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Old 03-01-2013, 01:40 PM   #61
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Does it really matter if we have minivan engines. Modular engines only do one thing- make it cheaper for the consumer and they get a better engine. If a manufacturer has several million dollars for R&D they will split it up amongst all of their engines. If they have fewer engines, each one gets more money and the consumer will get an engine that has undergone more testing. Plus if you hydro lock yours, the chances of finding a junkyard engine are way higher if you don't want a new one. Plus with fewer engines, more aftermarket parts will be applicable as technically you could throw some dodge charger parts on your jk

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Old 03-01-2013, 02:20 PM   #62
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Courtesy of JP magazine. In the useable range, their power band is very close. The pentastar makes some more toque but gearing can put you in a range where that is not such a big deal

Lets say your jk is worth about 6k less as a trade than its identical brand new counterpart you'd buy. You get a supercharger for 5k and a regear for 1.5k. You spend only a bit more than trading it in and you have significantly more useable power and torque than any pentastar. There is another way to look at it.

Bottom line. If you like the way your jeep is now. Just regear. If you really like the new interior or a new color/top/door/transmission configuration you might want to trade because you won't get much of the money you put into the regear back on trade.

I tried to find an actual wheel dyno chart for a stock pentastar for comparison but I couldn't. If anyone has one(max horsepower will not be close to 285) they could put it up for comparison to a charged 3.8
Thanks, that's what I was looking for.

You pretty much answered my question (I need to save for a regear). Just wanted to make sure I wasn't being cheap. I could give a $hit what the interior looks like, don't want painted fenders or top either.

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Old 03-01-2013, 05:26 PM   #63
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Here is how it boiled down when I was buying my jeep.

4.0- good motor, good reliabilty, and nice torque out of i6
3.8- not bad in jk, sucked in jku, worse with lift and tires.
3.6- I will take 2- 1 jk and 1 jku

I know own 2 3.6's and wouldnt trade them for anything short of a hemi (no diesel fan here)
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Old 03-01-2013, 07:27 PM   #64
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Courtesy of JP magazine. In the useable range, their power band is very close. The pentastar makes some more toque but gearing can put you in a range where that is not such a big deal

Lets say your jk is worth about 6k less as a trade than its identical brand new counterpart you'd buy. You get a supercharger for 5k and a regear for 1.5k. You spend only a bit more than trading it in and you have significantly more useable power and torque than any pentastar. There is another way to look at it.

Bottom line. If you like the way your jeep is now. Just regear. If you really like the new interior or a new color/top/door/transmission configuration you might want to trade because you won't get much of the money you put into the regear back on trade.

I tried to find an actual wheel dyno chart for a stock pentastar for comparison but I couldn't. If anyone has one(max horsepower will not be close to 285) they could put it up for comparison to a charged 3.8
So from the graphs it shows the 3.6L has 1000 extra rpms in which it can spin (6500redline vs 5500 redline). Would it not be wise to consider that too? Anyone that has been in 4Low has seen how quickly you shoot up the rpms and how often you have to shift. If you start with a low revving engine and put huge gears on, you'll be shifting even quicker will you not?
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Old 03-01-2013, 07:30 PM   #65
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Thanks, that's what I was looking for.

You pretty much answered my question (I need to save for a regear). Just wanted to make sure I wasn't being cheap. I could give a $hit what the interior looks like, don't want painted fenders or top either.
Painted top and fenders are an option, not all 12+ come with them. The difference in tops do not resume only to the fact that the hardtop is painted
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Old 03-01-2013, 08:00 PM   #66
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So from the graphs it shows the 3.6L has 1000 extra rpms in which it can spin (6500redline vs 5500 redline). Would it not be wise to consider that too?
I'd say no. The amount of time you actually rev up that high is very minimum. Almost never on the road and off road with 4low you don't need to rev it up so high, you can just shift. You get good torque in all gears in 4low
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Old 03-01-2013, 08:11 PM   #67
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I'd say no. The amount of time you actually rev up that high is very minimum. Almost never on the road and off road with 4low you don't need to rev it up so high, you can just shift. You get good torque in all gears in 4low
Not saying you want to, but that you likely will have a very short power band imo. I could be over reading into this though
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Old 03-01-2013, 08:21 PM   #68
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1000-5500 is a pretty standard power band for most SUV's. Depending on the type of wheeling you do you are correct you can wind up the engine really quick. However usually when I do, I am spinning the wheels like mud and sand. At that point you are making enough horsepower already to break the wheels free. If all you need is 100hp to do so, winding it up to 2,000hp won't get your tires any more traction(actually less)

I'm not saying the 3.6 isn't a better engine in most aspects. I'm just saying that the 3.8 isn't so inadequate that off road the op will be remorseful
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Old 03-01-2013, 09:11 PM   #69
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I wish Chrysler had just changed the body with the engine so the 3.8 owners could continue in this "JK" Forum and all the 3.6 owners could go about discussing their 0-60 times, wheel and seat upgrades in the "??" Forum.

