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Topic Review (Newest First)
Today 03:19 PM
csrrsr I'm feeling somewhat confused? I have the 70th Annv JKU auto with 3.73 and the weak gutless...gas hog 3.8 I test drove the newer models this year for kicks and couldn't see enough difference between them to spend the additional money. Not an argument against the 3.6. Just hope down the line when it's time to up my game again Jeep has an engine that at least equals my gutless gas hog.
Today 03:05 PM
Xena1
Quote:
Originally Posted by TOK View Post
Its like you eliminated 30% of your problem by buying another Chrysler.

Wife wanted a Charger, I put the kibosh on that after 4 months of Jeep ownership. The Wrangler and Viper are the only vehicles that makes it worth putting up with them.
Yes I know, but Chrysler does have some good concepts, just poor quality. My 2001 Dakota runs like a top, and am hoping for the best with the new Challenger. I will miss the JK, and really wish I never parted with my 2006 with 9K miles.
Today 02:45 PM
TOK
Quote:
Originally Posted by Xena1 View Post
Keep your 4.0! Best engine ever put in a Wrangler. Developed by AMC in 1986 and used by Chrysler until 2006. Not to be a downer on Christmas day, but I have owned 4 new Wranglers from 2012 and all have had some type of engine problem. Traded in my last one a 2014 for a new Challenger 6.4L and will not buy another JK until some major improvement happens in the engine department
Its like you eliminated 30% of your problem by buying another Chrysler.

Wife wanted a Charger, I put the kibosh on that after 4 months of Jeep ownership. The Wrangler and Viper are the only vehicles that makes it worth putting up with them.
Today 01:37 PM
RoadiJeff
Quote:
Originally Posted by k_rudy_06lj View Post
I call b.s. I have a 4.0l lj 6 speed on 33's and my buddy has a 3.6l 6 speed 2 Dr on 32's. And I rape him in races and tug offs and of course sound
Be gone, troll. The 285 hp 3.6L Wrangler STOMPS all others. How about 0-60 in 6.6 sec for the 3.6L versus 0-60 in 10.4 sec for your 190 hp 4.0L for starters?

Jeep 0-60 Times
Today 01:36 PM
Xena1 Keep your 4.0! Best engine ever put in a Wrangler. Developed by AMC in 1986 and used by Chrysler until 2006. Not to be a downer on Christmas day, but I have owned 4 new Wranglers from 2012 and all have had some type of engine problem. Traded in my last one a 2014 for a new Challenger 6.4L and will not buy another JK until some major improvement happens in the engine department
Today 12:44 PM
TOK
Quote:
Originally Posted by k_rudy_06lj View Post
I call b.s. I have a 4.0l lj 6 speed on 33's and my buddy has a 3.6l 6 speed 2 Dr on 32's. And I rape him in races and tug offs and of course sound, and now my buddy is ditching his 3.6l and getting a 4.0l for his jk haha
I'm calling BS too... On putting a straight 6 in a JK!

I like the low end torque of the 4.0, but I think ultimately the Pentastar is faster. I will not argue that the 4.0 is probably better suited to a Wrangler and offroad use.

Still, in a drag race either you either have a great 4.0 or your buddy can't drive. Only had the opportunity to compare my 6 speed 3.73 '13 to a relatively high mile 4.0 5 speed TJ. The 3.6 mopped the floor with it.
Today 05:39 AM
k_rudy_06lj I call b.s. I have a 4.0l lj 6 speed on 33's and my buddy has a 3.6l 6 speed 2 Dr on 32's. And I rape him in races and tug offs and of course sound, and now my buddy is ditching his 3.6l and getting a 4.0l for his jk haha and I'm a technician at a ram chysler dodge and jeep dealership and the heads on any 3.6l get toasted very easily the most I ever had to do on a 4.0l was a valve cover gasket and a rear main seal lmao and I've been there for 3 years, the only thing the 3.6l has I mpg and that's it other than that they are junk, I understand that in today's time and economy we need to upgrade and make a change but for the wrangler they should have just made a upgraded 4.0l with a better fuel injection and intake And made it more suitable for today's economy and Mopar definitely could have...
11-11-2013 04:08 PM
panthermark Plasti-dip...

Some say it adds HP, so say it takes it away.

You make the call....

