think somone can tell me what the dome/cr. these pistons would be?
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think somone can tell me what the dome/cr. these pistons would be?

  1. #1
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    Default think somone can tell me what the dome/cr. these pistons would be?

    Found some sealed power forged, floating pin, 6.385" rod lenght pistons, but I bet the dome is too big.

    He said he doesn't know what the dome is, but they have to be used with open chamber heads.

    Any guesses??
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    can this be moved over to the on the dyno section? Oops.

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    Quote Originally Posted by PowerAddict View Post
    Found some sealed power forged, floating pin, 6.385" rod lenght pistons, but I bet the dome is too big.

    He said he doesn't know what the dome is, but they have to be used with open chamber heads.

    Any guesses??
    There should be a part number stamped in the top of the piston? Can't see it in the photos. How tall is the dome?

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    he said they were custom?

    He also said the dome is probably around 1/4" high.

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    Quote Originally Posted by PowerAddict View Post
    he said they were custom?

    He also said the dome is probably around 1/4" high.
    Don't think there is such a thing as a "custom" Sealed Power piston, must be something else? Anything on the underneath side. Looks a little like a KB above the top ring.

    Better find out for sure what they are for,, or measure the pin height for yourself so you don't buy them and find they don't work for you. For comparison sake, think you will find KB website shows dome height and volume if I recall. Might be this one with .290 dome height, 27 cc dome. http://www.kb-silvolite.com/icon/ico...tails&P_id=368

    That would put you roughly around 10.5-1 with 118 cc combustion chamber on a 4.310 bore

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    here is a pic of the bottom side, I'll talk to him more to try to find out the deal.

    what is the combustion chamber volume of 990 heads?
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  9. #7
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    I was wrong, they're wiseco pistons.

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    Default 990s

    Quote Originally Posted by PowerAddict View Post
    here is a pic of the bottom side, I'll talk to him more to try to find out the deal.

    what is the combustion chamber volume of 990 heads?
    All the 990s I've seen were 118cc from GM
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    well

    Is 10.5:1 cr too much for pump gas in your experience?

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