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Old 04-08-2013, 05:14 PM   #1
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A monumental project?



Hello everyone,

I have an interesting project that I would love everyone's input on. The basic idea of this project is to take a smaller and more efficient/powerful engine (like a newer 2.0L nissan sentra engine) and plant in into a 1992 jeep YJ. Before I start I want to lay down some organizational rules as to not flood this post with short information lacking responses. So here they are.
- please make you response longer than one sentence and explain your train of thought on what you stated
- please sight as many sources or explain the experience that makes you come to the conclusion that you have come to.

So the inspiration of this project has come from me wanting to put my mechanical and craftsmanship knowledge to the test, and make a hybrid commuter jeep. I don't mean look at my gay prius hybrid; I mean gets 30mpg but still has more power than the stock 2.5L engine that came with it.
This is my train of thought on the process that I have planned out so far.
1) Buy a brand new jeep for real off-roading and driving to and from work.
2) search for a donor engine and possible manual transmission
3) contact 150 tune ups or another place like them to see what can be done about the electrical system
4) Make the measurement and either order or create my own custom brackets
5) try the first transplantation
6) identify problems find solutions
7) repeat step 6 until I have completed a successful project
I want to go into more detail about each step though and try to eliminate or atleast identify any problems that I can four shadow. This is where I would like you guys to help me out on trying to make this project go as smoothly as possible when I decide to get started on it.

step 1 explanation)
- easy enough, nuff said

step 2 explanation)
- My wife has a 2011 nissan sentra and I absolutely love the engine and manual transmission that it has. I have a 2.0L putting out about 155 HP with 145 lbT and a close interval 6 speed manual transmission. I have searched all over the internet and have not been able to find anything about transplanting a small inline 4 engine like a sentra's or a ranger's into a jeep. This is why I really wanted to start this post. Hopefully It will help anyone else with a similar plans actually put them into action.

step 3 explanation)
- Anytime you swap an engine the electrical system is something you have to consider. If anyone who is working with a company that does the custom programming I would love to hear what you think would help with this project. Some major things I can see having problems is in the power steering area where jeeps have a far supior turning radius that other vehicles. Would I need to put in a jeep power steering system or would an electrical system like the sentra has be able to keep the same turning radius with the right programming?

step 4 explanation)
- I am fairly certain I have this part covered but there are many things I am unsure about. I know that I will have to make costum brackets for the engine but can anyone point me in the direction of a place that might be able to help me predict any other brackets that might be needed for something else (ex. larger coolant pump incase there is a need for one). Anything in that in direction would be really helpful. If anyone wants to explain the process for someone who doesn't know though I am sure they would appreciate it.

step 5 explanation)
- Hopefully I will be able to find a place or person that would be willing to let me borrow an engine jack for a reasonable price so that I can go through the rest of the process without paying an arm and a leg. I am also pretty sure that I want to put a new manual transmission in so that I am not wasting a good amount of gas on the really low gear ratio in a soon to be commuter jeep. The sentra transmission that I talked about earlier has what feels like to be similar gears on the first three and only when it gets up to the last 3 gears does it really feel any different. If anyone has any better ideas on good transmissions to put in that will be good on gas but still able to have good gears to get through some basic off roading for camping and stuff.

step 6 explanation)
- obviously there are going to issues so any issues you can guess on bring it up with why you think it will happen and what you think I can do to eliminate it.

Thanks for all the help and I plan on keeping this post up to date for when I start doing more research and actually start the project. Hopefully together we can make this work seemlessly. If anyone lives in northern california wants to help with this project in person send me an email and I will keep in touch with you and we can meet up when I start it. I live in the San Joaquin county to be more accurate to who is near by.

So lets get this thread started and see what we can accomplish with this theoretical conversation of right now.

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Old 04-08-2013, 05:21 PM   #2
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sorry for the poor spelling. please ignore until i come back later and review my own thread so that it doesn't have all those problems.