Oh, and by the way, I faxed a document today because it was faster than scanning it and then e-mailing it.

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Old 03-01-2013, 09:30 PM   #70
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I wish Chrysler had just changed the body with the engine so the 3.8 owners could continue in this "JK" Forum and all the 3.6 owners could go about discussing their 0-60 times, wheel and seat upgrades in the "??" Forum.

Oh, and by the way, I faxed a document today because it was faster than scanning it and then e-mailing it.

Dont forget the antenna mods............
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Old 03-01-2013, 09:39 PM   #71
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Correct me if i'm wrong, but the 3.8 was simply moved to the wrangler from a minivan... The pentastar was designed to be the workhorse of the brand, and planned from the factory with different variations for specific models. Imo that's a big difference
Trying to make yourself feel better about having a motor that is in a minivan? LOL

The 3.6 was made to replace the 3.8. Nothing magical about it


90% of the people on this forum are two closed minded and think that whatever they have is the best there is.

Some people dont have a clue there is way more to a jeep then the motor . But I guess if you want to make yourself feel......
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Old 03-02-2013, 01:35 AM   #72
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Im not sure if you are saying the new 3.6 is only for the wrangler or not but it isnt. The 3.6 is in all of chryslers brands from minivans to suvs.
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Old 03-02-2013, 06:44 AM   #73
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I summed it up in another thread but the 3.6L has 42.5% more hp than the 3.8 and 46% quicker in 0-60. The 3.8L diehards can try and brush that off as insignificant but even Motor Trend says it's a noticeable improvement in performance.
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Old 03-02-2013, 07:11 AM   #74
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I summed it up in another thread but the 3.6L has 42.5% more hp than the 3.8 and 46% quicker in 0-60. The 3.8L diehards can try and brush that off as insignificant but even Motor Trend says it's a noticeable improvement in performance.
That is very true, however, that doesn't always translate into a meaningful difference. Especially when we are talking about a vehicle as versatile as a Jeep. I have found that (in my limited experience with a Jeep) what power and torque that can be delivered very low in the RPM range is more significant than the upper end. This is not a race car that I am red-lining to get every possible unit of performance out of.

The real world question is: does the additional benefits that comes with a 3.6 outweigh the additional cost that comes with it?

And the whole argument about whether it came from a minivan or not doesn't really matter, Lamborghini started as tractor engines. As long as the tool fits the job who cares?
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Old 03-02-2013, 07:54 AM   #75
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The 3.6 definitely has more hp, but peak is at 6350 rpms. That's not what I'd consider "usable". Would I rather a 3.6? Yes, but mostly bc of the tranny.
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Old 03-02-2013, 08:44 AM   #76
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I summed it up in another thread but the 3.6L has 42.5% more hp than the 3.8 and 46% quicker in 0-60. The 3.8L diehards can try and brush that off as insignificant but even Motor Trend says it's a noticeable improvement in performance.
Well I don't need to read numbers and what magazines are paid to say, I own an 08 JKUR, and a 12 JKUR. Here's the difference: You can't even compare the two engines! The 12 will walk away from the 3.8 easily! A customer came in last week with a Ripp equipped JKUR, and after driving it, I like the 3.6 power better. It was fun to drive though. As far as diesels, jeep announced they are adding an oil burner to the wrangler for 15. I can't wait to get one! Diesels are the only engine that are worth buying programmers for, they're like a giant vacuum leak, pump more fuel and it pumps more horsepower!
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Old 03-02-2013, 12:35 PM   #77
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Right, because they added the dohc vvt in the 3.6 only so jeepers can say they have vtec too... And in no way is it helping things to have an extra gear in your tranny... Why keep up with technology when you can cruise around with minivan gear on your rig pre '12 all the way! Or if you're really masochistic, get a pre '11and make due with the old interior too
The new 3.6 minivan engine is a lot funner to drive than the old 3.8 one that's the truth remember minivans Cary alot of weight ppl & luggage .
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Old 03-02-2013, 12:55 PM   #78
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I have a 2010 3.8 manual and i do wish that it had the new engine in it. So to try and solve that problem without buying a new jeep, i put a banks air intake and banks monster exhaust on it. I know i know they are supposed to do nothing but i have noticed a difference. I can now keep up with my buddies in their 2012s and sometimes win. So if you want to save some money buy the 3.8 and upgrade the air intake and exhaust. I have 3:73 gears and it does fine with 35 in tires and now i don't have to downshift going up hills. It also sounds better haha. But to each his/her own...
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Old 03-02-2013, 01:15 PM   #79
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The 3.6 will eat the 3.8 off idle to redline period end of story.
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Old 03-02-2013, 08:52 PM   #80
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I summed it up in another thread but the 3.6L has 42.5% more hp than the 3.8 and 46% quicker in 0-60. The 3.8L diehards can try and brush that off as insignificant but even Motor Trend says it's a noticeable improvement in performance.
So I am guessing you have a 3.6 (on my phone so I cant look at your profile) I have a 3.8 but am not a diehard fan of it. But since the numbers are so insignificant you should be able to beat any 3.8 on any track right.


