Chevy LS 5.3 liter swap in my ZJ - Page 2 - JeepForum.com

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post #16 of 39 Old 05-11-2010, 07:25 PM
ZJ5point2GCL
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i think about putting a 5.3 in all the time, but at this point a nice set of heads and a cam will be good for me


98 Deep Slate Niner- 6''s on 35's ---11 F150 Platinum Pearl White- Modded Tiny V6 with Two Turbos. ---93 Black 5.2 limited- Slowly dying in my Parents Driveway
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post #17 of 39 Old 05-12-2010, 10:05 AM
Texas ZJ1
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Originally Posted by Sirbreakalot View Post
5.9 isn't really much of an upgrade to the 5.2, still an under performing turd.
So, going from 220 hp to 375 isn't much of an upgrade to you?

You should do the 5.3 swap and do a complete write up including the computer, transmission and etc.


Hunter

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post #18 of 39 Old 05-12-2010, 10:19 AM
JrMechanic
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Originally Posted by Texas ZJ1 View Post
So, going from 220 hp to 375 isn't much of an upgrade to you?

You should do the 5.3 swap and do a complete write up including the computer, transmission and etc.


Hunter
In all fairness, that's not a stock 5.9. A stock 5.9 only offers about 20hp over the 5.2. IMO, it's not worth swapping a good running 5.2 for a 5.9, unless you plan to mod the 5.9 thereafter. If you plan to keep it stock, that's a lot of trouble for 20hp.

In your situation, you did some work to the 5.9, which is the way to go.

Want to swap an NP242 or NP231 into your ZJ? Here's how:
http://www.jeepforum.com/forum/f13/n...pdated-685644/
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post #19 of 39 Old 05-12-2010, 10:47 PM
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Originally Posted by Texas ZJ1 View Post
So, going from 220 hp to 375 isn't much of an upgrade to you?

You should do the 5.3 swap and do a complete write up including the computer, transmission and etc.


Hunter
Compare built to built or stock to stock, don't make this into something silly. I love Chrysler products but keep in mind most of my wrenchin is around the LSX community and most of what I work on is Fbodys and Corvettes and LSX conversions. What do you want to know about an LSX conversion? I can tell you based on what vehicles I have done them in. I have a couple of harnesses laying around as well as a 6.0, a 5.7 (it's hurt though), and a couple of 5.3's. You were probably being a smart *** and assuming I was just talking out of my rear. I do know a thing or two but am far from a know it all like some people. Unless I get really bored I won't be taking on my 6.0 swap for my ZJ until next winter. I have never done any major writeups as I do my projects for me, friends, and customers. I don't do what I do to impress others. Not my style, as it is some peoples.

As far as a 5.3 swap, I have done a few LSX engines in many vehicles including XJs, YJs, TJs, just haven't happened to have an opportunity to put one in a ZJ or WJ.

It is definitely not a swap that is ideal for just anyone. You have to have means and resources to get the job done. If I wasn't already waist deep in GM parts I would be happy to toy around with a 5.2 or a 5.9. Ported magnum heads, a decent cam, and the right bolt ons can make for plenty of power for most of us as you obviously already know with your 5.9 liter.

BTW, is that 375hp guestimated based on a some company claimed numbers added up and just thrown out there or is that dyno proven horsepower? Anything I build will go on a dynojet chassis dyno measuring true wheel horsepower.

Regardless of if you are making 200 or 400hp doesn't matter. Looks like you guys have some killer places to wheel and aren't afraid to beat on these oversize station wagons. Props for having some nice pics on here. I need to get back out there and start beating on and breaking stuff again. Been a rough year with being laid off from my full time job and all.

1998 Grand Cherokee Limited

5 speed/NP231 8.8 swap coming in 2010

Last edited by Sirbreakalot; 05-13-2010 at 10:58 AM.
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post #20 of 39 Old 05-13-2010, 10:03 AM Thread Starter
Fixxxer_ZJ
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Thanks for all the responses, if I put a set of heads on my 318, I heard all the Mopar made heads have issues with cracks forming near the valve guides. Is that true? As far as the 5.3 swap goes, I'm also part of a car club where a lot of people run LS engines and upgrade all the time, so that is why my cam, intake etc prices were low because I can usually find a good deal on that stuff. The 5.9 is an option but, I like the internal balance of the 5.2 over the external of a 5.9, and I could probably mod the 318 for the cost of a 360 and mods. I'm really on the fence on whether to swap or mod. My 5.2 is at about 140,000 miles, never missed a beat yet. And I have been running full synthetic oil since 70,000 miles, so how much life is left in my 5.2, and how long would it last with mods?

