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Old 04-27-2011, 10:31 PM   #1
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Supercharger Or Engine Swap?

For power, and to compensate for 14 bolt/dana 60 and 40's.....i know wranglers are bricks on wheels, i know the stock Fuel Economy is nothing special. But i want to get it back to around stock and ill be happy. So smartest way to go?:

1. Supercharge the 4.0L?
2. Golen 4.6L Stroker
3. V8 Swap (ls1, or something...)

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Old 04-27-2011, 10:32 PM   #2
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I know someone is going to say it so ill address it first. "If your worried about gas mileage you shouldnt of bought a jeep or done those mods"
Well....im not "concerned" about it. Last two trucks been on 40's...and got 12 city/14-17 highway depending on driving. I can deal with it being about that. Plus, why would i pick the motor that has 350HP and 9mpg, over a motor with 350HP and 14 mpg? obviously i wanna look into the best option.

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Old 04-28-2011, 01:26 AM   #3
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I've been looking at power options for when my 4.0 goes south. I was looking at a 5.3 lsi swap but lots of expense and modifications. They are supposed to get good mileage though and if I had unlimited funds would go that route. I just started looking at a Titan stroker that makes almost 300 hp and one even more. Same block so everything would move over. Mileage may be worse but really not a major concern. Check out their 4.9 stroker. http://www.titanengines.com/index.ph...dfud772nln4iv3
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Old 04-28-2011, 01:33 AM   #4
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if you have the time consider building up your current engine. The 4.0L is pretty strong and can handle a little overbore here and stroke there. Take your time picking out the best choice to give you the power you want at the price you want. I personally plan to overhaul mine once it poops out(god knows when with only 96k on the clock, maybe another 13 years) Throw a nice centrifugal super on it after upgrading all the internals. And if you just gotta have a V8 then go for it.
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Old 04-28-2011, 01:47 AM   #5
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well im not really concerned with the power...i lied im more concerned with the gas with this jeep. First truck 2005 F150 5.4L Rize industries lift and 40's and got 12 city 14-16 highway, then F350 7.3L diesel 4 door long bed on 40's and got a little better...could easily of gotten 20mpg highway but diesels are too hard to keep off the throttle haha.

So going to this with 14 bolt/dana 60 40's and 4.0L I6 is soooo weird to me. The 4.0L stock gets fine mpg. But now, no, i need to make this jeep get stock mpg or a little better, with the current setup i have. But obvioulsy mpg will come with more power to move it easier.

is there anyway to do a v8 swap with a motor that has active fuel managment to shut down 4 cylinders when not needed, and get a chip or computer for the engine that will allow me to turn it off when i want all 8 cylinders?
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Old 04-28-2011, 01:59 AM   #6
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if MPG is the concern go find a nice turbo diesel to swap in. A gas V8 isn't going to give a big enough gap in MPG to justify the costs. Also proper gearing and if you got the cash a 6 speed transmission with gearing for the speeds you use. A nice tall 0.60-0.50 6th gear for highway cruising at 70mph.
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Old 04-28-2011, 02:09 AM   #7
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turbo diesel ive considered like a 4BT but i cant find ANYTHING on a price range for the complete job!
well i can justify the swap...i think.... cause made 7 grand off getting this jeep...but im using this 7 grand, plus getting another 2600 in 3 months. so i wont be in a loss in anyway....if you see what im saying.

Problem is can i do a swap of any sort besides a stroker swap, for 7-10k? ive found endless swap threads but none that can gimme any sort of cost it took to do these swaps and what not so im kinda lost right now. like ive found ls1/tranny/pcm combos for like 3000 slightly used. but not sure what all else i would need and stuff.
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Old 04-28-2011, 02:40 AM   #8
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I'm kinda in favor of the simplicity of doing the RIPP Supercharger and I like the idea of the 4.0 Stroker.. There just seems to be so much more to do with swaping in other engines that its more headache then nessesary.. But thats all imo
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Old 04-28-2011, 02:55 AM   #9
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i mean im fine with ANY of the options.....just whichever is the best option. If ill get my mpg back with a stroker or supercharger just as much as i would with a v8 swap then obvioulsy ill do that.

