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Old April 30th, 2013, 02:26 PM   #1
Dannn
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Default LS/GM Swap Questions/Build

Just getting everything ironed out for my swap soon here...

98 TJ 2.5 auto bone stock
01 LQ4 from a Yukon Denali
4l65E from same Yukon
NP231J

How/What did you use for your fuel lines? I like the idea of tapping the tank. I have a return style motor, 3/8 feed and 5/16 return. You guys use hose? Or steel line? I have the hydraulic flaring tool to make the quick disco fuel line flares. Anyone have part numbers or a list?

Planning on using the AA mounts, and AA 231J adapter that replaces the input with a 27spl piece. Anyone do this easier? I already tried the whole tear a chevy case apart. I can make it work, but the chevy case i had was a 233C electronic shift. No thanks. I have both the 5 bolt-6bolt hex and 6bolt-6bolt hex adapters for the trans. Also grabbed the 40t reluctor and speed sensor from a case i had.

Anyone able to use stock truck manifolds? I pondered the idea of cutting them and turning them inwards but that just sounds hillbilly.

Driveshafts... Was anyone able to reuse their stock shafts? (Explanation at bottom)

Anyone able to fit one of these into a stock height TJ? (Again, explanation at bottom)

I've read the 5.3 jeeps thread on pirate pretty much completely. So much information that i've forgot some things.
I don't know a damn thing about the different fittings (IE -6AN etc.) so thats the part that confuses me, especially when dealing with adapters for AN to pipe thread etc.

The Jeep is a weekend build type deal. All being done in an auto shop that must operate monday-friday so i can't make a big mess, and leave it in the shop.

My plan is to pull the 4cyl on a friday night, set the 6.0 in saturday, and have the remaining saturday/sunday to plumb fuel lines, hook up harness, install everything else that needs to be done. then the following weekend do the 8.8 swap, lift, tires etc. then 3rd/4th weekend paint it.


Anyone got any answers for me?
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Old April 30th, 2013, 02:56 PM   #2
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I think the lines coming out of the tank might be the right size, but the in tank regulator is too low of pressure. Novak makes a drop in setup to use the in tank module, with the correct fuel pressure.

On mine, I was just going to gut out the regulator, and use a corvette filter/regulator combo, but I've switched from my TJ frame, to a narrower frame, so I'm going to need something different. I might go with one of these: (Pricy ... I need to support about 550 crank hp)

http://aeromotiveinc.com/products-pa...h-fuel-system/

I might also just run an external pump, since I'm not running any hills with my Jeep.

For the fuel lines, I did/will go (had a 5.3 installed in my CJ8, never finished it. Installing an LS2 into my CJ6) with -6 braided line from the tank to the corvette filter/regulator. Hard steel lines from the filter to the firewall, and then to -6 braided line to the fuel rail. Used stock quick disconnects at the rail and filter. That stuff is all going into the CJ6. You spend a bit on the AN fittings, to get to quick connects. You can buy pieces of 3/8 and 5/16 with the quick connect flares on them, and then cut and reflare them, or use a compression fitting. I put the AN flare nuts onto the 3/8 hard line for connecting the AN hoses.

On my CJ, the truck manifolds wouldn't fit. Yjs have the most space. TJs, it really depends on the manifolds. If they don't fit, look for stock 2010+ Camaro take-offs, they are pretty tight to the block.

I would go the other way, do the lift first, then the engine. That is a VERY tall order to swap that all in 1 weekend, especially with the trans swap, too. I don't see that feasible/reasonable unless you've done a couple before.
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Old April 30th, 2013, 03:37 PM   #3
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The stock truck manifolds will work. As long as you use AA mounts
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Old April 30th, 2013, 04:37 PM   #4
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stock fuel line on the GM vehicle are the plastic stuff i think.
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Old April 30th, 2013, 07:10 PM   #5
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You need a 60 psi pump. Many have tried external but find that an in-tank is the way to go. I used high pressure hose. Simple and easy. (I have an 03 Denali LQ9 in a YJ) I also used the factory fuel regulator and filter with a return line.

