LS swap 5.3 or 6.0 ?

Discussion in 'High Tech Retrofits' started by stroked383, Dec 6, 2012.

  1. camarochevy1970

    camarochevy1970 Veteran Member

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    Stroked, just so you are aware, the aluminum block is good for something like 1000 hp. The stock connecting rod bolts are the weak link, and then the crank, which is good for like 700 or something.
     
  2. Aceshigh

    Aceshigh Veteran Member Lifetime Gold Member

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    Because it's not the same price. ;)

    5.3L's can be had complete for ~$800-$1000 on average.
    The rest cost more. Especially LY6 6.0L's with the L92 heads are on average ~$2,000-$2500.

    Not all 6.0L's are worth it. This one definitely is. . 
    You're getting a FAR BETTER head and more displacement on the 6.0L LY6.
    320cfm (L92 head) vs 226 cfm (5.3L head) nearly a 50% increase in potential.
    http://www.smokemup.com/tech/ls1.php
    Agreed. Same here.

    It's only ~$1,000 difference between an LY6 6.0L and a 5.3L
    If you can afford a 5.3L , just wait to save another $1,000.....it's not that much.

    Cam swap away from ~480 SAE net hp.
     
    Last edited: Dec 7, 2012
  3. Thunderkyss

    Thunderkyss Veteran Member

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    I've got an 5.3L in my truck. It's very nice. I want to say I love it. It's very smooth, plenty of torque, plenty of power. I would have absolutely no issue putting it in a 2nd gen. I may not be able to get the power I can out of a 6.0L but do we really need to max out the power? I'm not going to the track, I'm not going to street race a bunch of kids. All I want is a bad ass ride & I can put 327 badges on my Camaro with a 5.3L (may be fudging a little).

    I had an LS2 in my Vette. Cammed, heads, stalled. Really didn't enjoy driving it as much as you'd think. The lope was cool, the looks I got, thumbs up & all that, cool. Couldn't keep the tires from spinning. More power than I needed, the engine wasn't really built for driving. It was great on the highway, but stop light to stop light, regular city driving... eh...

    If I were going to build a 6.0L for my '72 it wouldn't be as radical as the one that was in my Vette. It would not be built for max power. If I'm not going for max power, why not save some cash & build the 5.3L ?
     
  4. camarochevy1970

    camarochevy1970 Veteran Member

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    Only reason I can really suggest would be the following scenario

    So not building for max power, but let's say you want 450 rwhp out of your LS swap car. I can make a 6.0 put down 450 rwhp in a way less radical config then I could a 5.3, as the better heads and larger displacement give me a better base to build off of.

    That is the way I have always approached it, it takes a less radical combination to get to the power level I want, if I start with a larger amount of displacement.

    That said, the 5.3 is certainly nothing to complain about. They make good power and torque, and take a significant amount of abuse, and as stated, can be picked up for cheap.
     
  5. Aceshigh

    Aceshigh Veteran Member Lifetime Gold Member

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    It's right there, close enough IMHO.
    I call them 327's too.

    I think they're awesome engines and great for a DD Camaro.
    I put my GTO LS1 into my 2nd gen and I've had zero desire to upgrade it.
    It's got enough oomph for me to enjoy on the rare occasions I do take it out. LOL

    It will never be as fast as my Busa, and it costs waaaay more to upgrade.
     
  6. BonzoHansen

    BonzoHansen Administrator Lifetime Gold Member

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    On a 79 Camaro? No!
     
  7. 70 gsconvt

    70 gsconvt Veteran Member

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    I don't know where you're buying your engines, but you can get a running LY6 on carpart.com for $1500 all day long. And the only difference between the LQ4 and LY6 are the heads. L92-style heads vs the 317-style on the LQ4/LQ9 engines. And as said earlier, there is a 6.0L all aluminum engine. That would be an LS2. You can find them not only in corvettes, but also Saab 97X's and Trailblazer SS's.
     
    Last edited: Dec 7, 2012
  8. camarochevy1970

    camarochevy1970 Veteran Member

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    you can find an ls2 in the following:

    2005–2006 Pontiac GTO
    2005–2006 Chevrolet SSR
    2005–2007 Chevrolet Corvette
    2005–2006 Holden Special Vehicles Clubsport (Z Series)
    2005–2006 Holden Special Vehicles Senator (Z Series)
    2005–2006 Holden Special Vehicles Coupé4 AWD (Z Series)
    2005–2006 Holden Special Vehicles Avalanche XUV AWD (Z Series)
    2005–2006 Holden Special Vehicles SV6000 (Z Series)
    2005–2006 Holden Special Vehicles Maloo (Z Series)
    2005–2006 Holden Special Vehicles Coupé GTO (Z Series)
    2005–2006 Vauxhall Monaro VXR
    2005–2008 Holden Special Vehicles Clubsport R8 (Z Series, E Series)
    2005–2008 Holden Special Vehicles Grange (Z Series, E Series)
    2005–2008 Holden Special Vehicles Maloo R8 (Z Series, E Series)
    2006–2009 Chevrolet TrailBlazer SS
    2008–2009 Saab 9-7X Aero
    2006–2007 Cadillac CTS V-Series

    And an L76 (ls2 bottom, l92 top end) in a G8 GT
     
  9. BonzoHansen

    BonzoHansen Administrator Lifetime Gold Member

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  10. SMCZ28

    SMCZ28 Veteran Member

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    5.3L can be bored out to the same size of an LS1 but it can't go any bigger than that. On ebay there was/is a guy selling 5.3L virgin blocks for 150 a piece and whatever freight would be. I had a comparison of all the LS engines and why they are different. The LS3 is better than the LS1 because the heads were kind of redone with the port which gives more power. Also the LS3 being a 6.2L and a few other things.

    http://www.lsxtv.com/tech-stories/engine/ls1-lsa-lsx-what-is-the-difference/
     
    Last edited: Dec 7, 2012

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