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5.3 to DOD LS4 Swap

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Old Aug 5, 2009 | 03:58 PM
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Default 5.3 to DOD LS4 Swap
What do you guys think???


https://ls1tech.com/forums/conversio...questions.html
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Old Aug 5, 2009 | 04:32 PM
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Originally Posted by Bryan921SS
What do you guys think???

Doubt it will work since there is no starter mount on the LS4 block. Plus the LSX engines and the Vortec engines share little parts.
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Old Aug 6, 2009 | 01:33 PM
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Originally Posted by LS4SPEED
...Plus the LSX engines and the Vortec engines share little parts.
I don't think you meant this part, did you? LSX and Vortec are just different names for the same Gen III/Gen IV architecture. Most parts will interchange.
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Old Aug 6, 2009 | 01:34 PM
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Nah, I ment LS4 must a fat fingered it. Meaning front end arrangment and intake oh and starter mounting.....
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Old Aug 6, 2009 | 01:37 PM
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Originally Posted by LS4SPEED
Nah, I ment LS4 must a fat fingered it.


I figured you meant something different!
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Old Aug 6, 2009 | 01:41 PM
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I'm not sure of the internals between the LS4 engine and the Vortec engine. I think and could be wrong but are completely different engines? I didn't think LS heads would fit on a Vortec engine?
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Old Aug 6, 2009 | 05:10 PM
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Originally Posted by LS4SPEED
I'm not sure of the internals between the LS4 engine and the Vortec engine. I think and could be wrong but are completely different engines? I didn't think LS heads would fit on a Vortec engine?
Other than the crankshaft, the internals are interchangeable...though there are differences between DoD and non-Dod parts.

The heads will bolt to any Vortec, as they're simply the LS6 heads designed for the 2001-2004 Z06 Vette. While Vortec/LSX heads may interchange, the different chamber sizes may preclude their usage in some combinations, however, this is just like any older small block Chevy.
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Old Aug 6, 2009 | 05:24 PM
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Originally Posted by LS1 Racing
Other than the crankshaft, the internals are interchangeable...though there are differences between DoD and non-Dod parts.

The heads will bolt to any Vortec, as they're simply the LS6 heads designed for the 2001-2004 Z06 Vette. While Vortec/LSX heads may interchange, the different chamber sizes may preclude their usage in some combinations, however, this is just like any older small block Chevy.
Well ya just learned me somethin!
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Old Aug 6, 2009 | 05:31 PM
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Originally Posted by LS4SPEED
Well ya just learned me somethin!
Glad I could help! I've been tinkering with Gen III (and Gen IV) motors since 2000 and have probably owned half-a-dozen vehicles powered them. There's a ton of info out there and it's easy to get overwhelmed.

I am convinced that these engines are God's gift to the performance enthusiasts!
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