Conversions & Swaps LSX Engines in Non-LSX Vehicles
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Old 12-17-2014, 05:42 PM
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I decided to start a build thread so I would have a place to ask stupid questions the first one is a Jeep I am building for a buddy. he is having a 408 built by someone that is promising 600hp at the crank. we will see.
specs are 408LS, AX15,Atlas transfer case with 4:1 ratio, Dana 60 front locked with 5.38 gears and a 14bolt locked with 5.38 gears. I 3 linked the front and 4 linked the rear. I am expecting the motor the 22nd. first pic is how it sits now.








the second project is mine. Dana 60 front and sterling 10.5 rear. I have not decided on which gears yet. I picked up a 70k mile 4.8 and a 4l80e with a 241c transfer case for it. my first question is what turbos? I want to run small twins for packaging. I would like to start seeing boost around 1500 and be all in by 5500. this is the test bed for a rock bouncer chassis I am designing and building.

Old 12-21-2014, 04:09 PM
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Why not a blower on the rock bouncer instead of turbos?
Old 12-21-2014, 07:27 PM
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Packaging is my main reason. I can place a turbo wherever the chassis dictates. A blower I would have to build the chassis around. It is also easier to make motor size changes. I can swap in a 408 and change a turbo with very few other changes. A blower is not as easy to adapt for displacement changes. And I am more comfortable with turbos
Old 01-07-2015, 01:38 PM
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finally got the motor for my buddies jeep. now I can get to work.
Callies Compstar crank
callies compstar h beam rods
Cam Motion XA232-375-240-375-12
Kevco road race pan
Trick Flow LS1 225cc heads
Old 01-26-2015, 10:53 AM
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started to get some stuff done. in no order. motor made 577hp and 553tq at the crank







Last edited by Pb Foot; 01-26-2015 at 10:55 AM. Reason: dyno
Old 01-26-2015, 12:37 PM
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Looks good. Tell your friend to start saving $$ towards a replacement transmission.....the AX15 won't last long behind 600hp,

Have you run the sterlings before? That's what I chose for my YJ....haven't installed yet as I got sent overseas but hopefully will get back onto it next year.

Cheers.
Old 01-26-2015, 07:20 PM
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I already warned him about the tranny. My first try with sterling. I have always used 14 bolts but I sure like the brakes. The later model 60s bring the beef.

Originally Posted by Dublin
Looks good. Tell your friend to start saving $$ towards a replacement transmission.....the AX15 won't last long behind 600hp,

Have you run the sterlings before? That's what I chose for my YJ....haven't installed yet as I got sent overseas but hopefully will get back onto it next year.

Cheers.
Old 01-27-2015, 12:32 PM
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Yeah, I've got a D60 for the front to go with the sterling in the rear.
Old 01-27-2015, 12:39 PM
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That 408 made those numbers with those tiny universal headers on it? Very impressive!
Old 01-28-2015, 07:52 AM
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Originally Posted by ctd450
That 408 made those numbers with those tiny universal headers on it? Very impressive!
no. it was dynoed with LTs. these are what fits the swap. I am trying to get my hands on a better header to test fit.
Old 01-28-2015, 08:16 AM
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Nice project.
Old 02-17-2015, 03:13 PM
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more pics on the way

Last edited by Pb Foot; 10-02-2015 at 01:31 PM.
Old 02-23-2015, 02:21 PM
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Originally Posted by Pb Foot
started to get some stuff done. in no order. motor made 577hp and 553tq at the crank






Very nice!!!
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Old 10-02-2015, 01:35 PM
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posting some new pics in no particular order. this will be like watching Pulp Fiction but bear with me.

I welded a -8an steel 90 to the bottom of the stock pick up assembly and built a slotted pick up to try. so far so good.
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Old 10-02-2015, 01:42 PM
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tapped the rear steam holes 1/8 npt and plugged
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tapped the front holes as well and the water pump and used -4 line to vent. I will get a pic soon.

plumbed the 5qt Kevco pan to a remote oil filter located above the skid plate

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trans crossmember has been welded up and painted since.
Old 10-02-2015, 01:48 PM
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random exhaust pictures. still may add high temp wrap.

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Old 10-02-2015, 01:52 PM
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bolt in griffen radiator with YJ specific electric fan controlled by the MSD Atomic EFI.

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built a little storage in the back.

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Old 10-02-2015, 01:56 PM
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underhood wiring pics. I had the alternator converted to one wire operation. I used the stock fuse/relay block for all power and relay needs so far. test drives so far have been interesting. under full power the front end comes up so far (14" of suspension travel) it is taking a little getting used to.

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Old 10-02-2015, 02:34 PM
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You're going to want to solve that problem with the front end coming up under power, not get used to it. It will flip over backwards with any throttle during a steep climb.
Old 10-02-2015, 02:59 PM
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Originally Posted by DavidBoren
You're going to want to solve that problem with the front end coming up under power, not get used to it. It will flip over backwards with any throttle during a steep climb.
I still need to bring the rear up and I am looking at getting the front coil overs tuned. I may have to winch the front end down.


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