Dogote

I will just about copy your build as mine progress's. Very nice, I love the color and the interior. A perfect MJ IMOHO.

Your Comanche is 100% bad @$$ dude! I love that you made the 2.5 run like that.

there are longitudinal mount ecotec engines. There is also a couple manual trans options. I have moved on from ecotec. If I were to do a car with an ecotec, I would do a small (probably very small) car like an MG Midget, and I would build it specifically for autocross. It's been done, and the results were impressive. I can make anything I need. A turbo on a 2.5, based on what others have done, ends up on the passenger side of the engine compartment. Stock manifold, custom pipe that goes under the engine and to the turbo. Ideally the turbo should be as close to the manifold as possible for efficiency, but lately I have seen many engines with the turbo a few feet (of pipe length) from the manifold and they are making power just fine. I wouldn't install a turbo without intercooling. The mega squirt will take care of fuel and spark needs. Centrifugal would be neat. The Ripp systems used on a lot of JK's put out decent power numbers on the dyno, but this is a craigslist/ebay/junkyard build. I won't find a centrifugal blower cheap, but there are plenty of good cheap turbo's.

I really want to keep a 4 cylinder in it.

I know a local guy who may have "blown up" his 2.5 YJ. I think he has a '93. I also think he just blew the head gasket. I heard he was pulling the 2.5 and dropping in a small block Chevy. I find out what he is doing with the '93 YJ stuff. I wonder if there is anything he will need to his SBC install, that I would also need to use from his MPFI?

There is a storm breaking? Looks like you must be near Monroe/Sultan area. I am all too familiar with the area. I drive Stevens Pass at least once a month, usually at night, and often in a storm.

I think going to MPFI is the next step with this engine. I have been reading as many threads as I can find to see what others have done. Not a lot out there, at least no any renix to mpfi threads that go anywhere.

I don't really care about bang for the buck/effort involved that much. It is more about doing a project like this. I have never added a turbo to anything. I have also never put an engine into a car it didn't belong in. It is all about the project to me. What I have done that makes me think I can do something interesting to the Comanche: rebuilt/modified 100's of new or nearly new Ducati motorcycle engines for customers. fully disassembled, inspected, and modified several turbine helicopters. (and put them back together and flew them) restored, maintained, inspected, and modified 100's of airplanes restored several cars restored dozens of motorcycles. I have tools, a shop, and an old Comanche. If not the Comanche, I'll do a homemade turbo set up in something else. I am kind of back to turboing the 2.5. I've been looking at Megasquirt injection to help with fueling. I don't care if it is fast, has as much power as a small block chevy, or is that reliable.

Yeah, I have came to my senses. As far as the amount of work, I have done that much work, many times. I really don't want to much that much effort into a 30 year old pick up truck. But........... I would not keep much of the factory harness. I would use most of the donor vehicles harness. I wouldn't use any of the Renix system on a different engine. What would be the point? The engine feels old and tired, because it is. Too much leak down around the rings is the issue here. I think I was leaking nearly 15% at 80 PSI, cold engine. No valve loss, due to a recently installed new head, but the rings are shot. No oil leaks anymore though, fixed all of them. I think I'll stick to the "normal" plan, just pulling the engine and doing an overhaul. I'm sure it will be just fine with the 2.5. Who make bigger bore/stroked cranks? All I find online is 505 performance. Their stuff looks okay, but they have a horrible reputation on the internet, especially in the JK world.

Since it is an '86 four cylinder MJ, I gather from searching this, and other forums that it is probably 4.10:1, but I have not verified that. I just took off 265/70/15's on aftermarket wheels and put on stock wheels with stock sized 215/80R/15 studded snow tires. It it much nicer to drive with the small stock tires. Ideally, I would like to put it on 255/75/17 or similar height/width. What would my tire size and gear ratio have to do with doing a drive train swap?

My 1986 2.5, 5 speed Comanche is running pretty good now for a Renix 2.5. About all that wrong now is a quick cough or two when its cold, and I think I have that figured out now. But, the 2.5 is old and worn. It will only get worse. I am considering overhauling it, the parts kits seem cheap. But, then I have a overhauled pushrod 4 cylinder with one of the worst fuel injection systems I have ever dealt with. As I think about other engines I could swap into the Comanche, I keep thinking about the Ecotec's. They have a lot of after market support, they are getting used in everything, Off road racers, autocross cars, rock crawlers......... I would most likely just buy a wreck with the engine I need. Upon looking at eBay and Craigslist, there are several possibilities out there for cheap. Another idea. Find a wrecked JK, and put as much of it's drive train and electronics in the Comanche as possible.

The part number is correct for a 1986 Comanche, so says my internet research. I could be wrong.

Sounds fair. I would like to see pictures of the parts, if it's not a bother. I am 50/50 as to if this is the way I will go or not. If my other thing doesn't pan out, I'll probably buy them.

How much? What do you think it would take to ship that to 98817?

Here are some pictures of what I have: