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Unread 06-17-2012, 06:04 PM   #1
Kemah
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What are your thoughts on this? 4cyl TJ w/ turbo

I have a 1997 4cyl Wrangler that I have had for a number of years up in Nebraska with a snow plow on it. I had the plow removed the other day and I am going to be bringing it to Texas next week. (Fun Drive, I know) So I have planned on doing some upgrades to it but I know the power the engine produces is a problem if I add much weight. Talking to my buddy last night I decided to put a Turbo on it. He has an extra Garrett turbo that I will buy from him and most of the other parts I will need, the only thing is we will have to custom weld all of the pipes. I am not sure how hard it will be to route these. Along with doing that I was thinking about buying a Ram air hood and rerouting and custom building an air box that will sit in front of the ram to help with cooling.

I already have problems maintaining interstate speeds and if I put a lift and larger tires on it I am sure it would be even worse. Based off of his estimates he thinks the turbo that he has with a basic setup should yield around 75 extra HP. From there forward there are other things I can do to get some more although I am not trying to build a race car and dont want to have something that has to be tweaked all of the time to keep it running.

I am sure someone on here has done something like this or may have some thoughts and ideas that would be helpful, so please let me know.

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Last edited by Kemah; 06-17-2012 at 06:35 PM..
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Unread 06-18-2012, 06:00 AM   #2
4banged
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The turbo can be done but I've yet to read a turbo thread that went half as smoothly as planned. You might want to consider selling it now and buying a 6 cyl.
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Unread 06-18-2012, 06:20 AM   #3
1999TJRED85000
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I would imagine (and I'm only guessing) that due to the weight of the wheels/tires, and the aerodynamics of our moving bricks, the turbo would be "turboing" so often that heat might be a real problem. It would be a really neat project though. If you do it, post lots of pics for us.
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Unread 06-18-2012, 06:37 AM   #4
sethhawk1
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What is your tire size. You may have a gear ratio problem if you have trouble keeping up with highway speed.
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Unread 06-18-2012, 07:23 AM   #5
OhSethiO
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Idk about turboing a wrangler... It would be neat to see, just don't see it being practical. Don't forget a good tune afterwards as well... If not you'll blow your motor QUICK
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Unread 06-18-2012, 08:01 AM   #6
Kemah
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Right now it is totally stock, besides some simple airbags on the front springs that I needed when the plow was on it. I will have to look when I get to Omaha but I would assume the wheels are 15's and just basic tires. I rarely left the city with this vehicle but the few times I did it would struggle to get to 70-75 mph on the interstate on flat ground. Hills would kill it at high speed. Around town or at 55 mph it runs great.

Last year I had to drive it to South Dakota and I believe that I experienced "Death Wobble" I had just turned a corner and got back up to about 50 mph and the front wheels went nuts. It felt like they were slapping off the ground. After that I was a little nervous but kept going and the wheel shook a bit around curves but not too bad. I also think that it could just be bad shocks from having that plow on there all these years. On my way to Texas next week I will probably fill up the air bags to see if that helps. And I had a friend take it to a shop last week to have it looked at and fixed if they can find anything wrong with it, so I will see what they say in a day or so.

My friend is a lot better with Turbos than I am so besides understanding what they do and how they work I have pretty limited knowlege, but we had thought the biggest hurdle would be the fact they make no computers for this motor to take care of the timing. He has a unit that we will try to rewire that changes the timing by 6 degrees when the motor goes into boost but leaves it stock when it is out. For my cooling ontop of the Ram air hood I was thinking about having a guy I know do custom fiberglass Louvres in that hood to let the heat release easier. and possibly create some type of scoop underneath to help the engine compartment breath if I need to.

My other option is obviously a motor swap so I figured that I would do this with a turbo that is big enough for the 4.0 also and if I blow the motor then I can put it on after I do a swap. We are planning on running 6-8 lbs of boost with the 2.5.
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Unread 06-18-2012, 09:06 AM   #7
Kemah
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just got the call, it was a broken steering dampener and a broken sway bar. Being fixed now. Also I had about 400lbs of sand bags in the back so taking those out will probably help a lot. The sand bags were not in there when I was having the speed issues.
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Unread 06-18-2012, 09:14 AM   #8
sethhawk1
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Quote:
Originally Posted by Kemah
just got the call, it was a broken steering dampener and a broken sway bar. Being fixed now. Also I had about 400lbs of sand bags in the back so taking those out will probably help a lot. The sand bags were not in there when I was having the speed issues.
Your asking for trouble on this forum if you start posting dw fixes with sway bars and steering stabilizers.
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Unread 06-18-2012, 01:59 PM   #9
1999TJRED85000
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It sounds like you need some basic maintenance. Tune up. Check all the u-joints, ball joints, steering components, etc. to be sure that they aren't overly worn. There are some very thorough discussions on the forum about all of this. No need to rehash.
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Unread 06-18-2012, 02:04 PM   #10
biffgnar
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Quote:
Originally Posted by Kemah View Post
just got the call, it wasn't a broken steering dampener and a broken sway bar. Being covered up now.
Fixed it for you!

Seriously, neither of those things are DW causes. Do a search for dry steering test. Read and do that for proper diagnosis yourself rather than paying shop to waste your money.
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Unread 06-18-2012, 02:19 PM   #11
Kemah
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Thanks guys, I am assuming that DW is Daily Wear. The only reason I had posted this was I am about to drive 1100 miles and wasn't sure what the problem was. The guy doing the work is a friend and is only charging me for the parts, and I believe that this could have happened with the stress of using the snow plow. But I am going to go read about the dry steering test now. Thanks.
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Unread 06-18-2012, 02:21 PM   #12
biffgnar
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Quote:
Originally Posted by Kemah View Post
Thanks guys, I am assuming that DW is Daily Wear.
DW = Death wobble (that you brought up in your prior post)
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