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Thread: 20r/22r build

  1. #1
    Member
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    Aug 2008
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    las vegas, NV
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    38

    20r/22r build

    hi all im building a 20r/22r motor for my celica. i understand what all is involved with putting the 20r head on the 22r block. what i don't now is what the compression will be. im using 9:1 22r pistons. can someone tell me what the compression will be with the 20r head?

  2. #2
    Member
    Join Date
    Aug 2008
    Location
    las vegas, NV
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    38
    never mind the 20r head i have held onto all this time turned out to be a old 22r head with a 20r sticker or valve cover on it. :td:

  3. #3
    Senior Member
    Join Date
    Feb 2009
    Location
    Northridge, CA
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    169
    20R has round intake ports, 22R has semi-rectangular ones. 20R has iron rocker arms, 22R has aluminum ones.

  4. #4
    Member
    Join Date
    Aug 2008
    Location
    las vegas, NV
    Posts
    38
    the 22r i have is equipped with iron rockers but lucked out and the head that turned out to be a 22r has the aluminum ones. i will be using them.

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