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Topic Review (Newest First)
04-16-2014 07:33 PM
5 speed Interesting fellas. Lets not kid ourselves here; putting a turbo or a supercharger on a 6 cylinder is never going to equal a V8 in across the board power, nor was the 6 intended to support the load that one of these is going to give it. Motors are always better when they are left stock; just need to get one big enough to do the job.

I have had 3 hemis, have an Aspen with a Hemi and Ram crew cab with a Hemi at the moment (and an LJ). I'll take the truck Hemi any day. Put it and the tranny in a 4 door JK for sure. Only way I would own a Jeep as my daily driver. I need it tow a trailer from time to time and be able to load it down with stuff. The Crew Cab moves out quite nicely, dont really need any extra power.

I emailed Chrysler; still not interested or unable to put the V8 in there. So I need to go aftermarket.

i have had 8 Jeeps, 2 CJs, a YJ, TJ, XJ, ZJ (with a factory 5 speed), a WJ have an LJ now. After driving a '13 wrangler as a rental, it drives so good it could easily be my daily driver; except that pitiful engine in it. So, my plan in a couple of years is to find one used, maybe with some defect like the heads where someone kept driving it and the engine is fried and drop the Hemi in there and maybe by then an 8 speed tranny. I thought I was going to do that to the LJ but the difference in how they drive is incredible. If you started out like me, with a 77 CJ7 Golden Eagle (with a built 304) and add a leafs, you can really appreciate how far Jeep has come.

If they could build it, doesnt matter if it was 70K, people would buy it, trust me on that. Look at all the ridiculous overpriced sedans out there or the special edition mustangs and Chrysler SRT products.
04-13-2014 12:58 PM
m998dna
Quote:
Originally Posted by mike1158 View Post
At best i could see them giving a warranty on the motor, if it's a "crate" but i can't see them backing an axle if you waste it, or your tranny if it goes south....
If he's talking about a 3.6L Wrangler then the NAG1 auto trans can withstand 500HP in stock form.

I don't see a 5.7L Hemi ripping out Dana 44's and a NAG1 transmission unless you take it to the drags and run locked in 4 Low ... with slicks on all four corners and you don't stage the Jeep correctly.

The worst that will happen is you will snap a drive shaft or two.

.
04-13-2014 12:33 PM
Mad-Mudder
Hemi swap

Quote:
Originally Posted by allison.kylie View Post
Yeah... But im gunna tell u now its not 4-10,000 job. If you look around an find the very few people that have them an did them right an the jeep looks like $100000 not a thrown together mess theyll tell u your way off with the price. I mean the one guy just said the motor was $2500 to buy a really nice jeep yet tooo depending on the year pretty much nothing under $8000 an then the conversion stuff which i found were between $4500-$6500 an then you have to make the computer match the motor which is a lot an you need to get the title to match the jeep an the motor
I'll put a Hemi in a TJ and warranty it for $10.000.oo .. I've done 2 Hemi swaps so far One in a 01' Dakota quad cab and never got close to $10.k . Both looked like the trucks came from the factory with Hemi's..Check Dodgeforum.com and go to Dakota Hemi Swap with pics.. I'm looking for a 5.7 Hemi for my TJ now.. IMO it's one of the best swaps you could do..
05-22-2013 06:31 AM
allison.kylie Yeah... But im gunna tell u now its not 4-10,000 job. If you look around an find the very few people that have them an did them right an the jeep looks like $100000 not a thrown together mess theyll tell u your way off with the price. I mean the one guy just said the motor was $2500 to buy a really nice jeep yet tooo depending on the year pretty much nothing under $8000 an then the conversion stuff which i found were between $4500-$6500 an then you have to make the computer match the motor which is a lot an you need to get the title to match the jeep an the motor
05-21-2013 10:30 PM
MI JeepSkate i found a 2012 5.7 engine and trans with 10,000 miles out of a ram 4x4 for $2500 and the guy will deliver for free. however, with that purchase and the AEV kit id be flat broke. i hope i get a promotion soon!
05-21-2013 09:49 PM
badboydeafjeep
Quote:
Originally Posted by BenHedrick View Post
I LOVE my 6.4L HEMI in my JKU Rubicon. And it is neck snapping fast...

I also have had a 5.7L and a 6.1L JKU both were awesome too. The 3.8 is way inadequate for a JK Wrangler, the new 3.6 is MUCH better and with a supercharger on the 3.6, I bet it would be AWESOME too!

I vote got Going For It!!!
Cool looking engine u got !!! How many hp u got out of it ??? Pretty sure it lot !!
05-21-2013 06:43 PM
BenHedrick I LOVE my 6.4L HEMI in my JKU Rubicon. And it is neck snapping fast...

