Project Magnum YJ - Page 6 - JeepForum.com

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post #76 of 441 Old 10-25-2010, 07:29 AM
73Dart
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1989 YJ Wrangler 
 
Join Date: Mar 2009
Location: Shelby, NC
Posts: 620
Quote:
Originally Posted by MoparFreak69 View Post
Actually I find the easiest thing about the swap is smiling every time I leave some unsuspecting sucker at the stoplight scratching his head trying to figure out what happened!

It happens like this;
Green, off in second
Shift into 3rd at about 45 (guessing about 4k RPMs)
Shift into 5th when I am at the speed limit (or to slow back down to it)
Putt along until the next "stoplight adventure"
I do not get to enjoy that feeling as much. To keep the swap simpler I went with a Throttle Body injected motor with a neck snapping 160 hp and 220 lbs of torque. Thats right my v8 has less hp than the 4.0l six, but I have 20 lbs more torque. I went with the 8 to get rid of the Carter BBD more than anything, and the fact that it was sitting in a van my dad was using for parts. All in all my swap cost me less than $300.


89 YJ with a 5.2l V8, 5 Speed ax-15, RC aals giving me 1.5" of lift plus 1" lift shackles giving me a total of 2.5" of lift, 31x10.5x15 A/T tires, no carpet, rinolined tub, Family style roll bar.

My motor swap thread
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post #77 of 441 Old 10-25-2010, 09:11 PM
stoveguy01
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1989 YJ Wrangler 
 
Join Date: Mar 2008
Location: Bonney Lake
Posts: 193
well I done basicly the same thing you did. I used a 97 engine swaped a 94 fuelrail and wiring and puter it runs great but I do have a check engine light for the missing egr
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post #78 of 441 Old 10-25-2010, 09:14 PM
PlatinumNiner
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1998 ZJ 
 
Join Date: Oct 2009
Location: Long Island NY
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Quote:
Originally Posted by 73Dart View Post
I do not get to enjoy that feeling as much. To keep the swap simpler I went with a Throttle Body injected motor with a neck snapping 160 hp and 220 lbs of torque. Thats right my v8 has less hp than the 4.0l six, but I have 20 lbs more torque. I went with the 8 to get rid of the Carter BBD more than anything, and the fact that it was sitting in a van my dad was using for parts. All in all my swap cost me less than $300.
What motor did you swap in that has HP and TQ numbers that low?
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post #79 of 441 Old 10-25-2010, 09:20 PM Thread Starter
bmgadg
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1992 YJ Wrangler 
 
Join Date: Mar 2008
Location: Mississippi
Posts: 465
Quote:
Originally Posted by stoveguy01 View Post
well I done basicly the same thing you did. I used a 97 engine swaped a 94 fuelrail and wiring and puter it runs great but I do have a check engine light for the missing egr
Glad to know someone else is running that setup. Is there any way to trick it into thinking the egr is there?
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post #80 of 441 Old 10-26-2010, 07:56 AM
73Dart
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1989 YJ Wrangler 
 
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Quote:
Originally Posted by PlatinumNiner View Post
What motor did you swap in that has HP and TQ numbers that low?
5.2l V8 from a 90 Dodge B250 van.

89 YJ with a 5.2l V8, 5 Speed ax-15, RC aals giving me 1.5" of lift plus 1" lift shackles giving me a total of 2.5" of lift, 31x10.5x15 A/T tires, no carpet, rinolined tub, Family style roll bar.

My motor swap thread
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post #81 of 441 Old 10-26-2010, 06:54 PM
PlatinumNiner
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1998 ZJ 
 
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OK so the hard part is done. Why not get yourself a 5.9 or a higher HP 5.2 and just swap it in? THats the easy part after you do everything needed to do the actual V8 swap.
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post #82 of 441 Old 10-27-2010, 11:10 AM
73Dart
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1989 YJ Wrangler 
 
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Location: Shelby, NC
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Because I am happy with the v8 I have. I dont need the extra power. I only do a little light wheeling and camping and the power I have if plenty enough for that. I just really wanted the relibility of fuel injection and to be able to tell people that it is a v8. When I want to go fast I drive the Charger.

89 YJ with a 5.2l V8, 5 Speed ax-15, RC aals giving me 1.5" of lift plus 1" lift shackles giving me a total of 2.5" of lift, 31x10.5x15 A/T tires, no carpet, rinolined tub, Family style roll bar.

My motor swap thread
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post #83 of 441 Old 10-27-2010, 11:26 AM
PlatinumNiner
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Probably better that way anyway since it looks like you have stock axles. The D35 cant take much
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post #84 of 441 Old 10-27-2010, 09:04 PM
73Dart
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1989 YJ Wrangler 
 
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Location: Shelby, NC
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I know, that is another reason I like the motor I have. I figure since it has roughly the same hp and tq of the 4.0 then I shouldn't have any unreasonable problems with the axle. A 8.8 swap is in the future, but I think I am going to wait until the 35 actually goes out.

