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Thread: It's Time to SUPERSIZE Moby - MoTech 6.2L LS Jeep Motor Swap

  1. #1
    Administrator CarsonCindy's Avatar
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    It's Time to SUPERSIZE Moby - MoTech 6.2L LS Jeep Motor Swap

    mobydesertsun.jpg

    Yup, you guessed it.... the time has finally come to give Moby a little boost in power! We weren't planning on it but, with all the headaches we've been having with our transmission, we decided to stop throwing money at it, take the plunge and do a motor swap... but not a HEMI. After a lot of research, we decided to go with an GM LS 6.2L V8 (L94) and 6L80 automatic transmission using the MoTech LS kit with a heavy duty radiator. We hope to run this with a 3:1 Atlas 2-speed and brand new Dynatrac ProRock 80 rear axle to soak up all the additional power. This thread has been started to document the process of our Jeep JK Wrangler LS swap and we hope that you'll enjoy the build.

    supersize-moby-supporters.jpg

    THE PLAN:
    • LS 6.2L V8 (L94)
    • 6L80 6-Speed Automatic Transmission
    • MoTech LS Basic Kit
    • Heavy Duty Radiator
    • Advance Adapters 3:1 Atlas 2-speed Transfer Case
    • Dynatrac ProRock 80 Rear Axle
    • ATX Slab Bead Lock Wheels
    • NITTO 40x13.50 K-Spec Trail Grapplers


    LS SWAP UPDATES:

    THE PROCESS:


    THE PARTS:


    THE COST:
    (so far - not including tax or shipping)



    VIDEOS:

    Let the SUPERSIZING Begin : Short Timelapse Video of Moby's LS Swap



    Just for fun, here are the listed horsepower and torque numbers for a stock Jeep JK Wrangler 3.8L V6 and 3.6L V6 Pentastar motor compared to a 6.2L V8 motor:

    Jeep JK Wrangler - 3.8L V6
    205 hp @ 5,200 rpm
    240 ft-lbs. @ 4,000 rpm

    Jeep JK Wrangler - 3.6L V6
    285 hp @ 6400 rpm
    260 ft-lbs. @ 4800 rpm

    GM Vortec L94 - 6.2L V8
    403 hp @ 5700 rpm
    417 lb-ft @ 4300 rpm


    Time to Start Shopping
    First on our list was to find a used LS engine/transmission from a 2007+ Silverado, Yukon or Escalade. From what we were told, it would also have to be from a truck/SUV that was a 4WD. After doing some searching, we finally found what we were looking for, a 2011 Yukon Denali 4WD 6.2L motor and transmission and if you can believe it, it only had 12,000 miles on it! Here are a few pics of it at the junkyard we found it at:





    After checking it out, we agreed it was too good to pass up and so, we went ahead and bought it. As you can see, it is now sitting at Off Road Evolution with Moby just waiting for more parts to show up!














    We've got more parts on order and will be posting them up as they come in. Be sure to check back for updates

  2. #2
    Caught the Bug TRAMjam's Avatar
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    It's Time to SUPERSIZE Moby!

    Amazing! Can't wait to see the rest of the build!

  3. #3
    Nothing but a Thing bdmckenna's Avatar
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    So this upgrade begs to ask this question... What are you all doing with the ProRock 60 currently under Moby?
    Brian McKenna
    Belfair, WA
    2012 White JKRU w/Bells & Whistles

    Yeah... I wheel. Nuff said.

  4. #4
    Nothing but a Thing munstie's Avatar
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    Re: It's Time to SUPERSIZE Moby!

    Awesome that is all:thumbup:

    2011 JKU 3.5 R.E. Longarm lift.

  5. #5
    Old Timer Skid_Kid's Avatar
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    Awesome! Two questions, cause Eddie has said wheeling with an auto is like cheating, so why go with an auto? Or is a manual not an option?
    SEMPER FIDELIS!


    2013 Black JKUR
    Zac Brown of the PNW

  6. #6
    Looking forward to the RE-build.

  7. #7
    Old Timer ttfhell's Avatar
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    It's Time to SUPERSIZE Moby!

    That's awesome! Except now I have engine envy on top of everything else.


    Sent from my iPhone using WAYALIFE mobile app

  8. #8
    Knows a Thing or Two Topper's Avatar
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    It's Time to SUPERSIZE Moby!

    Awesome cant wait to see Moby come back to life it's been to far to long with out him.

  9. #9
    Administrator CarsonCindy's Avatar
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    Quote Originally Posted by bdmckenna View Post
    So this upgrade begs to ask this question... What are you all doing with the ProRock 60 currently under Moby?
    RubiCAT will be getting an upgrade

  10. #10
    Administrator wayoflife's Avatar
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    Quote Originally Posted by Skid_Kid View Post
    Awesome! Two questions, cause Eddie has said wheeling with an auto is like cheating, so why go with an auto? Or is a manual not an option?
    A manual was an option but one we decided against - more because we would really start to break stuff than anything but, also because wheeling on really hard terrain in an auto is just so much easier.

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