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Old 04-08-2013, 09:49 PM   #3
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Monumental puts it lightly. I would not put an engine designed to be transverse mounted in a Jeep, and would also not look to use such a computerized engine. The reason why is the over abundance of better suited rwd engines with simplier functions and control monitors... besides that engine pulls 1klbs less than your Jeep weighs. It likely will lose some pep after the swap.

Why not look at a Wankel engine, maybe even a 4 rotor? With a tiny little turbo you could keep the low end torque, or just make one hell of a sand buggie. Round town would certainly be fun, and it would certainly turn heads.

Weeeeee (shift) weeeeeeeeeeeeee (shift) weeeeeeeeeeeeeeeeeeeeeeeee

Or you can always go diesel....

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Old 04-08-2013, 11:30 PM   #4
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thanks blueridgeYJ

I really do think that with a few modifications I can make that sentra engine fit. I never thought about putting a radial engine in it though. It would definitely turn some heads.

Why would you personally not use an engine with a bunch of electrical pieces to it. I was thinking about it in two different ways. One it could be easier if the programming would go smoothly or Two it could be a total nightmare because I would have to completely make a custom wiring harness and all the other issues that I can't even imagine. I took some pictures of the two engines so that everyone could at least see the difference and the similarities in size and the shape and placement of everything. I also have a picture of a 2002 ford ranger engine that would not be my first choice though.

ok Ill have to get back to everyone about the photo's once I figure out how to post them.
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Old 04-09-2013, 08:33 PM   #5
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I am sure you could make it fit - I have seen a rocket powered V-dub beetle and a crazy monster beast of a car with a turbine engine.... but why? There are so many other options.

IMO a can/obd engine will have way too many electrical sensors and such, even if you remove the computer and rewire it to work with a different computer (reprogramed of course... good luck). Stick with a simpler suck squeeze bang blow engine and you will spend more time riding and less time manufacturing.

Certainly to each his own, and don't let me talk you out of something just because it is difficult. I just think there is an easier way to get there besides going through the elbow first.

Just my shillings...
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Old 04-10-2013, 11:40 PM   #6
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So i looked into the rotary engine idea some more and I am stocked to look further into it. So far I like the idea of putting an RX7 or 8 engine in it. From the looks of it it will simpler and more gear toward that middle ground that I am trying to achieve between DD and light camping off roader. The biggest problem i see with the rotary engine though is the fact that mazda is no longer going to be making the rotary engines and that means that parts and support will start to die off. I can also see emission problems since I live in California. Screw you California!
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Old 04-11-2013, 08:08 AM   #7
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Quote:
Originally Posted by germannnick View Post
So i looked into the rotary engine idea some more and I am stocked to look further into it. So far I like the idea of putting an RX7 or 8 engine in it. From the looks of it it will simpler and more gear toward that middle ground that I am trying to achieve between DD and light camping off roader. The biggest problem i see with the rotary engine though is the fact that mazda is no longer going to be making the rotary engines and that means that parts and support will start to die off. I can also see emission problems since I live in California. Screw you California!
Ahh... the car hatin state.

Check on 4 rotors pulled from Japanese cars ($$$). Not only did they make a 3 rotor (rx7), but a mainland sedan had a bigger one. In Japan, they replace motors to keep up with emissions and US companies go buy the cars, cut them in half, then sell the imported clips.... you want a front clip. Jarco is an east coast company that does it, IDK of cali companies but I am sure there are some.

Or you can buy a crate motor, but it will cost about the same as most front clips (which a clip will include everything in front of the tranny, including the tranny).

One of my buds bought one (rx7, 2nd gen) and we used the firewall, ps rack, and a few other pieces to go right hand drive with it. Another feller got a front and rear clip for a AWD Celica (like holds the record at Pikes Peak still) and built one beast of an awd with a JDM Mr. Two turbo charged power plant.

But Jeeps go places those just won't.
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Old 04-11-2013, 09:23 AM   #8
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Oh yeah, the 4 rotor is a 26b. The 3 is a 20b.


Rx8s had a little different design (and way too many computers ).
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Old 04-13-2013, 03:31 AM   #9
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Sweet thanks for all the info and I am continuing to research it. I'll let you know what happens.

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commute , elecrical , engine swap , mpg , tranny swap

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