5.2 Magnum in 2007 Unlimited? - JeepForum.com

 
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post #1 of 12 Old 02-25-2012, 07:58 PM Thread Starter
d_rehmann
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5.2 Magnum in 2007 Unlimited?

Hi JeepForum,

First poster here. I joined because I am in the process of purchasing a 2007 Jeep Sport Unlimited 4 door. I was looking at my truck that was in an accident the other day and started thinking. I really like the motor, its a 5.2 Magnum out of a '99 Dodge Ram, that only has 95,000 miles. I was curiously wondering what you guys think of doing a motor swap like this.

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post #2 of 12 Old 02-26-2012, 10:00 AM
churchofjt
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The 99 5.2 was rated for 220HP/295Ft/lbs. The 2007 3.8 V6 in the JK was 202/237. That seems like a lot of work for something that isn't going to be putting out at least 300 horse and 350 ft/lbs. Also, no idea about VA, but that swap is not going to be emissions legal in some states. I'm afraid you'd be better off doing a hemi swap if anything. Or better yet, wait a year and buy a 2012 JK with the 3.6.
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post #3 of 12 Old 02-26-2012, 10:53 AM
GraKee99
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It is illegial to swap a motor older than your current vehicle year so if you have inspection, you won't pass. And I agree with churchofjt, not worth the effort. Either supercharge the 3.8 or swap a Hemi.

Brian

WJ, WK, CJ5


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post #4 of 12 Old 02-26-2012, 11:08 AM
ratmonkey
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Many emissions states also specify that the motor can not be one that wasn't offered as oem that year.

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

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post #5 of 12 Old 02-26-2012, 11:14 AM Thread Starter
d_rehmann
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Wow, I did not even think about inspection and such. The reason I was curious is because of the extra two cylinders. It pulls pretty hard. Like I said, I was just curious. Thanks for the help!
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post #6 of 12 Old 03-02-2012, 03:49 PM
AndrewBu
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better swap for u would be a hemi swap
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post #7 of 12 Old 03-11-2012, 10:01 AM
greenmachine99
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Would you be interested in selling the motor? I'm in md and looking for a motor swap for my 99. You'd be better of with a hemi.
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post #8 of 12 Old 03-14-2012, 10:52 AM
tantan123
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I did not even think about inspection and such.
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post #9 of 12 Old 03-14-2012, 03:23 PM
Wheelin98TJ
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Quote:
Originally Posted by churchofjt View Post
The 99 5.2 was rated for 220HP/295Ft/lbs. The 2007 3.8 V6 in the JK was 202/237. That seems like a lot of work for something that isn't going to be putting out at least 300 horse and 350 ft/lbs. Also, no idea about VA, but that swap is not going to be emissions legal in some states. I'm afraid you'd be better off doing a hemi swap if anything. Or better yet, wait a year and buy a 2012 JK with the 3.6.
Sometimes the #s don't tell everything.

I have a little 4.7 V8 in my TJ and its a night and day difference compared to the 4.0 I6 it replaced.

The 4.7 V8 is only 235 HP and 295 ft/lbs.

The key difference is the 4.7 V8 makes more torque at 1,200 RPM than the 4.0 I6 does at its peak.

And it sounds better.

But at the same time, I can agree with what your saying. Here I am 2 years or so after the swap and I think I could use a little more power.
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post #10 of 12 Old 03-14-2012, 04:08 PM
Mike128
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I have a 5.2 magnum motor sitting in an old Dodge truck also so I've been toying with this idea. Need to get one project done first but I also hae some questions.

Doesn't the 5.2 take upgrades well? Meaning even though stock it gets 225/295, it can be tweaked to do much more? How is the aftermarket on the 5.2? How much more power does the Hemi have than the magnum.

I think those would also make a difference to see if it's worth it to do the swap. No matter what, it's going to take a lot of money.
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post #11 of 12 Old 03-14-2012, 07:16 PM
ratmonkey
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Dodge motor aftermarket parts are always priced about double the comparable Chevy or Ford items.
You can make one heck of a Mopar magnum motor (I've got a 408 long block looking for a home.)

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

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post #12 of 12 Old 04-01-2012, 12:11 PM
dusterdude
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You can bring it to my home...lol
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