5.3 truck engine converted to 5.7 LS1

Discussion in 'High Tech Retrofits' started by ctchap70, Jul 24, 2011.

  1. ctchap70

    ctchap70 Veteran Member Lifetime Gold Member

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    Anyone know what is involved? Anyone on here done it?
     
  2. onelapduster

    onelapduster Veteran Member

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    Your better off from what I have read is starting with the 5.7 if that is what you want. Otherwise the 5.3 can be made to make just as much power.
     
  3. Todd80Z28

    Todd80Z28 Moderator Staff Member Lifetime Gold Member

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    The difference is the bore. They share the same stroke. I'm not sure if you can bore out a 5.3 block that far... maybe?

    I suppose the better question is- with the availability of all the other LSx stuff out there, why bother?
     
  4. ctchap70

    ctchap70 Veteran Member Lifetime Gold Member

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    See what I thought about was using the motor an trans from my 05 silverado after it gets paid off not too long from now. Just a thought.
     
  5. Pfrederiksen

    Pfrederiksen Veteran Member

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    Sure you can. You end up with an iron block LS 1.
    Pretty cool.

    P
     
  6. ProStreet383

    ProStreet383 Veteran Member

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    And then do what with the truck? Seems silly to me when you can find a good 6.0 out of a wrecked truck and the 6.0 is a much better engine than the 5.3 or 5.7 lsx.
     
  7. ctchap70

    ctchap70 Veteran Member Lifetime Gold Member

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    Well it's like this, my truck has 105k miles on it. It had 27k on it when I started using royal purple an k&n filters. So I know I got a good engine an trans, computer & all accessaries. The truck has a lemon title, though I've not had a lick of trouble wit it. Some minor body damage, yup a deer, so I don't know how much I could sell it for. I got the 5.3 to 5.7 from a car craft article a couple mths ago. But they didn't get detailed in the conversion and had plenty of parts at their disposal. So anybody done this on here before? Thanks again, Charlton.
     
  8. rajent

    rajent New Member

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    5.3 to 5.7 ls1

    there is a book titled "how to build high performance chevy ls1/ls6 v-8s"
    by Will Handzel that explaines this in great detail including GM part numbers for
    needed parts.The 5.3 cast iron block needs to be bored to 99 mm.but the block
    should have enough "meat"to allow machining that far.
     
  9. ctchap70

    ctchap70 Veteran Member Lifetime Gold Member

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    Thanks. Think I'll look it up. Charlton.
     
  10. 77nomad

    77nomad Veteran Member

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    This months issue of HotRod has a interesting 5.3. Twin turbo. Stock bottom end. 1200hp. The pulled it apart and found out it was a 4.7, so they say.
     

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