My butt dyno tells me that my plasti-dipped angry eyes gave me 20 more ponies!
11-11-2013 04:00 PM
chris4x4
Quote:
Originally Posted by daggo66 View Post
Don't forget stickers. Stickers can add 25 to 40 more HP!
True.....to a degree. The family stick figure stickers do nothing for performance. Neither do political stickers. "Monster", "NRA",NASCAR", and other similar stickers give the mist gains. Same goes for size. A 2" sticker won't have near the gain as a 6 foot sticker. I put a "Rock star" sticker on a buddies Prius, and that thing can drift like Ken Block was driving!
11-11-2013 01:47 PM
daggo66 Don't forget stickers. Stickers can add 25 to 40 more HP!
11-11-2013 01:19 PM
m998dna I just hit 3,900 miles... through spirited driving the adaptives added 50 HP - I feel it on my butt dyno.

Who needs a CAI and TBS when you can have 50 HP for free...



.
11-11-2013 11:57 AM
chris4x4
Quote:
Originally Posted by daggo66 View Post
A TBS in a fuel injected engine is worthless.
Correct. a throttle body spacer on a modern engine does nothing to increase the volumetric efficiency of the engine. the only type of spacer that has been shown to give any sort of gains at all, has been an intake manifold spacer. and the benefits of those is questionable on a variable valve timing engine.
11-11-2013 11:52 AM
panthermark I'm happy with the 3.6...but the bigger difference was the re-geared WA580 vs the old 42RLE. And yes, this is an old thread.
11-11-2013 11:15 AM
urmantrev I love the 3.6! I definitely didn't buy my Jeep for gas mileage, but I average 21-22mpg all summer long and drop to about 20 in the winter. It is a 2dr 6-speed with 3.21s but still! Never heard of that with a 4.0.
11-10-2013 02:51 PM
rnuover13
Quote:
Originally Posted by lexallen View Post
Its not about smoking other cars... but about getting as much quickness/power as affordably possible, and having fun messing around under the hood...
I got a Poweraid on mine and the Airaid too and it performs so much better. Did a resonator delete and a magnaflow dual exhaust and I'm in love with the sound and performance. I get tons of compliments on it daily. Doesn't have to be fast but it really makes it a lot funner to drive when you can upgrade it for a faster take off. After all, the modern day jeeps are made to improve the drivability.
11-10-2013 02:47 PM
daggo66 A TBS in a fuel injected engine is worthless.
11-10-2013 02:45 PM
lexallen
no need to....

Quote:
Originally Posted by daggo66 View Post
Oh yeah, TBS is amazing. I bet you can smoke a 'vette now.
Its not about smoking other cars... but about getting as much quickness/power as affordably possible, and having fun messing around under the hood...
11-10-2013 02:35 PM
daggo66
Quote:
Originally Posted by lexallen View Post
I love my 3.6... after adding the CAI and TBS, I actually have to be careful when flooring it while turning into moving traffic... its super quick. Also, I believe Dodge is putting the exact same engine in their new 1500 trucks (for the V6 option)... I think that says a lot about the power in the new 3.6
Oh yeah, TBS is amazing. I bet you can smoke a 'vette now.
11-10-2013 01:51 PM
lexallen I love my 3.6... after adding the CAI and TBS, I actually have to be careful when flooring it while turning into moving traffic... its super quick. Also, I believe Dodge is putting the exact same engine in their new 1500 trucks (for the V6 option)... I think that says a lot about the power in the new 3.6
11-10-2013 10:08 AM
Paul04tj wow, this thread is over a year and half old!
11-10-2013 12:40 AM
i82much
Quote:
Originally Posted by daggo66 View Post
Were they geared the same? My two JK's are basically the same other than engine and interior.
yeah rubi sticks are all 4.10's right? i think the 3.6 sneaks up on people. the butt dyno doesn't feel a difference in peak acceleration, but if you look at the speedometer after a few seconds you are actually going pretty fast.
11-09-2013 09:32 PM
daggo66
Quote:
Originally Posted by i82much View Post
Opinions are funny. I drove 11 and 12 jkr sticks back back to back and was shocked at how much faster the 12 was. I was anticipating a big difference and was still floored at how much more power the 12 had.