Since I cant see your profile and have no clue what you drive I am going to ask you if you live close to Texas and are willing to prove that all that power makes a difference when it comes to wheeling?


On the freeway sure it makes a difference but believe it or not lots of folks dont just drive there jeeps on the freeway.
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Old 03-02-2013, 08:54 PM   #81
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...On the freeway sure it makes a difference but believe it or not lots of folks dont just drive there jeeps on the freeway.
It seems in this forum wheelers are in the minority...
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Old 03-02-2013, 08:59 PM   #82
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It seems in this forum wheelers are in the minority...
Very good point. Especially in the last year. I tend to forget that sometimes
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Old 03-02-2013, 09:07 PM   #83
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My hole point is that people tend to post in threads like this because they think they have the best, and are not going to let on that they might be wrong. I know my jeep was under powered when I bought it, but I worked around it and am happy enough with the outcome. That dosent mean that my jeep might get a lot more HP after a while. But you can bet your butt I wont be braging about my 0 to 60 times.
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Old 03-02-2013, 09:07 PM   #84
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Very good point. Especially in the last year. I tend to forget that sometimes
Yeah, it really did pick up last year. There are many car threads and posts as it appears that for many the car features are the most import thing about their Jeep.

I try to only post when the OP wants to wheel it, and the OP said it's not going to be a DD, so I added my comments. It appears that he is sifting out the car comments and focusing and the Jeep comments.
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Old 03-02-2013, 09:20 PM   #85
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Even though I have both engines, I will never get rid of my 08. I think the 3.8 engines are built better to last longer. Roller cam, flat top Teflon coated pistons, 4 bolts mains.
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Old 03-02-2013, 09:42 PM   #86
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It seems in this forum wheelers are in the minority...
I never see these threads on ANY of the other forums ... and the wheeling done by those members is no joke.

WF is my first and favorite, but ...... such topics. I'd rather read about re-gearing than drag racing a cube.
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Old 03-02-2013, 10:45 PM   #87
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So I am guessing you have a 3.6 (on my phone so I cant look at your profile) I have a 3.8 but am not a diehard fan of it. But since the numbers are so insignificant you should be able to beat any 3.8 on any track right.

Since I cant see your profile and have no clue what you drive I am going to ask you if you live close to Texas and are willing to prove that all that power makes a difference when it comes to wheeling?

On the freeway sure it makes a difference but believe it or not lots of folks dont just drive there jeeps on the freeway.
I love how some people can justify anything that they dont have as useless. I bet if your jeep only had 4HI you'd probably be in the camp that knocked on the 4LO saying it's pointless and you dont need that much power and torque on the trail. Throwing blanket statements is the worst thing you can do! Why wouldn't more power help on some trails???? Not everything is flat or muddy, sometimes you gotta climb mammoth hills and you need that power. And not everyone that wants a stronger engine is a boy racer that never sees the dirt! But hey, if power is so useless offroad, why dont you swap a neon engine in your rig, that way you can get good mileage on the trail too
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Old 03-02-2013, 10:48 PM   #88
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It appears that he is sifting out the car comments and focusing and the Jeep comments.
Yeah, i'm not sure how the topic of minivans keeps coming up. Still there has been some great info on here.

I will have to drive one to see how it goes. I think it may work for what i want.
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Old 03-02-2013, 10:50 PM   #89
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It seems in this forum wheelers are in the minority...
How do you know??? I'm out almost every single weekend, but you have no way of knowing that just by reading my posts.
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Old 03-02-2013, 10:53 PM   #90
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Yeah, i'm not sure how the topic of minivans keeps coming up. Still there has been some great info on here.

I will have to drive one to see how it goes. I think it may work for what i want.
Seems you had your mind made up all along, just needed confirmation. As long as you're happy, that's all that matters. Everyone is going to take a different route, but eventually we end up in roughly the same spot, so it's all good as long as you have fun

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