eeehhh....im not a fan of centrifigul superchargers...well nothing against them i just like roots twin screw better.
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Old 04-28-2011, 10:20 AM   #10
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eeehhh....im not a fan of centrifigul superchargers...well nothing against them i just like roots twin screw better.
you could do a newer 5.7 hemi swap and it would still be smog legal (if you care). The new 1500 Ram gets 14/20 with 390hp and 407ft-lb. I like PD blowers better too
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Old 04-28-2011, 10:42 AM   #11
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Quote:
Originally Posted by patshea098
For power, and to compensate for 14 bolt/dana 60 and 40's.....i know wranglers are bricks on wheels, i know the stock Fuel Economy is nothing special. But i want to get it back to around stock and ill be happy. So smartest way to go?:

1. Supercharge the 4.0L?
2. Golen 4.6L Stroker
3. V8 Swap (ls1, or something...)
Supercharger - should use more gas but you will go faster

Stroker - if you are dealing with heavier tires and equipment then this will help but it gets a bit complicated on fuel injection/ecu depending on which year your jeep is and can be just as costly as option 3

350 swap - the engine will have more power to to push taller gears at lower rpms effeciently. Same reason my tahoe gets better gas mileage than my jeep. The set up you run is of massive importance and you would have to keep you foot off of the skinny pedal.

Option 4 - not sure of your set up but if you have geared extremely low then going with a numerically lower gear ratio may help, but crawling would suffer, least costly of all of the options though.
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Old 04-28-2011, 11:09 AM   #12
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i vote stroker if you want to keep the stock look & all stock accessories. make sure you do your homework tho. you'll likely need 91+ octane for the stroker...depends how you build it tho.

i vote v8 if you want mileage, want to run regular octane and don't mind completely swapping out everything drivetrain & accessories. a swap is a big undertaking.
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Old 04-28-2011, 11:37 AM   #13
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I talked to the folks at Titan and if you go with the 4.9 stroker and 315 hp, it can be built to run on 87 octane with no problems...the 4.6 cannot. At $4k it's expensive but considering it will run with my current setup...almost...it's an option I am really looking at. Wish I could talk to someone who has the 4.9. I'd love to hear what 315 hp is like on a TJ and what kind of mileage they get.
I had been considering the LS1 swap, but it is more than twice as much and less hp. (5.3l)
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Old 04-28-2011, 03:21 PM   #14
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my setup is 2005 tj x with 14 bolt rear and dana 60 front on 39.5 tsls.
5.13 gearing
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Old 04-28-2011, 03:38 PM   #15
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Quote:
Originally Posted by patshea098
my setup is 2005 tj x with 14 bolt rear and dana 60 front on 39.5 tsls.
5.13 gearing
Gas mileage...don't anticipate any improvment.
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Old 04-28-2011, 03:44 PM   #16
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like i said just want my setup now=stock 4.0L gas mileage......i think that is very reasonable....and i believe thats good gas mileage considering whats being driven.
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Old 04-28-2011, 06:26 PM   #17
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If you want fuel mileage buy a hybrid! Why would you want that big a tire on a dd ? The v8 swap will be the best thing you can do for your mileage and power! The hemi swap will be your best bet
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Old 04-28-2011, 07:00 PM   #18
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If you want fuel mileage buy a hybrid! Why would you want that big a tire on a dd ?
I think we all know the answer to that question.
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Old 04-28-2011, 08:39 PM   #19
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Quote:
Originally Posted by patshea098
like i said just want my setup now=stock 4.0L gas mileage......i think that is very reasonable....and i believe thats good gas mileage considering whats being driven.
My only guess on what you can do here is to go with some type of diesel.
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Old 04-28-2011, 09:08 PM   #20
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computeruser and rda....you obviously dont get that im not saying i want good gas mileage. i want good gas mileage for what im driving...which i find is 15 and reasonable as that is what i have been driving with past two vehicles ALL on same sized tires.