Because the peak torque is about the same, both will have roughly the same peak acceleration in first. But the 3.8 just gives up and the 3.6 keeps steppin'.
Were they geared the same? My two JK's are basically the same other than engine and interior.
11-09-2013 07:15 PM
i82much
Quote:
Originally Posted by JTPhoto JK View Post
A lot of the difference can be attributed to the poor factory tuning and throttle lag which is well noted in the 3.8. That being said, there can also be differences between same engines in the same model year. We have an 07,08, and 09 and the 09 always felt like it had a little more jam. Until the 07and 08 received tuners. The 07 has 4.10 gears the other 2 have 3.73. I test drove a few 2012-13 with the 3.6 and found very little difference motor wise from the 3.8, gearing wise for the A/T is another story.
Meh. It's the 40% more power that matters to me.
11-09-2013 06:14 PM
walc I only have 3200 miles, on my 2012 JK; but, I'm very pleased with the 3.6L and auto trans.
Of course, I may have something wrong with me. This is my 7th Wrangler and I've always felt the engines perform very well for their purpose.
I never bought a Wrangler and expected a Corvette.
11-09-2013 06:08 PM
JTPhoto JK
Quote:
Originally Posted by i82much View Post
Opinions are funny. I drove 11 and 12 jkr sticks back back to back and was shocked at how much faster the 12 was. I was anticipating a big difference and was still floored at how much more power the 12 had. Because the peak torque is about the same, both will have roughly the same peak acceleration in first. But the 3.8 just gives up and the 3.6 keeps steppin'.
A lot of the difference can be attributed to the poor factory tuning and throttle lag which is well noted in the 3.8. That being said, there can also be differences between same engines in the same model year. We have an 07,08, and 09 and the 09 always felt like it had a little more jam. Until the 07and 08 received tuners. The 07 has 4.10 gears the other 2 have 3.73. I test drove a few 2012-13 with the 3.6 and found very little difference motor wise from the 3.8, gearing wise for the A/T is another story.
11-09-2013 02:37 PM
i82much
Quote:
Originally Posted by daggo66 View Post
I now have both. A 2009 and a 2014. They both have manual transmissions and 3.73 gearing. When first brought home the 2014 felt very new and the interior much more "plush." It was smoother and quieter. (the 09 has an aftermarket exhaust). I didn't notice any huge difference in engine performance. Any difference was really masked by the "newness."

The 14 now has the same suspension as the 09, but with larger tires (34's). There is absolutely no major difference in engine performance between the two.
Opinions are funny. I drove 11 and 12 jkr sticks back back to back and was shocked at how much faster the 12 was. I was anticipating a big difference and was still floored at how much more power the 12 had.


Because the peak torque is about the same, both will have roughly the same peak acceleration in first. But the 3.8 just gives up and the 3.6 keeps steppin'.
11-09-2013 08:07 AM
00Sebby
Quote:
Originally Posted by MikeK46 View Post
Anyone figured out how to swap a 4.0 into the JK?

No defective heads, no hydraulic lifter bleed down, no [insert other Pentastar issues]. Must be nice
Yep, with the 4.0 we just had to put up with cracked heads on some late models, bad coil packs, leaky main seals, leaky valve covers, poor gas mileage, and other non-Pentastar issues. Don't get me wrong, I've had 3 Jeeps with the 4.0 and overall they are great, long-lasting engines... but not automotive perfection by any means.
11-09-2013 07:41 AM
daggo66 I now have both. A 2009 and a 2014. They both have manual transmissions and 3.73 gearing. When first brought home the 2014 felt very new and the interior much more "plush." It was smoother and quieter. (the 09 has an aftermarket exhaust). I didn't notice any huge difference in engine performance. Any difference was really masked by the "newness."

The 14 now has the same suspension as the 09, but with larger tires (34's). There is absolutely no major difference in engine performance between the two. Nothing about the 14 makes me feel like my 09 is any less.

The biggest advantage that I see to the 14 is the soft top. The new larger windows (introduced in 11) gives you a much better view and eliminates some of the blind spot.

The biggest disadvantage is the elimination of the open handle on the inside of the door. This takes away the "reach through the window" method of removing and carrying the doors.

In the take it or leave it department, I really don't need to be able to see my feet or the inside of my cup holder.

The one thing I would want on my 09 that the 14 has is the word "Jeep" lights up in the dash when you turn the engine on.
11-09-2013 05:35 AM
MikeK46
Quote:
Originally Posted by legitposter View Post
Seriously? With that mindset, you might as well just go get a horse.
If by horse you mean toyota, honda, or nissan....

Nah, I'm just kidding of course (my previous post was a joke). I love my JK. But I'm still a realist...just because I live here and own one, I'm not gonna deny that, for the most part, American cars are light years behind foreign cars.
11-09-2013 01:31 AM
BILLET SILVER I bought the 14 JKUS and have less than 900 miles on it so far and was averaging 21.9 mpg the other day on the interstate at 65 mph. Not a DD but was pretty impressed that it was getting over 20. It has auto and 3.21 gearing and I plan on a 2.5" lift and 33's so I doubt the over 20 mg will last for long.
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