I have a '95 2.5l YJ and was looking to up the horsepower and torque of the engine.  I have been looking all over for a turbocharger but the only ones I have found are for the 4.0l's.  I have also been looking all over for what potential diesel engines I could drop in as is such as a 3.9l Cummins or one like the nissan engine used in the cj7 on one of the jp mag covers.  If anybody knows where to find either of these or both, I would be very, very grateful.  By the way, I live in the middle of nowhere and we have crappy junkyards with no useful parts...  

Here is a JPMag article on super charging the 2.5L.

Click here for more info.  

How about a supercharger?
http://www.avengersuperchargers.com/  

I kinda don't get all the big hype out of the 4bt, gees, it only has 325# and like 100hp, plus all the weight.

to make em economical to drive ya wind up with 3.55 gears and 35" tires, a stock 4.0 is far more capable with 5.13's and 35's off road and on the hwy.  

Well it doesn't necessarily have to be the 4BT.  I have just read a lot about it and it seemed like a good option.  I don't know of many other smaller diesels so I don't have a big list to choose from.  I kind of wanted to stay away from superchargers.  I appreciate you guys posting though.  I would much rather have a turbocharger.  If anyone else knows what I don't keep posting  

yeah, lots of guys have turbo's the 2.5 with various parts from other vehicles, one of the forum members has one. when I remember the screanname I'll post it, so ya can bug em... I've fooled around with alot of em also just never a 4 cyl.  

Haha, ok.  The problem is I don't know where to find a turbo for the engine.  If I could get one from another vehicle I don't know how I would know if it was compatible or not.  I want a turbo because it doesn't decrease gas mileage (like a supercharger) and might even increase it because I have to use the throttle less to achieve the same things (hopefully).  Do you know of any other good diesel engines that would work or a place that has info on it?  

o' yeah it will as much or more gass than the supercharger, just depends on how ya run the skinny pedal..

turbos operate from increased fuel to spool a super charger is belt driven and can put a constant bost at all times throughout the rpm range, the turbo is capable of making more power in the upper rpm ranges,

audi's and volvo have turbo systems that can be adapted to the jeep 2.5, ford has a super coupefrom the 80's with a charger, and the mustang turbos, also the dodge k cars, some had turbos that make great candidates for 2.5 jeep for cheap and a good bit of time. the smaller turbos spool faster making more low end faster with little to no lag, like they say size matters... in the wrong way.

check em out on e-bay for starters, theres usually tons of em listed, ya gotta do some research to find out what will work the best and easiest for installtion and maintenance.

I got a hold of a mitsubishi hd50 4cyl, (which would be a good swap if it were alot more dependable and not so hard to find) turbocharger with the intention of putting it on my 03 rubi 4.0, after regearing it seemed unnessary, though I still want to make it happen eventually.  

here's some pics,

2.5 volvo set up...



3.8 ford super coupe charger on a 2.5 jeep, runs 7psi with msd controler... the cost was about a grand and lots of trial and error.



 

If you want low end, right off idle, monsterous torque, that would be a supercharger.

Superchargers are more durable, and last 2 or 3 times longer than a turbo. They don't burn up and they don't need cooled down.

Twin turbos and variable nozzle turbos are the answer to the lag that does not exist with supercharging. The cost of these make the otherwise less costly turbo more expensive.

When your talking about a motor that is setup for low rpm torque and not high rpm horsepower, the supercharger is the only way to go.

How's that saying go... injection's nice, but I'd rather be blown...  

Haha, I see.  So they both cause gas mileage to decrease huh?  Oh well I guess.  I will have to check out the ones you all mentioned.  Still gotta figure out the diesel thing though.  This is where the net isn't as intuitive as it should be to find stuff like this, haha.  

yep, mostly depending on how ya drive...  

http://www.4btswaps.com/forum/forumdisplay.php?f=1

theres a link to some awesome turbo diesel info, took me a bit to find it, i got lost in a folder..  

sbartolic:
Haha, I see.  So they both cause gas mileage to decrease huh?  Oh well I guess.  I will have to check out the ones you all mentioned.  Still gotta figure out the diesel thing though.  This is where the net isn't as intuitive as it should be to find stuff like this, haha.

Fuel economy is a huge benefit of both turbos and superchargers.

They basically create a mulit-displacement engine.

Engines draw in an amount of air depending on the displacement. More displacement, more air. Less displacement, less air.

It is the amount of air that determines the hp potential of an engine.

Both turbos and superchargers bleed off the increased pressure if the throttle input doen't ask for it.

If there is less air, then there is less fuel required to meet the optimum air/fuel ratio for combustion.

So, a four cylinder's efficiency with out addional air, or V8 power because of increased air being forced into the four cylinder by the turbo or supercharger. Best of both world.  

Hey mudb8, I was wondering what diesel swaps you know of that would get good gas mileage and give decent hp and torque.  I know you don't seem to like the 3.9l 4bt because of the gear ratios, but I was wondering why you couldn't just do something higher as I would like to retain 4.10's.  I'm not as knowledgeable about this stuff...I also hear about the 3.3lBT cummins.  I has less hp and torque (obviously) but gets better gas mileage.  I read on that forum that people put better injectors and heads and turbos and intercoolers and they get the hp and torque of a 3.9l cummins with the better mileage it already gets.  I was just wondering what you or anybody else thought of this.  Oh, one more thing.  This might sound dumb, so forgive my ignorance, but can you swap a rear axle in for a front or is there incompatibility issues with that?  Thanks for posting guys!