YJ LSx swap
- Thread starter skippy
- Start date
iamsparticus
Take your Rig to the Edge
- Location
- Ogden,Ut
oh man the 2.5L is going away? Forget the V8 you just need a bigger turbo on your 4 banger
iamsparticus
Take your Rig to the Edge
- Location
- Ogden,Ut
oh i see i thought that might be the case since last time i talked to you, you said your keeping it. Id check the internet a little more i found the 4:1 for the NP231 for 900 bucks somewhere or maybe pm tyler with all jeep he might be able to get you a good price
big cherokee
a.r.c fabrication
- Location
- layton
as far as the engine swap goes, what year is the yj , also the motor needs to be newer than the vehicle its going in, all emissions has to be hooked up and working, and to make it fully legal it will have to be inspected by the state to hook it to the vin. i have a 93 vortec in my toy and when it was on the street it was just a tailpipe test so we just ran it as a v6 yota and it passed. but going from a i6 or 4cyl to a v8 is a little tricky since the pick up will read rpm diffrent.
- Location
- Bountiful, land of rocks
I went down to the emissions place on 9thish east about 50th South and quizzed that guy. My knowledge is at least 5-6 years old, but if you've got all the stock emissions junk for the motor, I can't imagine it not being good to go.
rholbrook
Well-Known Member
- Location
- Kaysville, Ut
Do you have some documentation on this? I'm not calling you a liar, I just want proof. I have gone the rounds with Davis County three times.
RockChucker
Well-Known Member
- Location
- Highland
skippy, i'm getting ready to do a 5.3 swap in my TJ as well, so i'll be watching this. i have searched to no avail too. i have talked to the guys up at novak though, and they said they would point me where i needed to go when i get ready to pull the trigger. also, is this ryan? either that or you have the exact same jeep as a guy i went wheelin with out at 5 mile last friday night...
rholbrook
Well-Known Member
- Location
- Kaysville, Ut
I have heard that on the XJ it's a little harder to get it to fit under the hood. Literally, to get the hood closed.
I have a 4.0 out of a XJ on my '86 CJ. To get mine passed I had to have the state do the sniff at their facility in Murry then have my local garage do the safety inspection. Its a pain but its also completely street legal. I was told this was the correct way to go because when the garage does the emissions, the computer has a check list of smog items for the year of the vehicle. Since mine did not have all that old crap I would have failed even though mine is now cleaner than anything built in '86.
TurboMinivan
Still plays with cars
- Location
- Lehi, UT
Call your local Air Quality department and talk to them. Be friendly; get to know them well since they are who will need to approve and sign off on your completed project.
See the 1991 Miata in my sig below? I'm in the process of converting it to a 5.0L V8 out of an '89 Mustang GT. I have my local Air Quality department on speed dial; I call Mark whenever I have a question. He is a great guy and is really encouraging me with my project.
In summary, what he tells me is exactly what Bart told you: all smog equipment on the recipient's original engine must be present on the new engine, and the finished project must pass a sniffer test. Furthermore, this first inspection and smog test will be performed at the AQ location; after that, you'll get a decal and the vehicle can be smogged at any station throughout the state.
More info: my 1.6L Miata was factory built with multi-point port fuel injection and a cat. The injection means my V8 must also be injected; I can't swap to a carb. My donor V8 originally had EGR and an air pump; since my Miata had neither of them, they aren't 100% required... but Mark recommended I retain the air pump as it will help me pass the sniffer test. If I can tune the engine to pass the sniffer without its original EGR, I can leave that off. (Had my Miata been a 1994+ model which had EGR on its 1.8L engine, I would be forced to retain it on my V8. It pays to research your recipient vehicle as well as your donor vehicle before you get started!)
I hope this helps.
TurboMinivan
Still plays with cars
- Location
- Lehi, UT
If you are performing a substantial upgrade smog-wise, you may be able to get a waiver to remove some of the OEM smog equipment. For example, one of my mechanics has an early '80s Subaru BRAT. This car was originally carbureted. For driveability purposes, he decided to upgrade it to multi-point injection... so he took the intake manifold and fuel system off an EFI junkyard Subaru and adapted it all to his BRAT. He then took it to AQ (and spoke to Mark, just as I have been doing) and they verified that the completed project runs clean without some of the OEM smog hardware (either the air pump or the EGR, I forget which). As a result, they gave his car a waiver: it no longer needs that smog equipment.
FYI
When I did the LS1 to my 87 YJ I closed off the EGR system, the secondary air and only ran from 02's and high flow cats. They smog tested it in Utah County shop and it passed the smog test almost as clean as a honda civic. They tested as if it were the original motor, all that mattered is that it ran within the requirements. It just needs the same emissions requirements as the year of the body of the vehicle which was only cats on that year. I previously had a four banger in it as well.
What's he planning on doing for tranny and t-case? Just curious.
What's he planning on doing for tranny and t-case? Just curious.