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Thread: What is the intake port size 2.5 ST?

  1. 05-25-2010, 12:52 AM #1
    preS
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    What is the intake port size 2.5 ST?

    Related to my question re. TB's used on a 2.5 ST (short stroke).

    What is the size of the intake port on the 2.5ST?

    - S / 36mm or was it OEM enlarged to for instance 38mm?

    Thanks again

    Richard
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  2. 05-27-2010, 08:07 AM #2
    kenikh
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    I have this info somewhere and will dig it up. The question is: what are you brewing up, John? I did loads of research for my 2.3L ST replica motor and have lots to share, if interested.
    Kenik
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  3. 05-27-2010, 11:05 AM #3
    letsrollbabe
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    Richard:

    The head ports were 41/41 mm, and the high butterfly stack TBs were also 41 mm. The best source for ST data is probably the 'Another Hotrod' thread by Flunder, but you may need to spend a little time finding the details you are after...as there are 30 pages of comments. It's time well spent though, if you are into STs.

    http://www.early911sregistry.org/for...t=23333&page=4

    Also, the Ultimate ST thread is another good source,

    http://www.early911sregistry.org/for...ltimate+thread
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