1998 5.9 Limited, CAI and Exhaust-My toy
2002 WJ Limited 4.7 HO, QuadraDrive-also mine :D
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post #21 of 39 Old 05-13-2010, 10:24 AM
JrMechanic
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The factory 318/360 heads have a tendency to crack. Aftermarket R/T heads, Iron Ram heads, and the Edelbrock heads do not though.

If you've taken care of that 318, the motor itself has at least a good 70,000-100,000 miles left. Mod it, then when it starts using oil or blows up, pull it out, build a stroker, then call it good.

Want to swap an NP242 or NP231 into your ZJ? Here's how:
http://www.jeepforum.com/forum/f13/n...pdated-685644/
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post #22 of 39 Old 05-13-2010, 10:48 AM
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Quote:
Originally Posted by Fixxxer_ZJ View Post
Thanks for all the responses, if I put a set of heads on my 318, I heard all the Mopar made heads have issues with cracks forming near the valve guides. Is that true? As far as the 5.3 swap goes, I'm also part of a car club where a lot of people run LS engines and upgrade all the time, so that is why my cam, intake etc prices were low because I can usually find a good deal on that stuff. The 5.9 is an option but, I like the internal balance of the 5.2 over the external of a 5.9, and I could probably mod the 318 for the cost of a 360 and mods. I'm really on the fence on whether to swap or mod. My 5.2 is at about 140,000 miles, never missed a beat yet. And I have been running full synthetic oil since 70,000 miles, so how much life is left in my 5.2, and how long would it last with mods?
Anywhere from another 1 miles up to another 200,000 miles.

1998 Grand Cherokee Limited

5 speed/NP231 8.8 swap coming in 2010
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post #23 of 39 Old 05-14-2010, 09:54 AM Thread Starter
Fixxxer_ZJ
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Yeah, I do everything I can to keep my engine in tip-top shape. It rarely sees over 3,000 rpm, except when I need to get moving. I do tow with it but I don't try and force it to gain speed when I pull heavy things, so it should have plenty of life then.

1998 5.9 Limited, CAI and Exhaust-My toy
2002 WJ Limited 4.7 HO, QuadraDrive-also mine :D
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post #24 of 39 Old 05-14-2010, 07:11 PM
framanda
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theres a thread on mallcrawlin called the polarbear build thread, or something like that. He swap a 5.3 into what was a 5.9 you might find it helpful
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post #25 of 39 Old 05-14-2010, 10:58 PM
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Pssst... MOPAR "MAGNUM" 5.2L TO 6.4L STROKER KIT (1992-2003)

Add a decent set of heads, kegger mod, krc210 cam and headers and have fun.

"Si Vis Pacem, Para Bellum"

'98 ZJ Limited V8 "Daisy"
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post #26 of 39 Old 05-15-2010, 09:09 AM
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LOL @ all the haters.

The Chevy 5.3 is miles ahead of the 5.2 and 5.9 boat anchors in terms of performance, better construction and far better economy.

Stop being ignorant.

ZJ DD, WW. 4.go litre modded. 3", 31's. Needs armor.
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post #27 of 39 Old 05-15-2010, 07:02 PM
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LOL opinions are like *******s, EVERYONE'S GOT "EM!!! Me myself, i would drive the 318 till shes closer to retirement(140xxx isnt close to retiring yet) and while your driving her save your $$ up for that once in a lifetime deal that always comes up after you've spent the money. Either engine you pick the 318 modded, 5.3 modded or 360 isnt a bad swap. Id stay with the chrysler family though. My .2 cents
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post #28 of 39 Old 05-16-2010, 11:13 AM Thread Starter
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Thats pretty much my plan, to start collecting parts over time and build it one way or another. Thanks for the opinions and such. Either way, I will have over 300 horse at some point, then it will probably blow up the next day

1998 5.9 Limited, CAI and Exhaust-My toy
2002 WJ Limited 4.7 HO, QuadraDrive-also mine :D
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post #29 of 39 Old 05-16-2010, 01:05 PM
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The Polar Bear - 5.3L Chevy Install - MallCrawlin.com Forums

Check this out.

Jamie


Sophomore at Santa Clara University
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post #30 of 39 Old 05-16-2010, 11:34 PM
highlyuncntered
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Quote:
Originally Posted by PaLftr View Post
LOL @ all the haters.

The Chevy 5.3 is miles ahead of the 5.2 and 5.9 boat anchors in terms of performance, better construction and far better economy.

Stop being ignorant.
Nobody was "hating." The whole LSX series are great engines. I had a 5.3 in my '00 Tahoe and my friend Chris has one is his '05 Silverado. We are also in the process of swapping a 6.0l into his '85 k10. We are just saying use what you have instead of trying to make something else fit. Either way you have a v8, and there are only 5 cubes difference between the two. Both can be bada** and he already knows the good old 318 fits without modifying the Jeep.

"Si Vis Pacem, Para Bellum"

'98 ZJ Limited V8 "Daisy"
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