I also have had a 5.7L and a 6.1L JKU both were awesome too. The 3.8 is way inadequate for a JK Wrangler, the new 3.6 is MUCH better and with a supercharger on the 3.6, I bet it would be AWESOME too!

I vote got Going For It!!!

05-21-2013 03:43 PM
badboydeafjeep If u only willing throw alot $$$ around jeep no matter what years is it it ur $$ to spend it everyone different idea of how to build their jeep,,
05-18-2013 11:37 AM
WatchThis!
Quote:
Originally Posted by utjdh04 View Post
I drive reasonably sane on the road and like to fashion my off-road driving style referred to by the late Granville King (look him up if you don't know who that is) as 'driving elegant'. Spinning tires means lost traction.
So what do you do on extremely loose trails or ones that have mud on them? Do you not even attempt them since you know you will have to spin the tires on them? What happens if you travel somewhere to wheel and it rains, do you just stay off of the trails?

There are lots of different types of trails and in lots of parts of the country even a tube buggy with sticky tires have to spin them to make it up things. To me if someone only wheeled in spots where the tires never spun they would be limiting them selfs on where they can wheel.
But at the same time if you only wheeled in places with great traction this is a great mindset.
05-18-2013 11:17 AM
badboydeafjeep Bump,,,,,,,,,
05-10-2013 10:20 PM
badboydeafjeep Worry about how spend $$$ ,,, how that lot less doing all change all u need is golen engine long block it got 350 hp in it while u add new parts on it might be add more hp out of it,,,,
05-10-2013 10:33 AM
utjdh04 My JKUR is probably pushing 5,000 lbs. with the bumpers, skids, wheels & tires. The 5.7 Hemi is the same one used in a Ram pick-up. It's not a neck-snapper by any means, but it will get you down the road. I drive reasonably sane on the road and like to fashion my off-road driving style referred to by the late Granville King (look him up if you don't know who that is) as 'driving elegant'. Spinning tires means lost traction. Speed breaks things. Do I need a V-8 Hemi in low range? No way. But, it drives so well and has so much more torque that the 3.8 slug that it drives far better slow and controlled in the rocks.

As for warranty issues other than drivetrain, my dealer has replaced the sway bar disconnect three times now. At $1100 - $1500 a pop, that's pretty significant. I was assured that if anything went south with the transfer case or front/rear ends that there shouldn't be any problem covering those under warranty, either.
05-10-2013 07:22 AM
allison.kylie Just to let you know too, the person on the first page said it would be about $10,000. The guy that built mine and others that I have seen that you could trust to drive them from PA to CA and back 10 times costed them around $40,000 if not more. I mean just think about it to get a nice jeep with low miles your gunna pay atleast $10,000 (depending on the year) Then you need to find just a hemi motor or the whole car/truck with low miles. Thats gunna be, I am really not sure out of the junk yard $2,000???? or more, not sure. Then all you have is the jeep and the motor. You still need to get all the wiring and conversion stuff. And then you need to make sure the computer matches with the motor. It is really confusing when the guy told me about it, I know I would never have enough patients to do it. I am just letting you know, not trying to start any fights or anything
05-09-2013 11:55 PM
badboydeafjeep Cool i just look up crossfire engine srt-6 they do have it , hp is 330/ tq310 in it intersing ,,,,,,,,,
05-09-2013 11:33 PM
jkjeeper06
Quote:
Originally Posted by badboydeafjeep View Post
Or would be cool if they make I-6 SRT engine ?? Would that be awesome for it ??? Can i dream it would be happened !!!
Pretty sure there was an SRT-6 in the Chrysler crossfire. I'm not sure if it was just suspension and those types of upgrades but it may have had a better engine
05-09-2013 10:39 PM
badboydeafjeep Or would be cool if they make I-6 SRT engine ?? Would that be awesome for it ??? Can i dream it would be happened !!!
05-09-2013 09:15 PM
allison.kylie
Quote:
Originally Posted by ImSickofSnow View Post
As some of you know, I became a salesman at a jeep dodge Chrysler dealership and that I'm looking to get a wrangler, whether on this site or not I've been doing a ton of research on wranglers and am really interested in the 5.7l hemi swap. Has anybody done it? Is it worth it? Obviously I know gas will be even worse but what are the pros and cons of this? Remember that this wrangler will be mainly a daily driver.

hey just to let you know i have one for sale. it gets about 15-20 mpg no lie! it is actually really good! i love it! attached is the link to my ad:

http://www.wranglerforum.com/f139/19...ml#post3722210
05-09-2013 06:18 PM
TOK
Quote:
Originally Posted by nectoxicdragon View Post
Well said but one slight error, it's not gearing, it's torque. Gearing is only used to allow the engine to operate in it's (supposedly) peak torque range. but you have the right idea.
Perhaps I should have elaborated more, but I said gearing because I was thinking of stuff like the early Go Devil 4 bangers. The Willy's Jeep would go through just about anything with 60 horsepower and 105 lb ft of torque.

