Old school SBC/BBC to LS family comparo.

Discussion in 'High Tech Retrofits' started by newschool72, Sep 23, 2013.

  1. newschool72

    newschool72 Veteran Member

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    There have been several friendly arguments on SBC/LT1/BBC vrs LS on this forum over the years. I was digging through some older issues of HotRod while on the throne the other day and came across the crate motor shootout. I started comparing old vrs new on GMs crate engines. It is a real eye opener for sure!
    Lets compare what I think would be equal old school vrs new stuff.

    Battle 1. LS327 ( truck 5.3 w carb) vrs the standard of crates ZZ4 350. LS327 12.35 at 105, ZZ4 12.44 at 105. 323cid vrs 350cid. smaller LS wins.

    Battle 2. LS3 ( factory stock vette/Camaro ) vrs ZZ383 stroker. LS3 11.33 at 114, ZZ383 11.70 at 111. Smaller 376cid LS wins over larger 383 SBC.

    Battle 3. LS7 ( factory ZO6 vette) vrs ZZ427 BBC. LS7 10.78 at 120 , ZZ427 11.35 at 115. Same cubes, but a pure thrashing by the LS.

    Battle 4. LSX454 (Not a factory style crate, this motor was tired after 100s of dyno pulls and a long haul power tour) vrs zz572/720R ( not intended for street use, 12 to 1 CR) LSX 454 10.75 at 120, ZZ572 10.21 at 128. No contest, proving that no matter how you look at it there is no replacement for displacement in an NA app.

    If you dig a little deeper ,you will see that the little LS3 even takes the ZZ427 BBC, although by a very small margin. The test car was a 69 Chevelle and all combos were setup with optimal 1/4 mile gearing and stall converters for the engines power curve.
    None of this thread is intended to create a fight, just to show how technology has given us gear heads some pretty impressive power plants to take our hotrods to the next level and keeping OE level drivability ( if you can stand to leave well enough alone, LOL ). Enjoy!!
     
    Last edited: Sep 23, 2013
  2. 5spd540

    5spd540 Veteran Member Lifetime Gold Member

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    I was going to put a LS in my car until I found out how much it was going to cost. A LS would be 15 to 20 grand and is not out of the question for a 700hp LS motor
     
  3. newschool72

    newschool72 Veteran Member

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    You can get into an LS for chump change, unless you are looking for the best of everything. I just came back over here from LS1tech Carbed LSX forum and a guy is running a bone stock 6.0 short block w a custom cam, stock heads, a carb and is running 6.60s on motor, 6.0s on a 100 shot in the 1/8th. He has the truck motor in a light fox body mustang, but still very impressive and dirt cheap to put together. The only thing to keep someone from an LS swap is nostalgia or fear of doing something new, period.
     
  4. TheMeat

    TheMeat Veteran Member

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    It was a toss up for me too after considering the cost of everything. But I wanted Fuel injection, overdrive, and something that would be worth the money I put into it.

    Example; If you were to take 2 identical 1973 Camaro's but equip one with a 383 SBC and the other with a LS1, I bet the Ls equipped car would have a higher market value and be more desirable to a larger group. That was one of the tie breakers for me.
     
  5. PolarBear

    PolarBear Veteran Member Lifetime Gold Member

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    I am probably at around $5,000 with my swap
     
  6. 351maverick

    351maverick full time Ebay seller/hustler/car killer

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    F LSX motors
     
  7. 5spd540

    5spd540 Veteran Member Lifetime Gold Member

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    I know the LS are good motors but if you want a 700hp motor you better own a good bank
     
  8. 5spd540

    5spd540 Veteran Member Lifetime Gold Member

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    Oh and BTW I do have a project I am going to be starting soon with a LS1 and a T-56. I am not sbc,Ls,or BBC only I like them all in the right car
     
  9. 351maverick

    351maverick full time Ebay seller/hustler/car killer

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    ^^THIS^^

    the way I see it - if you want a LS motor then drive a 4th gen Camaro, or 98+ vette...leave the classic cars alone
     
  10. ryeguy2006a

    ryeguy2006a Veteran Member

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    I have a net of about $2500 into my swap right now, but I also started with a donor car that I sold a bunch of parts to make some money back. If you shop around you can find a good deal on a wrecked fbody LS1/6speed and it makes the swap much easier due to having most all the parts you need.
     

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