.

    You don't want to go any bigger than you have too. I see people with V8s try to gain cubes by over boring all the time and it normally creates overheating issues.

    I read on here before that it's best to find someone who specializes machining in Porsche engines for FRM sleeves. I don't remember why but I'm sure someone will chime in. I think it was Deev who said it...

    EDIT... Found it. http://www.cb7tuner.com/vbb/showthre...=200781&page=3

    Originally posted by deevergote View Post
    The only thing you'd want to keep in mind is the FRM sleeves. Find a machine shop that would be willing to hone those sleeves for you. Not every shop knows how to handle FRM, and a clueless shop could cause more harm than good!
    Originally posted by XCRN View Post
    If you do rebuild someone on here suggested to me with my H23 is to look into shops that specialize in Porche, they should be able to hone the FRM cylinders.
    Last edited by H311RA151N; 07-16-2014, 12:27 AM.




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        #4
        ^^^ That is awesome.




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