4bt cummins jeep build log
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  1. #1
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    4bt cummins jeep build log

    I have been in the process of building a 3.9l 4bt cummins to transplant into a 2000 jeep tj sport

    Engine build specs
    -std pistons with ceramic coated crown
    -acd stage 1 cam
    -head completely rebuilt with new valve seats, guides, and new valves
    -all new bearings from acd
    -acd fuel pin and 3200 rpm gov spring in the ve pump
    -he341 also known as hy35d turbo from a 2004 5.9 cummins with a 9 cm exhaust housing
    -5.9 exhaust manifold cut down to fit the 4bt and ports reshaped
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  2. #2
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    Re: 4bt cummins jeep build log

    More views of the project
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  3. #3
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    Re: 4bt cummins jeep build log

    Few more shots
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  4. #4
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    Re: 4bt cummins jeep build log

    Here is are some more angles and a shot of the 2004 common rail cummins I put in my 1999 f250 in 2011
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    Last edited by jbr; 05-17-2015 at 06:23 PM.
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  5. #5
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    Re: 4bt cummins jeep build log

    Here is a shot if when I was working on porting the head
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  6. #6
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    Re: 4bt cummins jeep build log

    Been working on the bell housing, it had to be modified to clear the shifter boss on the nv3550
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  7. #7
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    Re: 4bt cummins jeep build log

    Wrapped the exhaust manifold with titanium wrap
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  8. #8
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    Re: 4bt cummins jeep build log

    Started working on the turbo piping
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  9. #9
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    Re: 4bt cummins jeep build log

    Interesting build, looking good so far.
    Is that poor little jeep going to be able to hold that 750lb motor?
    Welding/Fab Pics: www.UtahWeld.com

  10. #10
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    Re: 4bt cummins jeep build log

    Quote Originally Posted by MikeGyver View Post
    Interesting build, looking good so far.
    Is that poor little jeep going to be able to hold that 750lb motor?
    Thanks, to get the 3" of lift I need I think I will have to put 5.5" lift springs in but I will have to spend a little more time researching and doing the math, I plan on strengthening the frame in certain areas as well, if anyone has ideas please post them up
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  11. #11
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    Re: 4bt cummins jeep build log

    Built a mout for my tubing notcher
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  12. #12
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    Re: 4bt cummins jeep build log

    Cut apart a intake elbow from a 24v cummins and will tig weld it back to be used in my configuration
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  13. #13
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    Re: 4bt cummins jeep build log

    Welded the cast aluminum intake back together
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  14. #14
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    Re: 4bt cummins jeep build log

    All done
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  15. #15
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    Re: 4bt cummins jeep build log

    Test fit the modified elbow
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  16. #16
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    Re: 4bt cummins jeep build log

    The intercooler also came in
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  17. #17
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    Re: 4bt cummins jeep build log

    Downpipe flange is welded on
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  18. #18
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    Re: 4bt cummins jeep build log

    Starter clears
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  19. #19
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    Re: 4bt cummins jeep build log

    Here is a link to the turbo mount I built

    http://forum.longevity-inc.com/showt...in-turbo-mount
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  20. #20
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    Re: 4bt cummins jeep build log

    Trying to find the right spot for the intercooler
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  21. #21
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    Re: 4bt cummins jeep build log

    Version 2.0 of the turbo set up
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  22. #22
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    Re: 4bt cummins jeep build log

    Started building the alternator mount
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  23. #23
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    Re: 4bt cummins jeep build log

    Started mocking up the air con compressor
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  24. #24
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    Re: 4bt cummins jeep build log

    Very nice build... Now this is going into a jeep? Lol my goodness this is going to be a tight squeeze!! The weight on the front end... what type of Axles are you going to be running? I would suggest something on the lines of a Dana w/ 4.10 gears. Your putting a 5.5 lift on the front and rear correct? Is it going to be coil over springs? Do you know the Gross weight on that engine after its all said and done with your add-ons? You will have to cut your hood and put a very large Cowl on there. with real air intakes. I am sure you have measured your clearance?
    Last edited by AndrewDavenport89; 06-11-2015 at 02:25 PM.

  25. #25
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    Re: 4bt cummins jeep build log

    Quote Originally Posted by jbr View Post
    Thanks, to get the 3" of lift I need I think I will have to put 5.5" lift springs in but I will have to spend a little more time researching and doing the math, I plan on strengthening the frame in certain areas as well, if anyone has ideas please post them up
    You don't want taller soft springs, you want the correct height spring in a stiffer spring rate. Old Man Emu and a few other companies sell different spring rates for heavy bumpers etc. Its about a 300lbs difference to a stock 4.0L

    Lots of info in this thread on different brands and spring rates

    http://www.jeepforum.com/forum/f11/s...-rates-613756/

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