Valve FACE Concentricity
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Valve FACE Concentricity

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    Senior Member wagspe208's Avatar
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    Default Valve FACE Concentricity

    Bored, so here goes.
    How many of you builders check valve face runout? I would never dream of cutting a seat without checking runout, but I do not check face runout often.
    Sunnen has a nice fixture$$!
    I think Neway makes one too... goodson carries it too.
    I contemplated making one.
    Just another way to take even longer to build an engine.
    Wags

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    steelcomp was here
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    Quote Originally Posted by wagspeI'll give you one208 View Post
    Bored, so here goes.
    How many of you builders check valve face runout? I would never dream of cutting a seat without checking runout, but I do not check face runout often.
    Sunnen has a nice fixture$$!
    I think Neway makes one too... goodson carries it too.
    I contemplated making one.
    Just another way to take even longer to build an engine.
    Wags
    Give you one guess.
    If God is your co-pilot, change seats!
    Acts 2:38, the perfect answer to the perfect question.

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    Senior Member wagspe208's Avatar
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    I probably know the answer. BUT.. still a mildly interesting discussion (to me anyway)
    Wags

    Sunnen wants 600 or 700 for theirs. I have a mill and a hammer. Hell, I should be able to make one, buy a top of the line indicator and still only use it a couple times a year. LOL

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    Senior Member lbhsbz's Avatar
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    I made a simple v-block with an adjustable indicator stand on it...worked well.
    GN7: "If you were to have ever had two brain cells you could rub together and make heat, you be dangerous"

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    steelcomp was here
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    Quote Originally Posted by wagspe208 View Post
    I probably know the answer. BUT.. still a mildly interesting discussion (to me anyway)
    Wags

    Sunnen wants 600 or 700 for theirs. I have a mill and a hammer. Hell, I should be able to make one, buy a top of the line indicator and still only use it a couple times a year. LOL
    That's absurd. I've gotten to where I just automatically face new valves. My old machine isn't perfect, but it seems to be better than most valves are. I usually indicate the stem of about every fourth or fifth valve as I go through a set, just to make sure it's running true in the collet. I also do whatever back-cutting I've decided on at the same time, just to make 100% sure the angles are concentric.
    If God is your co-pilot, change seats!
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    Senior Member wagspe208's Avatar
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    I have a centerless grinder, so the tip "should" be square to the stem. A simple stop on the tip, a spring clamp deal to hold the valve stem down (not necessary, as I have a thumb), but faster, and an indcator. With e-bay being what it is.. I figure 50 to 100 bucks.
    Wags

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    steelcomp was here
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    Quote Originally Posted by wagspe208 View Post
    I have a centerless grinder, so the tip "should" be square to the stem. A simple stop on the tip, a spring clamp deal to hold the valve stem down (not necessary, as I have a thumb), but faster, and an indcator. With e-bay being what it is.. I figure 50 to 100 bucks.
    Wags
    Tip should be square, and if there's a bevel it needs to be perfectly concentric. Seen too many times where it wasn't, and that'll screw with ya for sure.
    If God is your co-pilot, change seats!
    Acts 2:38, the perfect answer to the perfect question.

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    i'm back!! 1QuickCP's Avatar
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    Yup, always, I had one dedicated machine for race valves only, best thing I ever found for accuracy Lacey M. Williams Equipment Co. - Phillipsburg, NJ - installed it in a kwik way, uses the swiss collets. Yeah it takes time but produces a PERFECT face every time. Just a very good product. Grind a 2.4 titanium valve, runout is zero to .0005 every time. When I sold my shop that machine went with me...lol...

  11. #9
    Senior Member rampgirlll's Avatar
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    Default You tube video on Concentricity

    Wags- there is actually a youtube video for this....type in Concentricity in the search box.

    There is a you tube video for everything!
    Wwwwwwwwwweeeeeeeeeeeeeeeeeeeeeeeeeeeeeeeeeeeeeeee eee

  12. #10
    Bostick Racing Engines six-oh-nine's Avatar
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    Quote Originally Posted by steelcomp View Post
    That's absurd. I've gotten to where I just automatically face new valves. My old machine isn't perfect, but it seems to be better than most valves are.
    x2

    One thing to remember... no matter how high end of a valve one buys... they are still done on a production basis and could stand to have some hand lovin' detail... even a well mantianed older machine can still produce a better finish and maintain better concentricity than something produced in mass quantity. Even on stockers... new valves get at least touched up before going into the head... I mean good valve seal makes all the difference... and is always overlooked with production and/or "lower end" builder/machine shops. IMO
    The Bostick®

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    steelcomp was here
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    Quote Originally Posted by six-oh-nine View Post
    x2

    One thing to remember... no matter how high end of a valve one buys... they are still done on a production basis and could stand to have some hand lovin' detail... even a well mantianed older machine can still produce a better finish and maintain better concentricity than something produced in mass quantity. Even on stockers... new valves get at least touched up before going into the head... I mean good valve seal makes all the difference... and is always overlooked with production and/or "lower end" builder/machine shops. IMO
    Good seal, and concentricity also helps keep the stem off the guide, believe it nor not.
    If God is your co-pilot, change seats!
    Acts 2:38, the perfect answer to the perfect question.

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    Bostick Racing Engines six-oh-nine's Avatar
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    Quote Originally Posted by steelcomp View Post
    Good seal, and concentricity also helps keep the stem off the guide, believe it nor not.
    You mean the valve is not supposed to bounce around in the guide trying to seat when it closes?

    The hack/lazyman way of making a piss poor valve job work... make the guides loose as hell. I still gets me when people bring in stuff and say "it didn't leak when I poured solvent in the port, so I htink the valve job should be ok." Yeah... with 4 thou guide clearance you could use a rock and a drill motor to grind your valves and seats and they'll seal.
    Last edited by six-oh-nine; 07-25-2011 at 12:04 PM.
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    Senior Member EVILFORCE's Avatar
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    I have always ground the valve and then looked at it. If it is not right your edge will be sharp on one side and thick on the other. But I am from Oklahoma.
    No Fool Like A Old Fool is there?

  16. #14
    Bostick Racing Engines six-oh-nine's Avatar
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    Quote Originally Posted by EVILFORCE View Post
    But I am from Oklahoma.

    It's ok... won't hold it against ya, not everyone can be from California.
    The Bostick®

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