5.3 in a 91 wrangler
Thread Starter
Teching In
Joined: Oct 2005
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5.3 in a 91 wrangler Hello I am going to start on my jeep project soon. This is what I'm planning to do. Any help or input would be greatly appreciated.I'm going to put a 1999 5.3 truck eng into a 1991 jeep wrangler that had a fuel injected 4 cyl. I am planning on using a turbo 400 tranny for the reason of cheap rebuilds. The questions I have are?
1) going to use a howell harness. Is that a good one to use?
2) advanced adapters flex plate to put the 5.3 to the turbo 400 Is there any other wat to do this?
3) advanced adapter motor mounts. They cost around $126.00. Is there any other place to get them? Or should I fab them up myself?
4) Will the original jeep intank fuel pump put out enough pressure?
5) The computer Howell Told me what to have done to it to make it work. Any other input?
Thank You
1) going to use a howell harness. Is that a good one to use?
2) advanced adapters flex plate to put the 5.3 to the turbo 400 Is there any other wat to do this?
3) advanced adapter motor mounts. They cost around $126.00. Is there any other place to get them? Or should I fab them up myself?
4) Will the original jeep intank fuel pump put out enough pressure?
5) The computer Howell Told me what to have done to it to make it work. Any other input?
Thank You
Teching In
Joined: Jul 2006
Posts: 13
Likes: 0
Originally Posted by superjeep
Hello I am going to start on my jeep project soon. This is what I'm planning to do. Any help or input would be greatly appreciated.I'm going to put a 1999 5.3 truck eng into a 1991 jeep wrangler that had a fuel injected 4 cyl. I am planning on using a turbo 400 tranny for the reason of cheap rebuilds. The questions I have are?
1) going to use a howell harness. Is that a good one to use?
2) advanced adapters flex plate to put the 5.3 to the turbo 400 Is there any other wat to do this?
3) advanced adapter motor mounts. They cost around $126.00. Is there any other place to get them? Or should I fab them up myself?
4) Will the original jeep intank fuel pump put out enough pressure?
5) The computer Howell Told me what to have done to it to make it work. Any other input?
Thank You
1) going to use a howell harness. Is that a good one to use?
2) advanced adapters flex plate to put the 5.3 to the turbo 400 Is there any other wat to do this?
3) advanced adapter motor mounts. They cost around $126.00. Is there any other place to get them? Or should I fab them up myself?
4) Will the original jeep intank fuel pump put out enough pressure?
5) The computer Howell Told me what to have done to it to make it work. Any other input?
Thank You
I want to know too is there any people who have done this swap succesfully
On The Tree
Joined: Jan 2006
Posts: 172
Likes: 0
From: Quakertown, PA
The TH400 is a fine choice, but cheap rebuilds is kind of silly. About the only way you will kill it in a YJ is to flood it with water (ie deep water crossing). What transfer case do you plan on running?
Anyway, some answers:
1) Don't know. If you have the stock harness, use it. With the 5.3's underhood fuse block, there are five wires to hook up...
2) Use the GM spacer and bolts. Slot the holes in the 5.3 flexplate if necessary. Check out my website for more info.
3) I haven't used AA's mounts, but I have heard mixed reviews on them.
4) It will probably put out enough pressure, but likely not enough volume. Its simple enough to find out, just hook up a fuel pressure gauge to the fuel rail once you are done and running. Take it out for a few WOT runs, and watch the gauge. If the pressure drops off, you need to upgrade the pump.
5) Since you are using a TH400, I think you would be best served to have it programmed as a manual trans. Have VATS removed, and maybe the evap system and rear O2 sensors. Personally I wouldn't bother removing anything else emission related. Keep it as stock as possible to reduce the variables at first. Once you have it up and running, then you can play with the other stuff...
Anyway, some answers:
1) Don't know. If you have the stock harness, use it. With the 5.3's underhood fuse block, there are five wires to hook up...
2) Use the GM spacer and bolts. Slot the holes in the 5.3 flexplate if necessary. Check out my website for more info.
3) I haven't used AA's mounts, but I have heard mixed reviews on them.
4) It will probably put out enough pressure, but likely not enough volume. Its simple enough to find out, just hook up a fuel pressure gauge to the fuel rail once you are done and running. Take it out for a few WOT runs, and watch the gauge. If the pressure drops off, you need to upgrade the pump.
5) Since you are using a TH400, I think you would be best served to have it programmed as a manual trans. Have VATS removed, and maybe the evap system and rear O2 sensors. Personally I wouldn't bother removing anything else emission related. Keep it as stock as possible to reduce the variables at first. Once you have it up and running, then you can play with the other stuff...
I've done about 4 4.8/5.3 swaps... They are awesome motors for Jeeps.
http://www.terratraction.com/gallery/wilson/DSC01234
http://www.terratraction.com/carl/DSC02947.JPG
http://www.terratraction.com/carl/DSC01566.JPG
http://www.terratraction.com/carl/dave1.AVI - Just a lil' ole 4.8
http://www.terratraction.com/gallery/wilson/DSC01234
http://www.terratraction.com/carl/DSC02947.JPG
http://www.terratraction.com/carl/DSC01566.JPG
http://www.terratraction.com/carl/dave1.AVI - Just a lil' ole 4.8
Staging Lane
Joined: Feb 2006
Posts: 69
Likes: 0
harness Like jeepinpete said, use the original harness if you have it. I have the AA engine adapters in my CJ7/5.3 and would put a positive note on it. It gives multiple adjustments form side to side. Just can't say how much fun it is to drive around. Check out this shifter set up, I think it's cool. 5.3/4l60e all hooked up!!
