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Old 04-28-2010, 08:55 AM   #31
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I think with the abundance of upgrade options there's probably enough untapped power in the 3.8L to satisfy any Jeep owner with realistic expectations. As has been said repeatedly, "It's a Jeep and not a sports car" so there has to be some reality in balancing the expectations of it's on-road performance versus off-road. There are threads that discuss upgrade chips for response and fuel efficiency as well as superchargers for power. So it seems to me that while the stock 3.8L may be a little on the puny side for a 4-door Jeep to outpace a sedan on the highway it doesn't seem like it's lacking for headroom to boost that perform while still retaining it's off-road capabilities without risk of overpowering the driveline components. That's been my perception as I've read through this and other forums and has aided in determining my own upgrade intentions.

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Old 04-28-2010, 09:06 AM   #32
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--------------BINGO-------------------


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Originally Posted by jake_blue View Post
I think with the abundance of upgrade options there's probably enough untapped power in the 3.8L to satisfy any Jeep owner with realistic expectations. As has been said repeatedly, "It's a Jeep and not a sports car" so there has to be some reality in balancing the expectations of it's on-road performance versus off-road. There are threads that discuss upgrade chips for response and fuel efficiency as well as superchargers for power. So it seems to me that while the stock 3.8L may be a little on the puny side for a 4-door Jeep to outpace a sedan on the highway it doesn't seem like it's lacking for headroom to boost that perform while still retaining it's off-road capabilities without risk of overpowering the driveline components. That's been my perception as I've read through this and other forums and has aided in determining my own upgrade intentions.
---WOW, thanx Jake

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Old 04-28-2010, 09:48 AM   #33
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I have a 4dr auto 2010 Rubi with 34" tires and it's a dog. Forget about towing even a small camper. Some of this may have to do with the fact there's little air where I live up at 8900 ft, but the computer should be compensating for this. Then again, it's only a couple weeks old, so maybe it will get better. I would love to boost the HP 10-15%. I've read exhaust and filters do next to nothing with this vehicle. I've had little luck with chips (on other vehicles) as well. Any ideas?
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Old 04-28-2010, 10:02 AM   #34
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Thats too bad, but you're probably young and didn't know what to expect!!


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I have a 4dr auto 2010 Rubi with 34" tires and it's a dog. Forget about towing even a small camper. Some of this may have to do with the fact there's little air where I live up at 8900 ft, but the computer should be compensating for this. Then again, it's only a couple weeks old, so maybe it will get better. I would love to boost the HP 10-15%. I've read exhaust and filters do next to nothing with this vehicle. I've had little luck with chips (on other vehicles) as well. Any ideas?
When I moved my '08 Rubi/trailer to NorNv (4200)ft, the ECM did a LITTLE recal, as I could feel a little more performance, pulling my trailer-up to 8000 ft, but I knew what to expect when I bought the JK and I have had more performance vehicles that you'll ever know

You must have the 4.11 gears (Rubi) so try to set up your vehicle starting procedure: to check fuel/doors close/coast clear front/back/seatbelts on/ign on/---OD OFF--OD OFF--OD OFF

No problemo and your ECM will adj slowly, but not much--live with it or sell it and buy an FJ 40

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Old 04-28-2010, 04:14 PM   #35
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I don't see a problem with the 3.8 and power. And I've got the '10 JKU gets up and goes just fine. It's one "H" off alot better than the '00 4cyl 5 spd I traded in.
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Old 04-28-2010, 08:51 PM   #36
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Thanks Jimbox. At 50, it's nice to be referred to as "young" . My first Jeep was in 1977, when I used it to plow driveways to make money. Since then I've owned 7 of them. Also have owned an FJ and a LR SIIa. But I guess this Noob just expected too much.
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Old 04-28-2010, 09:02 PM   #37
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Heh Heh, OOOOPs, well you are quite a bit younger than me


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Thanks Jimbox. At 50, it's nice to be referred to as "young" . My first Jeep was in 1977, when I used it to plow driveways to make money. Since then I've owned 7 of them. Also have owned an FJ and a LR SIIa. But I guess this Noob just expected too much.
Now maybe you shoulda done some more homework before buying that JK, I hear the FJ's and LR's are OK with power, but missing other stuff, hell it's 6 of one and half dozen the other !!

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Old 04-29-2010, 03:05 PM   #38
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Mine is a 2010 2-door with 35" tires and 3:73 gears.

My only issue is when the wind blows or you go over an overpass. It kicks out of OD and you just about have to floor it to keep going. I didn't buy the jeep for speed, I have other cars for that.
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Old 04-29-2010, 10:35 PM   #39
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The new 3.6 is on the way, probably will make us 3.8 owners sick....wonder if it will be a easy swap?

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