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valves? oversized

Discussion in 'Engine Building' started by jits1980, Aug 9, 2007.

  1. jits1980

    jits1980 New Member

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    Jul 27, 2007
    hey guys im building a ls/vtec w/ a 92 integra and a 95 gsr head. i need new valves and i was wondering what the effect would be if i got .5mm oversized valves? what would i have to get done? i am trying to keep it stock as possible. my buddy has these valves and i could get them cheap. let me know what i should do? should i get these or get the flat faced standard size?
  2. welfare

    welfare Ancient Member

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    Apr 19, 2004
    New York
    putting in the oversized valves requires the valve seats to be re-ground in order to fit them, unless it's the valve stem that is oversized (for what reason I wouldn't know) and then you would need the valve guide re-sized.
    either way it would cost some money to do it, and you would only really benefit from the re-size if you got the head ported and polished.
    Either way I would stick with the stock size for ease of installation and if you go with the flat faced valves you will get a little compression bump as well.
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