I have no input on motor mounts or the time to do the swap but I think you are optimistic to do it in a weekend. I used the truck manifolds but again, it's a YJ.
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Old April 30th, 2013, 09:18 PM   #6
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Quote:
Originally Posted by Haggar View Post
I think the lines coming out of the tank might be the right size, but the in tank regulator is too low of pressure. Novak makes a drop in setup to use the in tank module, with the correct fuel pressure.

On mine, I was just going to gut out the regulator, and use a corvette filter/regulator combo, but I've switched from my TJ frame, to a narrower frame, so I'm going to need something different. I might go with one of these: (Pricy ... I need to support about 550 crank hp)

http://aeromotiveinc.com/products-pa...h-fuel-system/

I might also just run an external pump, since I'm not running any hills with my Jeep.

For the fuel lines, I did/will go (had a 5.3 installed in my CJ8, never finished it. Installing an LS2 into my CJ6) with -6 braided line from the tank to the corvette filter/regulator. Hard steel lines from the filter to the firewall, and then to -6 braided line to the fuel rail. Used stock quick disconnects at the rail and filter. That stuff is all going into the CJ6. You spend a bit on the AN fittings, to get to quick connects. You can buy pieces of 3/8 and 5/16 with the quick connect flares on them, and then cut and reflare them, or use a compression fitting. I put the AN flare nuts onto the 3/8 hard line for connecting the AN hoses.

On my CJ, the truck manifolds wouldn't fit. Yjs have the most space. TJs, it really depends on the manifolds. If they don't fit, look for stock 2010+ Camaro take-offs, they are pretty tight to the block.

I would go the other way, do the lift first, then the engine. That is a VERY tall order to swap that all in 1 weekend, especially with the trans swap, too. I don't see that feasible/reasonable unless you've done a couple before.
Thanks for the info. Looking for a lift now. How tall are most going? I really wanted to keep this thing low, already gonna run a 1.25" BL to clear the manifolds and give myself some room. Was kinda hoping to keep the overall lift under 4" because i only plan on running 33's.

I'm pretty quick with this type of stuff, never done a motor swap into a jeep though. i've helped out on quite a few medium and heavy duty swaps. (semis and such) However i'm not sure if i will get it all done. Just a goal i'm aiming for. I'll end up working on the thing from 8am til midnight/1am then come back on sunday at 730-8 and work til 10-11 so i've got some hours. Plus i have more volunteer help than i know what to do with... i'd say 10 people have already called me and told me they'd come help all weekend. we'll see...


What filter did you use on your swap?
Quote:
Originally Posted by shoey View Post
The stock truck manifolds will work. As long as you use AA mounts
Awesome, advance said they would, but i still haven't found anyone who's made them work which made me a little leery.

Quote:
Originally Posted by skife View Post
stock fuel line on the GM vehicle are the plastic stuff i think.
The yukon i pulled the motor from had plastic from tank to hard line on rail, then into a filter, out of the filter was braided to jump from the frame to tcase, then hardline up to the motor where it switched to rubber/braided with quick discos. they just threw everything on this setup eh?

Quote:
Originally Posted by whiterhino View Post
You need a 60 psi pump. Many have tried external but find that an in-tank is the way to go. I used high pressure hose. Simple and easy. (I have an 03 Denali LQ9 in a YJ) I also used the factory fuel regulator and filter with a return line.

I have no input on motor mounts or the time to do the swap but I think you are optimistic to do it in a weekend. I used the truck manifolds but again, it's a YJ.
Is the LQ9 returnless rail? i know the vette setup allows you to do that, but i have a regulator on the rail with a return. I'm gonna run the stock jeep pump in the tank, cap off the regulator, and tap the sending unit and run a pump line up for pressure and return. just didn't know what fittings to go with.
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Old May 1st, 2013, 07:42 PM   #7
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I used AA engine mounts, manifolds fit fine. camero fuel pump in tank works just fine 110$ thru summit. this will not be a weekend job however.
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Old May 1st, 2013, 07:51 PM   #8
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lucky with 2.5 you won't have to deal with the pillow block.
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Old May 1st, 2013, 08:34 PM   #9
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Quote:
Originally Posted by shoey View Post
lucky with 2.5 you won't have to deal with the pillow block.
that was actually my next question... good.

probably just gonna order the AA mounts and run a 231c or 241c... don't really see the need for buying a 500 dollar adapter when i can get a chevy case that'll work for 75 bucks.
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