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Unread 03-01-2014, 05:26 PM   #1
SourNewspaper
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Engine swap!

Hey guys! I currently own a 2000 wrangler tj 4 cyl and am looking to do an engine swap to a V8. I don't know a whole lot about what goes into this process, and just wanted to hear from you all ANY and all pointers/suggestions and things to avoid while going into this project. From what I've read online, a Chevy 350 is the best engine to use, because mounts are easily found to support this engine. However I've also read those engines can be a nightmare installing and literally EVERYTHING (tranny, driveshaft, etc) have to be replaced. I would have a professional shop do the work so I want to make sure I buy only what's essential and not get overpriced. Please give me any feedback you all might have,Thanks!

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Unread 03-01-2014, 08:58 PM   #2
uberxj92
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Search on here tons of threads on it. 5.3 usually wins out over Carb 350.
It all boils down to your wallet. Fab work isn't cheap to have done.
Have you considered a 4.0 stroker? Easier swap and you can get great performance with better MPG and less weight. And since they used them in your rig it would be a hell if an upgrade since you've already got the gears for it.
I run stroker's in 2 of my xjs. And a diesel in my mj. The stroker's kill my friends and other buds in my club here. The v8's can't stay out as long due to fuel.
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Unread 03-02-2014, 05:26 AM   #3
SourNewspaper
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I really had my heart set on a 350, but because my jeep did come with a 6 cyl I understand why that would make for a better swap. I figured if I was to bother with doing this I should just go all the way with an 8. I have a high budget, and this truck is used as an off-roader. I want as much power a possible, and if a 6 will do that for me then that's obviously the better choice.
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Unread 03-02-2014, 11:34 PM   #4
uberxj92
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Research stroker's. You can custom build them to suit yourself.
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Unread 03-03-2014, 12:06 AM   #5
jp360cj
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Quote:
Originally Posted by uberxj92 View Post
Search on here tons of threads on it. 5.3 usually wins out over Carb 350.
It all boils down to your wallet. Fab work isn't cheap to have done.
Have you considered a 4.0 stroker? Easier swap and you can get great performance with better MPG and less weight. And since they used them in your rig it would be a hell if an upgrade since you've already got the gears for it.
I run stroker's in 2 of my xjs. And a diesel in my mj. The stroker's kill my friends and other buds in my club here. The v8's can't stay out as long due to fuel.
I'm going to have to disagree on the better mpg/less weight. Been awhile since I looked up the numbers, but I remember an iron block 5.3 being slightly lighter than the I6. The aluminum block is 100# lighter than that.

I'd be curious to see the mpg on the strokers. I have read (although unverified) of several guys getting low 20s mpg with 5.3s in CJs. Even my antiquated 360 got 17-18mpg with 33s.

You'll also need address the rest of the drivetrain with the swap.
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Unread 03-03-2014, 10:54 AM   #6
Randonexplosion
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Originally Posted by jp360cj View Post
I'm going to have to disagree on the better mpg/less weight. Been awhile since I looked up the numbers, but I remember an iron block 5.3 being slightly lighter than the I6. The aluminum block is 100# lighter than that.

I'd be curious to see the mpg on the strokers. I have read (although unverified) of several guys getting low 20s mpg with 5.3s in CJs. Even my antiquated 360 got 17-18mpg with 33s.

You'll also need address the rest of the drivetrain with the swap.
X2

I get low 20s in my YJ with a 5.3/4l60e, 4.10s and 33s.

I'm not against a stroker, if you already have a 4.0, but if you are swapping from a 2.5 I don't see a reason not to do a V8. There is always the Mopar 5.2/5.9 but if money isnt a big issue and you "want all of the power you can get" Id say go for a 6.1 Hemi or an LS2/3. Upgraded axles are gonna be a necessity with a stroker or any V8.
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Unread 03-03-2014, 12:42 PM   #7
uberxj92
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I can't speak for other stroker's. But I've got 2 in my xj's . 1- 4.8, 35/14.50/15, 3.73 gears gets 14-15 in town.
2- 4.9, 33/12.50/15, 4.10 gears, 17 in town.
I know some if the folks in my club have the 5.3 in their cj/yj rigs. I've not heard any of them claim anything more than 17-19. But if you're getting low 20's in town. Then definitely roll with that swap. I would. But not in my xjs. I'm doing the 4bt in an mj.
Thank goodness for our Yota celica lol.
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Unread 03-03-2014, 12:54 PM   #8
Randonexplosion
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I should have clarified. Low 20s on the highway. I probably get 17-19 in town if I can keep my foot out of it. It doesn't do bad on the trail either.
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Unread 03-03-2014, 12:58 PM   #9
uberxj92
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Ok whew. Lol. Well with that info then you want to look at the other aspects. Like time, money, future repair/parts cost/availability. At least I would.
I still love American cast iron myself. I'm not an aluminum fan. But that's just me.
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Unread 03-03-2014, 03:05 PM   #10
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I will be using my jeep MAINLY for trail riding and Mudding. It does so some town driving. I know the mpg will suck but that's not a huge concern of mine.
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Unread 05-06-2014, 01:17 AM   #11
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Unread 05-10-2014, 05:02 PM   #12
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4.0, 5.2, and 5.3. I think those are your brightest options. The 4.0 being a relatively simple low cost option, the 5.3 probably being a little more expensive in the initial buy-in but paying off in ease as you move on, and the 5.2 being a middle-road cost option that you may see as more difficult.

The 350's no longer a very good cheap HP choice. The majority left are smoggers or more expensive than better options.
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