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15 degree heads?

This is a discussion on 15 degree heads? within the Internal Engine forums, part of the LSx Technical Help Section category; When someone says their LS1 has 15 degree heads VS the standard 23 degree small block head, what is it ...

  1. #1
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    15 degree heads?

    When someone says their LS1 has 15 degree heads VS the standard 23 degree small block head, what is it exactly that is 15 degrees? I have heard that it's the angle the intake valve is offset from the piston face. I have heard it is spark plug related. I have heard all kinds of stories. What is it?

    Thanks!

  2. #2
    Sonoma GT w/416 L92/T56 HotRodV6's Avatar
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    My best guess would be that the 15 degree refers to the valve angle in relation to the face of the piston.

  3. #3
    samdogmx
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    Quote Originally Posted by HotRodV6
    My best guess would be that the 15 degree refers to the valve angle in relation to the face of the piston.
    correct

  4. #4
    LS1 is the only one...
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    Yeah, valve angle to the center of the piston. Doesn't the LS7 have 12* heads...they're supposed to flow wicked!!

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