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Old Sep 28, 2019 | 05:48 AM
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Default Torque & Power & Jeep

We have our shop Jeep that’s getting swapped to an LS. I’ve gone over this 100 different ways but if you wanted to build a motor with low RPM torque that was still a blast to drive on the highway, never driven over 150ish miles at a time unless on a trailer AND on 40” tires, how would you do it? N/A? Supercharged?

Was originally going to put a 5.3 in with a maggie, then thought maybe a big cube LSX 454 might be better for torque and power, now I’m starting to rethink that...
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Old Sep 28, 2019 | 08:11 AM
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What’s the budget? That will help narrow it down. A LY6 w/ a Maggie would’ve good. A n/a LS3 stroker would be nice. If ya have a Maggie Aall ready, Toss it o. A LS3 stroker. It all depends how much money you feel comfortable spending
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Old Sep 28, 2019 | 10:18 AM
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I would do a 383 with AFR 205 heads and a 224/230 cam
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Old Sep 28, 2019 | 10:55 AM
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I like the 383 with AFR/TFS 205 Heads.

I would go with a smaller cam... JFR Isky 218/218 .570"/.570" 112 Cam.

It's a torque monster in 6L and the added stroke will just make even more low-end biased.
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Old Sep 29, 2019 | 05:26 AM
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Budget is about $12,000

i think I want to stay in the 400+ ci area. Jeep goes to a lot of shows, needs to be more on the radical side but still able to wheel it.
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Old Sep 29, 2019 | 07:46 AM
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Then do anything. Not being snarky. Once you get over a certain number you stop paying for cubes. Shafiroff racing has a LS454 short block for 6k. Thing is all the dress up parts. Now when you do big cube LS you will have torque. That part is easy.

If it were my Jeep and I wanted to stay 400+, I would do a Texas speed 408, cathedral heads like Mamo 235, TFS 235, mild cam, long runner fast 102. You got to budget for the swap stuff too such as headers and likely some custom work to it hooked up, controller is easy but harness may end up being fun. Plus getting all your gauges running. Driveshaft, Brackets, etc.

It ended up in total costing me 10k to LS swap a S10. I paid 1200 for the motor, trans, and harness. So if your budget is 12, a good chunk of that will go to just getting the motor in and running.
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Old Sep 29, 2019 | 08:24 AM
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Originally Posted by Darth_V8r
Then do anything. Not being snarky. Once you get over a certain number you stop paying for cubes. Shafiroff racing has a LS454 short block for 6k. Thing is all the dress up parts. Now when you do big cube LS you will have torque. That part is easy.

If it were my Jeep and I wanted to stay 400+, I would do a Texas speed 408, cathedral heads like Mamo 235, TFS 235, mild cam, long runner fast 102. You got to budget for the swap stuff too such as headers and likely some custom work to it hooked up, controller is easy but harness may end up being fun. Plus getting all your gauges running. Driveshaft, Brackets, etc.

It ended up in total costing me 10k to LS swap a S10. I paid 1200 for the motor, trans, and harness. So if your budget is 12, a good chunk of that will go to just getting the motor in and running.
My budget was 12, on the motor alone. Already have everything else.
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Old Sep 29, 2019 | 06:08 PM
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Go to HPR and get a 468. Have them use some LS3 heads and spec a cam for that. Or just get the LSX454 longblock and swap a different cam in there.
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You didn't mention overall vehicle weight, axle gears, and transmission/transfer case.

What kind of wheeling do you want to do with it, what's more important to you, off idle crawling, or wheel speed?

I think either of the paths listed above would be fine.

For an automatic, torque converter selection is critical. IMO, true low end torque was rarely an issue in all my days 4 wheeling. Improper gearing and lack of horsepower were the usual issues. (Like trying to push 44s with a TH400 and 4.10s, when better gears would have helps more) I know plenty of people who wheel stock or mild 6.0s with 40s that don't have any problems with the torque they have.

I think an LY6 with a blower would be more fun, and if you want a truck that's noticed/remembered, then the sound alone of blower whine wins out. But a cathedral port stroker with a small cam would work great in an otherwise well matched rig. This would be my key factor. The style of wheeling also comes in to play, headlights deep mud, I might not want a serpentine belt drive supercharger.

I have an LQ4 in my GMC, with a 223/231 cam, and a 3200 stall converter. I have no issues with transmission heat, but I have a 3.06 first gear, and 4.56 gears (With 33s). I have been asked about low end, and there's no such thing. There's no case where my truck is at heavy throttle and 1200 rpm. I think as long as you have well matched transmission/t-case/axle gears, and stay mild on the cam, you'd be good either way.
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