That was actually considered the High Powered engine when it came out!
05-09-2013 04:32 PM
kldavis722 I usually laugh at customers who ask about hemis and tell them you get either the wrangler OR the hemi. For what and how the wrangler is designed, a hemi just doesn't make sense. You wanna go that big buy a truck or build a buggy; a wrangler isn't for you. The wrangler has evolved into the JK for a reason and as soon as they try and start building them with hemi chrysler will get more crap about selling out over lost wheeling performance to satisfy the "popular" market like the 2 wd wranglers in 07 and the 3.8.

Message to the original poster: love what's on your lot. Don't discount factory performance or you'll never make it in the industry. Buy a wrangler and leave it stock. Find a local group and learn how to wheel and you'll be surprised at what a stock wrangler can do.
05-08-2013 07:15 PM
nectoxicdragon
Quote:
Originally Posted by utjdh04 View Post
I have the 5.7L in my '08 Unlimited Rubicon. Cost me over $20K, but I had the work done by Screamin' Lizard Customs in Bedford. It's a crate motor with a 54RFE trans, and I couldn't be more pleased with how it runs. I didn't want to go with a bigger motor. Don't need it. The 5.7 has plenty of power on and off road. It drives just like the Jeep should. The 3.8 was a slug after I put 35s on it (even with 4.88s), and front/rear AEV bumpers, skidplates, etc. It was OK in 4-Lo on the trail, but on the road, it was downright dangerous. Now, it's a true pleasure to drive. Mileage? Horrible, but about what I got with the 3.8 after lifting it and adding all that weight - 11-13 mpg. Economically advantageous? No way. But, it's so dang much fun to drive with that V-8 rumbling under me, it was worth every penny. I've had it over a year now, and the dealer has covered warranty issues not directly related to the motor/trans. If you've got the opportunity to do such a swap, I'd say you'll not regret it. I haven't.
WHAT warranty issues are left after you eliminate the drive line? burned out glove box light?
05-08-2013 07:10 PM
nectoxicdragon
Quote:
Originally Posted by ohioviper View Post
For a DD the Diesel would be superior.More torque to get you moving and better fuel economy.For a trail rig not so much. Deep mud and rocks require quick rpms to get up on top or over.A Hemi will turn the tires quicker and faster with a wider rpm range not needing a gear change.Where a Diesel is slower to come up on rpms and limited max rpms needing a gear change loosing momentum.
Not true. this is a been there done that... the speed of high horse engines is a major detriment. Spinning tires do NOT offer traction they lose it, Tires are not propellers on a boat. Torque and ONLY torque is what moves a vehicle through rocks and mud. mud requires the right size tires and clearance and again torque to turn them. Start spinning tires on rocks and you start sliding. Low speed torque in both instances.
05-08-2013 07:03 PM
nectoxicdragon
Quote:
Originally Posted by TOK View Post
Because what a Jeep does has never been about horsepower, its about gearing. The Pentastar already has more power than anything they've ever offered in the CJ/YJ/TJ/Wrangler platform.

Its a horrible vehicle for 400+ horsepower... Short wheelbase, high center of gravity and mushy suspension. The fact the OP is trying to have a swap like this "make sense" tells me he's doing it for all the wrong reasons. The Hemi swap is something you do for the pure crazyness of it.

