4bt cummins jeep build log

[jbr]

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

[jbr]

More views of the project

[jbr]

Few more shots

[jbr]

Here is are some more angles and a shot of the 2004 common rail cummins I put in my 1999 f250 in 2011

[jbr]

Here is a shot if when I was working on porting the head

[jbr]

Been working on the bell housing, it had to be modified to clear the shifter boss on the nv3550

[jbr]

Wrapped the exhaust manifold with titanium wrap

[jbr]

Started working on the turbo piping

[MikeGyver]

Interesting build, looking good so far.
Is that poor little jeep going to be able to hold that 750lb motor?

[jbr]

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

[jbr]

Built a mout for my tubing notcher

[jbr]

Cut apart a intake elbow from a 24v cummins and will tig weld it back to be used in my configuration

[jbr]

Welded the cast aluminum intake back together

[jbr]

All done

[jbr]

Test fit the modified elbow

[jbr]

The intercooler also came in

[jbr]

Downpipe flange is welded on

[jbr]

Starter clears

[jbr]

Here is a link to the turbo mount I built

http://forum.longevity-inc.com/showt...in-turbo-mount

[jbr]

Trying to find the right spot for the intercooler

[jbr]

Version 2.0 of the turbo set up

[jbr]

Started building the alternator mount

[jbr]

Started mocking up the air con compressor

[AndrewDavenport89]

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?

[MountaineerMetal]

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/