Thanks
Thanks
The AA motor mounts are very nice. Don't buy the Novak mounts - they suck! Novak does make nice parts though. I did my own harness in the blue YJ (just modded the stock harness) The truck harnesses suck compared to the LS1. Waitforme performance does a great job on the harnesses and reprogramming.
What are you running for a transfercase POWER ON? Shifers look nice
What are you running for a transfercase POWER ON? Shifers look nice
Trending Topics
Originally Posted by POWER ON
Thanks for the good comments everyone. It's good to get all the encouragements. It's a Dana 300 with AA adapters.
Thanks
Thanks
Aww man - you need to twin stick it and learn how to do front digs!
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Verdad Gallardo Teching In
Joined: Jul 2006
Posts: 13
Likes: 0
My buddy and I where talking about swaping my 4 cyl wrangler with a built 350 and he told me not to bother building a SBC with that money you can have a 5.3 vortec with a delphi computer for 2 grand and have 300 hp stock. Right now im very fresh to the 5.3 and Ls1 engines. He said I should go with the delphi setup over the reflash and programing stuff much simpler and better.
I already have a TH350 tranny and a NP241 Tcase.
I also tought of running an LS1 how much can i expect to pay for and Ls1 engine only, alot of peole seem to sell the tranny and motor swap.
I already have a TH350 tranny and a NP241 Tcase.
I also tought of running an LS1 how much can i expect to pay for and Ls1 engine only, alot of peole seem to sell the tranny and motor swap.
Staging Lane
Joined: Feb 2006
Posts: 69
Likes: 0
Originally Posted by GM5.3Wrangler
My buddy and I where talking about swaping my 4 cyl wrangler with a built 350 and he told me not to bother building a SBC with that money you can have a 5.3 vortec with a delphi computer for 2 grand and have 300 hp stock. Right now im very fresh to the 5.3 and Ls1 engines. He said I should go with the delphi setup over the reflash and programing stuff much simpler and better.
I already have a TH350 tranny and a NP241 Tcase.
I also tought of running an LS1 how much can i expect to pay for and Ls1 engine only, alot of peole seem to sell the tranny and motor swap.
I already have a TH350 tranny and a NP241 Tcase.
I also tought of running an LS1 how much can i expect to pay for and Ls1 engine only, alot of peole seem to sell the tranny and motor swap.
Thanks
Teching In
Joined: Jul 2006
Posts: 13
Likes: 0
Originally Posted by tunedportcj5
I've done about 4 4.8/5.3 swaps... They are awesome motors for Jeeps.
http://www.terratraction.com/gallery/wilson/DSC01234
http://www.terratraction.com/carl/DSC02947.JPG
http://www.terratraction.com/carl/DSC01566.JPG
http://www.terratraction.com/carl/dave1.AVI - Just a lil' ole 4.8
http://www.terratraction.com/gallery/wilson/DSC01234
http://www.terratraction.com/carl/DSC02947.JPG
http://www.terratraction.com/carl/DSC01566.JPG
http://www.terratraction.com/carl/dave1.AVI - Just a lil' ole 4.8
1. Engine Harness
2. PCM from 5.3
3. underdash harness
4 reflash the PCM with out the tranny and other sensor crap.?
Originally Posted by GM5.3Wrangler
Is this what I need to drop a 5.3-or LS1 into my jeep
1. Engine Harness
2. PCM from 5.3
3. underdash harness
4 reflash the PCM with out the tranny and other sensor crap.?
1. Engine Harness
2. PCM from 5.3
3. underdash harness
4 reflash the PCM with out the tranny and other sensor crap.?
The ECM needs a lot of work. Delete rear o2s, vats, egr, trans.. etc
Teching In
Joined: Jul 2006
Posts: 13
Likes: 0
Originally Posted by tunedportcj5
What are you doing for gauges? there is not really a harness needed for under the dash if you are running aftermarket gauges.
The ECM needs a lot of work. Delete rear o2s, vats, egr, trans.. etc
The ECM needs a lot of work. Delete rear o2s, vats, egr, trans.. etc
will this harness solve alot headaches?
http://cgi.ebay.com/ebaymotors/LS1-L...spagenameZWD1V
Joined: Sep 2004
Posts: 3,148
Likes: 12
From: Downers Grove, IL
That conversion harness is not worth it IMO, speartech and wait4meperformance both sponsor the board here and I believe that they are both cheaper to have your harness reworked than from the place on e-bay.
If you can handle electrical then you may just want to get a stock harness and fuse block since it is pretty easy to hookup.
I paid $800 for my motor, computer, wiring, and all the accys except the A/C compressor. But it depends on where you are located. I have heard people saying you should be able to find a 5.3 with accys computer and wiring for 500 but I have never seen one that cheap.
If you can handle electrical then you may just want to get a stock harness and fuse block since it is pretty easy to hookup.
I paid $800 for my motor, computer, wiring, and all the accys except the A/C compressor. But it depends on where you are located. I have heard people saying you should be able to find a 5.3 with accys computer and wiring for 500 but I have never seen one that cheap.
Staging Lane
Joined: Feb 2006
Posts: 69
Likes: 0
Engine Deals
Originally Posted by GM5.3Wrangler
how much can i expect to pay for an ls1 engine? where do people find them?
IM still deciding between the 5.3 and and the ls1 i'll wait and save a little more if the ls1 is worth it.
IM still deciding between the 5.3 and and the ls1 i'll wait and save a little more if the ls1 is worth it.
Unreal deals!!!
If that does not come out, go to craig's list and pick Orange County, go to parts and search for vortec engine.
Thanks