So im going to look into LS1 swap, 4BT swap, Hemi, or see if i can get a engine with a active fuel managment system with a 2 position chip to where one position turns the AFM off so all 8 cylinders will always be used.
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Old 04-28-2011, 10:22 PM   #21
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4bt is the way I'd go. If u shop around long enough, u can find a good deal. For 7 grand and enough time, I'll install it myself and come out way ahead. If u want more power, and loot ain't an problem, throw a 5.9L Cummins in it. All the power u want and plenty of gas mileage.
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Old 04-28-2011, 11:07 PM   #22
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well....10K is about my budget....ive found some deals on 4BT's....but i dont know what all else i need?

What will help me the most is.....what am i looking at labor wise for a swap to be done...then i can shop for parts with that budget and figure out the route to go.
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Old 04-29-2011, 04:08 PM   #23
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no one has answered me about a active fuel management engine. would it be possible to do that? and have a switch to turn off the active fuel management?
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Old 04-29-2011, 04:31 PM   #24
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im not sure on wether that kinda of engine has been attempted on a wrangler but I'm betting it has been tried before .. So BUMP for Pat hopping someone can help him
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Old 04-29-2011, 06:15 PM   #25
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i mean i dont see why it couldnt be done? i mean obviously the ECU knows at certain speeds at certain RPMS to turn 4 cylinders off. So i dont see why a program couldnt be written that just simply over rides that or turns off that feature in the ECU by a flip of the switch. I am sure plenty of people with vehicles with those engines have modified their engines and wanted this off so im sure a company has made it before.

so can anyone tell me a motor that has the Active Fuel Managment that will fit in a TJ? then i can go to forums and companies that write performance programs for those engines and ask them if they could make it for a TJ.
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Old 04-29-2011, 06:28 PM   #26
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Quote:
Originally Posted by patshea098
i mean i dont see why it couldnt be done? i mean obviously the ECU knows at certain speeds at certain RPMS to turn 4 cylinders off. So i dont see why a program couldnt be written that just simply over rides that or turns off that feature in the ECU by a flip of the switch. I am sure plenty of people with vehicles with those engines have modified their engines and wanted this off so im sure a company has made it before.

so can anyone tell me a motor that has the Active Fuel Managment that will fit in a TJ? then i can go to forums and companies that write performance programs for those engines and ask them if they could make it for a TJ.
My 09 tahoe has it, 5.3 vortec. The only time it kick into 4 cyl is when its not under load such as slowing down or going down hill.
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Old 04-29-2011, 06:42 PM   #27
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what about cruising on the highway? seems like a time it would shut down.

found some Dodge 318's and 360's remanufactured for less then $900, probably can find the tranny for it also. Or could the 42RLE handle either of those motors just fine?

REMEMBER: my budget is 7-10K....any other motors yall think i could do a swap with with that budget?
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Old 04-29-2011, 07:11 PM   #28
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Seeing as the 5.3 Chevy is one of the popular swaps for TJ's based on research.. Im guessing there wouldn't be any issue with doing a 5.3 with the fuel managment system for a swap.. As to Trans and even T-cases to use with the swap.. perhaps this thread will help u some with what you can use on that swap.. now alls u got to do if you go with the 5.3 with a.f.m is find one for a decent price.. Here's a thread that might be able to help you somewhat I hope 5.3 Jeeps - Pirate4x4.Com Bulletin Board
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Old 04-29-2011, 09:40 PM   #29
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thanks xj knight! ill do some reading and see what i can find. i know the 5.3L is a popular choice, i just know most everyone choose the year engine that didnt have the AFM. but ill see what i can find.
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Old 04-29-2011, 09:53 PM   #30
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There are a bunch of GM engines that go into cylinder shut off. Its not nearly as simple as having a switch. They alternate what cylinders turn off so they don't build up any crud in them. You can't just "make a program" in the ecu. Much of the operation is hard coded and you can only change the parameters stored in the rom. (Ok, maybe the oem engineers could do this, but there is no aftermarket option). You can probably change when the cylinder cut off kicks in with ecu tuning.

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