I'm sure AEV does it right, but the V8 brings other potential issues... My buddies Chevy 350 YJ overheats on the really slow trails, even with a 4 core radiator and electric fan.
Well said but one slight error, it's not gearing, it's torque. Gearing is only used to allow the engine to operate in it's (supposedly) peak torque range. but you have the right idea. For decades buick engines were the best choice due to the lower speed peak torque output, then GM developed the "corporate engine philosophy" and the buick 350 died off. what you really want is a low cylinder count high displacement engine, with a long stroke and large bore... Gee that almost sounds like a built 258 or a bored and stroked 4.0... well thanks to emissions regs in many states the 258 is almost out of the question. bringing you back to the 4.0... Also once you go beyond the weight of a 6 you start running into additional issues that pop up, that are not so simple to deal with. EVERY vehicle is a balance of it's components. you change that balance, in this instance the actual weight, you start running into other handling issues which include trailability. In short there is a reason thoroughbreds are not used as draft horses...
05-08-2013 07:02 PM
positrak From what I have gathered, the actual sole reason they don't offer it from the factory is safety regulations i.e. crash testing. These things barely fit inside the engine bay in fact previous install kits required hammering in the firewall to make them fit. I don't know the intricacies of the regulations whether you need to have x inches clearance around an engine in a vehicle in order to get certified, but crow-barring in a massive engine into a tiny engine bay and not being "approved" makes sense to me.
05-08-2013 05:52 PM
ohioviper For a DD the Diesel would be superior.More torque to get you moving and better fuel economy.For a trail rig not so much. Deep mud and rocks require quick rpms to get up on top or over.A Hemi will turn the tires quicker and faster with a wider rpm range not needing a gear change.Where a Diesel is slower to come up on rpms and limited max rpms needing a gear change loosing momentum.
05-08-2013 04:58 PM
HK_Runner Well, the motor is not exactly one to go into the history books but if new heads are also frying, I am pretty perplexed by Chrysler's inability (or unwillingness?) to fix this issue once and for all. Maybe they should just use someone else's motor.
05-08-2013 04:47 PM
RMrOdGy
penstar motor crap

I don't know if any of you are having the problems I am, but two head replacements later, I think Jeep wranglers have a major problem in the "new" penstar motor! So I think they would opt to switch out the motor for you. In my case, when the head goes out a third time, I get to claim lemon law, I just hope they don't try to replace it with another Penstar motor. just saying


Quote:
Originally Posted by mike1158 View Post
Really ? ? ? Chrysler is going to warranty pulling the 3.6 out of a brand new (and i assume it'll be brand new since your talking about warranty) Wrangler..and putting in a "Crate" 5.7 HEMI ? ? I 'd be shocked if this is true. I'm not trying to doubt you but really... why? Why would Chrysler warranty this?
At best i could see them giving a warranty on the motor, if it's a "crate" but i can't see them backing an axle if you waste it, or your tranny if it goes south.
And you also said "I'd rather have the motor installed by the factory".. are you saying you are working on a plan to have this thing roll off the line with the HEMI in it? You must be one HELL of a salesman to have that kinda pull with Chrysler.....
05-08-2013 01:27 PM
utjdh04 I have the 5.7L in my '08 Unlimited Rubicon. Cost me over $20K, but I had the work done by Screamin' Lizard Customs in Bedford. It's a crate motor with a 54RFE trans, and I couldn't be more pleased with how it runs. I didn't want to go with a bigger motor. Don't need it. The 5.7 has plenty of power on and off road. It drives just like the Jeep should. The 3.8 was a slug after I put 35s on it (even with 4.88s), and front/rear AEV bumpers, skidplates, etc. It was OK in 4-Lo on the trail, but on the road, it was downright dangerous. Now, it's a true pleasure to drive. Mileage? Horrible, but about what I got with the 3.8 after lifting it and adding all that weight - 11-13 mpg. Economically advantageous? No way. But, it's so dang much fun to drive with that V-8 rumbling under me, it was worth every penny. I've had it over a year now, and the dealer has covered warranty issues not directly related to the motor/trans. If you've got the opportunity to do such a swap, I'd say you'll not regret it. I haven't.
05-07-2013 09:52 PM
badboydeafjeep Or u can go to engine company called (( golen engine )) they have long block I-6 with 350 hp in it price go for $4,999 for it .
05-07-2013 09:47 PM
badboydeafjeep Diesel ?? Sorry!!! Not for me !!!!
05-07-2013 07:11 PM
TOK
Quote:
Originally Posted by badboydeafjeep View Post
U can get hemi as v-6 engine there are few aroundin some cars at dodge but i know 5.7 hemi is v-8 plm it too long if u wanna have some room around it get a v6 in it. It up to u u can mod it to extra hp out of it!!!
There are plenty of hemi engines. Toyota has had hemi engines in various displacements for years, even 4 cylinders. They never made a big deal out of it. Its not just the hemispherical combustion chamber that makes it powerful, you need the displacement too. Dodge just grabbed onto the hemi name and used it as a marketing tool.

I'm with the other guys saying a Diesel is the superior option for a Jeep. They make as much torque as the 5.7 with half the displacement, half the RPM. Perfect for offroad. The better MPG is a nice perk.

The only downside is cost... The Diesel in the new Grand Cherokee ends up being about a $4500 option. The hurts compared to the Pentastar price, but still sounds like a bargain compared to the cost and aggravation of a V8 swap. Hope they do it in the next couple years!
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