89 YJ with a 5.2l V8, 5 Speed ax-15, RC aals giving me 1.5" of lift plus 1" lift shackles giving me a total of 2.5" of lift, 31x10.5x15 A/T tires, no carpet, rinolined tub, Family style roll bar.

My motor swap thread
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post #85 of 441 Old 10-27-2010, 09:14 PM
73Dart
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Quote:
Originally Posted by bmgadg View Post
Glad to know someone else is running that setup. Is there any way to trick it into thinking the egr is there?
How does the computer know that the EGR is working. Is it based on a coil or is there a air flow switch measuring the gass flow. If it is just looking for a coil then you should be able to add one in but not hook it up. On mine the I have 3 coils mounted on the back of the motor that when energized supply vaccume to the actual valves that open and close. I left the coils hooked up to the computer, but removed the vaccume lines that run the egr and hooked all the coil outputs together. That way they energize when the computer tells them to, but they effectively don't do anything. The computer is non the wiser, and it keeps the check engine lite off. This not a very good pic, but it is the only one I have that shows the valves. If you look behind the distributor you can see the top of the valves that control all of the emisions equipment.

89 YJ with a 5.2l V8, 5 Speed ax-15, RC aals giving me 1.5" of lift plus 1" lift shackles giving me a total of 2.5" of lift, 31x10.5x15 A/T tires, no carpet, rinolined tub, Family style roll bar.

My motor swap thread
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post #86 of 441 Old 10-29-2010, 09:01 AM Thread Starter
bmgadg
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1992 YJ Wrangler 
 
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Quote:
Originally Posted by 73Dart View Post
How does the computer know that the EGR is working. Is it based on a coil or is there a air flow switch measuring the gass flow. If it is just looking for a coil then you should be able to add one in but not hook it up. On mine the I have 3 coils mounted on the back of the motor that when energized supply vaccume to the actual valves that open and close. I left the coils hooked up to the computer, but removed the vaccume lines that run the egr and hooked all the coil outputs together. That way they energize when the computer tells them to, but they effectively don't do anything. The computer is non the wiser, and it keeps the check engine lite off. This not a very good pic, but it is the only one I have that shows the valves. If you look behind the distributor you can see the top of the valves that control all of the emisions equipment.
There is an egr switch that has a harness connector plugged into it. I'm thinking about leaving the switch mounted and plugged in just to see if the ecm will think everything is cool.
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post #87 of 441 Old 10-30-2010, 12:14 PM
MoparFreak69
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Location: Boise
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I think that the PCM will still throw a code because it is looking for a change in Hydrocarbons (HC) emissions (via O2 sensor) when it opens the valve. The purpose of the EGR was to reduce HC by recycling some of the exhaust to be burned again, thereby ensuring a more complete burn of the fuel through higher combustion chamber heat. The OBD-II systems did away with this because they added a second O2 sensor to check on the after cat values and also through better fuel and spark mapping. In reality it isnt going to affect your performance and may take more work to disable than to just install. You might just leave it and let it be if you are concerned with your MIL(check engine) being on. If you dont have the stuff all you need is a passenger side manifold with the tube that connects to the intake manifold and the valve that sits on the manifold. Everything else is already there.

90 YJ 5.2 Magnum, AX-15, 231 SYE'd
D44 front, welded/trussed AMC20HD rear. 4.56 gears soonish.
Western 6 lug aluminum wheels, with 35x12.50x15 Wrangler MTRs
MYj Build
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post #88 of 441 Old 10-30-2010, 01:18 PM
panman
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Location: massachusetts
Posts: 79
novak conversions says that the ax15 is a medium duty trans. so i would say you should be ok,although that depends on how heavy your right foot is i guess. i'd say just be ready for an upgrade for that bad day( if it even comes,you may never see it)
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post #89 of 441 Old 12-06-2010, 08:53 AM Thread Starter
bmgadg
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Join Date: Mar 2008
Location: Mississippi
Posts: 465
Ok a little update... Finally got moved into my new place and settled in. This weekend I joined the motor to the AX-15 and it all bolted up like it was made to be together. Took a little maneuvering to get the input shaft in the pilot bearing, but overall it went really well.



Next step is wiring, OMG this is a daunting task! I started going through the YJ harness trying to pare out the unneeded wires. I have a FSM for it, so it's going ok so far. I also have a FSM for a 95 Ram 5.9, but it doesn't show the pin outs for the three connectors that are at the end of the computer harness. I mean it shows them, but just shows a circuit number for pin 1, etc. So what do I do now? Anyone know the actual pin outs for those three connectors? One is black, one is gray, and one is light gray.
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post #90 of 441 Old 12-06-2010, 06:10 PM
ratmonkey
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you can get the OBDII pin outs from some of the dodge forums. i had them on my puter, but seem to have misplaced them a bit.

'97 zj 5.2, some stuff, some other suff, and some things that even work sometimes.

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