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LS1 Truck engine?

This is a discussion on LS1 Truck engine? within the External Engine forums, part of the LSx Technical Help Section category; Did GM make LS1 truck engine and if so is there a difference between the the Car LS1?...

  1. #1
    Junior Member g13ishop's Avatar
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    LS1 Truck engine?

    Did GM make LS1 truck engine and if so is there a difference between the the Car LS1?

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    Life in the Fast lane sunsetorangess's Avatar
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    Well they did put the Lsx block in the trucks, they were iron blocks and bigger bores, different intakes. the lm4 motor that came in some midsized trucks and ssr's are alum blocks.
    J
    2001 SS, Its not the car its the Driver that matters....

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    The Bandit Wesman's Avatar
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    Quote Originally Posted by g13ishop View Post
    Did GM make LS1 truck engine and if so is there a difference between the the Car LS1?
    They put LS based engines in the trucks, but never an actual LS1. They have different RPO codes, basically the differences are the intake manifold, cam (both designed for more low end in the truck), block is cast iron, and the displacements are different. Almost all parts are interchangeable though between the truck engines and the LS1.

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    A trained professional volleybill's Avatar
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    Yeah, you want the new Vortech engines, either 5.3 or 6.0- they have good specs stock, and the iron block (and I have been told, but haven't confirmed forged crank) are tough, take plenty of horse power- good place to start a build from-

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    Veteran Hi-Po's Avatar
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    LQ4 iron block here. Truck engine.
    370 CI - Twin 6766 Turbo - Jakes stage 5 4L80E - MWC 9" - Holley Dominator

    Build in progress...

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    Quote Originally Posted by Wesman View Post
    They put LS based engines in the trucks, but never an actual LS1. They have different RPO codes, basically the differences are the intake manifold, cam (both designed for more low end in the truck), block is cast iron, and the displacements are different. Almost all parts are interchangeable though between the truck engines and the LS1.
    whats not interchangeable between the truck engines and the LS1?

  7. #7
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    All the "LS" engines are either Gen-III or Gen-IV engines.

    They all have the same basic block design

    The "LS" motors are aluminum and range from 5.7 to 6.0L

    The truck engines were same basic Gen-III block design but were iron
    and came in 4.8, 5.3 and 6.0 sizes and were called the LM7 (5.3)
    and LQ4 and LQ9 both 6.0 motors.

    The heads, cams, intakes, oil pans, transmission, ect. ect. will all
    interchange from any Gen-III and Gen-IV engines ...... for the most part with some
    minor exceptions.

    The LQ9 from Escalades and Silverado is a popular engine to find.
    Its basically a 10-1 compression iron block LS2 with a milder truck cam.

    Tahoe's and 1500 trucks can install the '02 Z06 cam, some headers and a tune
    and pick-up 100rwhp

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    This is some good info cause I'm working on finding parts for my 5.3 Avalanche that I just picked up. It needs to haul some butt..

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    Quote Originally Posted by daddyzzs View Post
    This is some good info cause I'm working on finding parts for my 5.3 Avalanche that I just picked up. It needs to haul some butt..

    I'm in the process of putting a single front mount turbo on my '02 Tahoe.

    Leaving everything else bone stock on the engine.
    Run 13psi on a 62-1 turbo with intercooler.

    Should make over 500rwtq and 425-450+rwhp at 5,500 rpm.

    Total 5,000 lbs 13.00sec sleeper.

    "We Just Got Spanked by That ?!?!?"










    Getting close ..............

  10. #10
    Veteran Hi-Po's Avatar
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    ^^ you must have money growing out your ears to do that to a SUV.

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    Quote Originally Posted by Hi-Po View Post
    ^^ you must have money growing out your ears to do that to a SUV.

    Actually the build is incredibly simple. Total turbo parts cost is only about
    $2,300 .... not counting the built 4L60E trans.


    I built a custom twin 60mm turbo kit for my 5.8L '89 Mustang so I have the tools
    and know how to build it up in the driveway myself.

    Only thing being done to the engine is some 42lbs injectors, in-tank high press. 255 pump
    and some 6.0L Escalade coilpacks to beef up the spark.

    Tune it with HPTuners VMC suite and done. Should be a blast.
    The world needs more 550hp Tahoes

  12. #12
    Sold: LS1 '85 El Camino ls1camino's Avatar
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    Quote Originally Posted by rbarnes View Post
    All the "LS" engines are either Gen-III or Gen-IV engines.

    They all have the same basic block design

    The "LS" motors are aluminum and range from 5.7 to 6.0L

    The truck engines were same basic Gen-III block design but were iron
    and came in 4.8, 5.3 and 6.0 sizes and were called the LM7 (5.3)
    and LQ4 and LQ9 both 6.0 motors.

    The heads, cams, intakes, oil pans, transmission, ect. ect. will all
    interchange from any Gen-III and Gen-IV engines ...... for the most part with some
    minor exceptions.

    The LQ9 from Escalades and Silverado is a popular engine to find.
    Its basically a 10-1 compression iron block LS2 with a milder truck cam.

    Tahoe's and 1500 trucks can install the '02 Z06 cam, some headers and a tune
    and pick-up 100rwhp
    What about the LS3/9 and LS7 which are 6.2L and 7.0L, respectively?

  13. #13
    Veteran Hi-Po's Avatar
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    Quote Originally Posted by rbarnes View Post
    Actually the build is incredibly simple. Total turbo parts cost is only about
    $2,300 .... not counting the built 4L60E trans.


    I built a custom twin 60mm turbo kit for my 5.8L '89 Mustang so I have the tools
    and know how to build it up in the driveway myself.

    Only thing being done to the engine is some 42lbs injectors, in-tank high press. 255 pump
    and some 6.0L Escalade coilpacks to beef up the spark.

    Tune it with HPTuners VMC suite and done. Should be a blast.
    The world needs more 550hp Tahoes
    Sounds good then... You wont beat me in your SUV though!!! Maybe that stang...

  14. #14
    Veteran Hi-Po's Avatar
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    If it is what you say it is... that the maybe should be a probably.

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    Quote Originally Posted by Hi-Po View Post
    If it is what you say it is... that the maybe should be a probably.
    Been a long running project. Makes a little over 600rwhp at 10psi.
    Havent bumped it up to 15psi yet. Everything is built to hold 800rwhp.
    Everything from the turbos to the DIS ignition system running LS1 coil packs is "one off" custom.







    Quote Originally Posted by ls1camino View Post
    What about the LS3/9 and LS7 which are 6.2L and 7.0L, respectively?
    It was generalized remark.

    We could do a whole thread on the difference in the Gen-IV engines alone.

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    Dude that SUV will be nice when its done, not a big stang fan but it's well put together and looks like you droped some money on it.. Keep us updated on the tahoe turbo install I might need some pointers...

  17. #17
    Veteran Hi-Po's Avatar
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    Looks mean as hell, even for a little stang!

  18. #18
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    I grew up with the 5.0's so they always have a little place in my heart
    Paid a lot of attention to detail and as you can see tried to put something
    together unique. Taken about 2 years of constant tinkering.

    I'll start a thread on the Tahoe , give yall the low down.
    Going to go do a "stock" baseline dyno pull this week too, see what I really gain.


    Thanks all.

  19. #19
    Member WS6ICK2K's Avatar
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    I saw this on horse power TV lol. They are going to put the truck 2500 6.0 in the LS gun.

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