Under Powered!!!
JK Freak
Joined: Feb 2008
Posts: 770
Likes: 0
From: Orange County, CA
I have around 13k on my 2008, auto trans, all I know is it runs alot better than the day I tried it out at the dealer with 21 miles, I was concerned about the power at first, but the salesman said he had one and it broke in good around 5k. I thought about a cold air intake , anyone know if this voids the lifetime warranty, or is the lifetime warranty a joke?
JK Enthusiast
Joined: Feb 2009
Posts: 260
Likes: 0
From: San Juan Islands
that's some weight... ecspecially with everything else. You've done enough to that jeep to warrant putting a substantial power plant in... start shopping for one!
JK Junkie
Joined: Jul 2008
Posts: 3,017
Likes: 0
From: Lakewood, OH
I'm not so much in line with a Hemi swap, but you are going to need to twist that little 3.8 a little more to make the power you want. The 65mph at 2500rpm you mentioned before is a little slim on power, likely producing just enough power to roll the vehicle on flat ground at that speed. Add a small hill or a head wind and you are likely downshifting to keep it rolling at that speed.
It's an awesome rig you have and some bullet proof components. The only thing you need are some steeper gears to move that tank and the power will feel fine.
BTW, since you're likely to be twisting that motor a little harder than most, have you done anything on the exhaust, intake or programmer side of things?
It's an awesome rig you have and some bullet proof components. The only thing you need are some steeper gears to move that tank and the power will feel fine.
BTW, since you're likely to be twisting that motor a little harder than most, have you done anything on the exhaust, intake or programmer side of things?
Thread Starter
JK Enthusiast
Joined: Nov 2008
Posts: 132
Likes: 0
From: Grapevine, Texas
[QUOTE]BTW, since you're likely to be twisting that motor a little harder than most, have you done anything on the exhaust, intake or programmer side of things? [QUOTE] I'm putting a hushpower muffler this week and haven't decided on an intake yet. The supercharger or Hemi is on my mind.... As far as the gears go, I just installed the 4.88's I don't even have 1000 miles on my jeep yet. I chose 4.88's with a manual transmission because the consensus seemed to indicate this as the best setup..... I guess that I can always downshift.
Thread Starter
JK Enthusiast
Joined: Nov 2008
Posts: 132
Likes: 0
From: Grapevine, Texas
come hang out with us @ Twin Peaks in Lewisville 6:30 next Wednesday (4/1) we get 20-30+ JKs out there, see what the guys are running and have to say.
JK Junkie
Joined: Jul 2008
Posts: 3,017
Likes: 0
From: Lakewood, OH
The consensus is pretty much right with a 6 speed and 35s. Unfortunately you're probably rolling with close to an extra half ton than most. 15% more weight, 15% more gear. Nobody ever seems to look at that much nor the terrain you're rolling over in your backyard.
With a programmer, new can and a drop in high flow filter I would think you will feel a decent bump in power. Not the kind that will set you back in your seat, but enough where you'll feel comfortable passing people on the highway. Also, driving in 5th at highway speeds will give you a precursory feel of what gears in the 5.80 range would feel like and a good indicator of whether you want to take on a supercharger or hemi.
With a programmer, new can and a drop in high flow filter I would think you will feel a decent bump in power. Not the kind that will set you back in your seat, but enough where you'll feel comfortable passing people on the highway. Also, driving in 5th at highway speeds will give you a precursory feel of what gears in the 5.80 range would feel like and a good indicator of whether you want to take on a supercharger or hemi.