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lsx 383 engine build advice

This is a discussion on lsx 383 engine build advice within the Internal Engine forums, part of the LSx Technical Help Section category; Use LS3 heads with the Sodium valves or L92 heads with the solid valves, they are easily flowing 350cfm at ...

  1. #21
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    LS3 HEADS or L92 HEADS

    Use LS3 heads with the Sodium valves or L92 heads with the solid valves, they are easily flowing 350cfm at .600 lift with stage 2 porting. These heads cost about half of what good after-market heads cost. .575 to .600 lift cam, 230 duration and 114 lobe separation makes for an easy driving killer without spending $6k.

  2. #22
    King 0f n00bz shady milkman's Avatar
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    blacker than wesleysnipes
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    Quote Originally Posted by spordee1 View Post
    Use LS3 heads with the Sodium valves or L92 heads with the solid valves, they are easily flowing 350cfm at .600 lift with stage 2 porting. These heads cost about half of what good after-market heads cost. .575 to .600 lift cam, 230 duration and 114 lobe separation makes for an easy driving killer without spending $6k.
    i herd cam makers are just starting to learn what those heads like in terms of cam specs...

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    Ls3 heads

    You are correct on the cam size for the LS3 Heads milkman. All references to the cam size to match these heads are usually modest. One builder referenced 650 hp with approx. .625 lift. and 112 lobe. another 600hp with
    .600 lift and 114 lobe, but most were at 550hp with a .575 lift and 114 lobe.
    But most of the DD's were about .575 lift and 114 lobe.

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