How To: Build your own 4.0L turbo Cummins (Beware...170+ pics)

[kastein]

Sounds like how I am supposed to start the M54A2... crank it over a few times with the fuel cutoff pulled to check for hydrolock + get some oil flowing, then push the fuel cutoff back in and crank again if all is well.

I love the noise it makes running full bore with a straight stack... 465ci, 22:1 compression ratio, and a huge turbo. Came from the military with no muffler and that's the way it is staying.

 

[cm12385]

What part number of FIC from AEM did you use? I am contemplating this on a 1994 Cherokee, so I need to find something to tune with that is OBD-I compatible. Also, where did you get the turbo from?

 

[XJCasper]

If duplicating this build, would it also be safe to mount a Transmission cooler in front of the Radiator? With the B&M head exchanger, would it create any conflicts with the air flow to the radiator?

 

[Boostwerks.com]

If duplicating this build, would it also be safe to mount a Transmission cooler in front of the Radiator? With the B&M head exchanger, would it create any conflicts with the air flow to the radiator?

I have a trans cooler as well (highly reccomend it). As long as the cores are high quality like the B&M you will be fine. Even in 90deg weather cruising up I70 in the mountains I didn't have any overheating issues. As long as all related cooling components are in good shape you shouldn't have a problem (radiator, water pump, clean/clog free system).

BTW, sent ya PM Jason.

 

[XJCasper]

Just to keep this question going, in case anyone else ever wants to ask...

So, you also have the B&M cooler for the transmission?

 

[Boostwerks.com]

The trans cooler for the transmission is some other brand (can't remember who) but the core has a similar cross flow design that B&M uses. The Cooler for the intercooler is a B&M however.

An external trans cooler is a good idea for any auto Jeep IMO.

 

[Metzroth]

Amazing fab work. Would love to see dyno numbers but I completely understand how things are when money is tight. Congrats on getting married (a little late). It's a big step I'm getting closer and closer to making myself...scary to admit that.

Anyway, maybe I'll be getting in contact with you in a few years when I'm out of school and ready to invest some more money in the XJ.

Thanks for taking the time to take all of the build pictures and describe why you did things the way you did.

If only I liked math, I would try to make a living out of designing and fabricating parts. (I.E. I would have majored in mechanical engineering or looked into grad school for Engineering)

Again, thanks for the hard work and it looks amazing. I'm jealous. :worship:

 

[Jeep98cherokee]

what was your target? Or what afr are you running now?

 

[Jeep98cherokee]

what was your target afr Or what afr are you running now?

 

[Boostwerks.com]

Target AFR is 12:1 under boost.

I'll have some updates soon. Here's a teaser...

 

[CherBear]

Your fab work is incredible.

 

[Boostwerks.com]

Your fab work is incredible.

I'm honestly far from the best out there, but I'm slowly learning. As soon as you think your the best, you admit defeat. :cheers:

 

[GrimmJeeper]

As soon as you think your the best, you admit defeat. :cheers:

My grandfather told me "as soon as you think you know everything, you stop learning and fall behind". Kind of along the same lines.

Nice welds though, as always

 

[gradon]

dime pieces

 

[project continues]

WOW THATS SOME VERY CLEAN WORK AND LOT OF HEAD SCRATCHIN ON THE INSIDE OF THE SKULLBONE Now for the question of how can i get 1 of those for my mj/xj/zj and still keep the wife on at least speaking terms

 

[CherBear]

WOW THATS SOME VERY CLEAN WORK AND LOT OF HEAD SCRATCHIN ON THE INSIDE OF THE SKULLBONE Now for the question of how can i get 1 of those for my mj/xj/zj and still keep the wife on at least speaking terms

There is only one answer for that:

Dont tell her.

 

[Boostwerks.com]

Update! I put the finishing touches on the exhaust today so here are some pics.

I added a 3" Magnaflow Spun Cat, and extended the exhaust past the rear. Before I had it simply dumping out to the side of the leaf spring which resulted in carbon build up everywhere. I'm replacing the plugs in a few days and then heading over to try and pass emissions. party1: :bs:

I also had a 3/8" heim joint laying around which has a bronze impregnated bushing (good for high heat) so I decided I'd use it as the rear hanger. Turned out pretty sweet. Since the rear section is fixed I don't need a typical rubber hanger. The heim allows it to move, but still supports the weight. It sounds great and doesn't vibrate!

 

[XJCasper]

Looks good

 

[XJCasper]

WOW THATS SOME VERY CLEAN WORK AND LOT OF HEAD SCRATCHIN ON THE INSIDE OF THE SKULLBONE Now for the question of how can i get 1 of those for my mj/xj/zj and still keep the wife on at least speaking terms

Set-up allowances. Each of you get 10% of your income to spend any way you wish. Save it up. That is how I pay for my fun stuff, but can't yet afford the entire turbo set-up.

 

[Boostwerks.com]

Set-up allowances. Each of you get 10% of your income to spend any way you wish. Save it up. That is how I pay for my fun stuff, but can't yet afford the entire turbo set-up.

That's a good way to do it. Honestly my wife doesn't really care. I think as long as I don't bitch about how much she spends on cloths I'm in the clear. :kissyou: