MPG on LS swap - JK?
12-16-2015 | 09:55 AM
#12
Super Moderator
Joined: Feb 2012
Posts: 3,068
Likes: 116
From: Bunnlevel, NC
.... yeah, myself.. I don't even think twice about fuel consumption. I'm smiling while driving and when it's time to put fuel in, I just think about driving it again!
12-16-2015 | 01:40 PM
#14
JK Junkie
Joined: Jun 2013
Posts: 3,697
Likes: 2
From: Grosse Pointe, MI
Given the decline in gas prices, it's currently similar to getting 40 mpg compared to the last many years. If someone can't afford to drive a JK now, they are 100% screwed when gas goes back up.
12-16-2015 | 02:57 PM
#15
Super Moderator
Joined: Feb 2012
Posts: 3,068
Likes: 116
From: Bunnlevel, NC
12-16-2015 | 08:25 PM
#18
JK Enthusiast
Joined: Jan 2008
Posts: 412
Likes: 0
From: New Brunswick
Looking for others who have done an LS swap to chime in please!
On my 2 dr JK: Running an early LS (5.7, aluminum block) mated to a 4L80. Geared 5.13, and somewhat heavy beadlocks/ and tires (35's). Rear armor, skid plate, etc.
I'm managing all of 11mpg combo hiway/street driving. I'm struggling with such poor mpg, but would really need to hear what others have been experiencing with similar rigs. With no basis for comparison, can't decide if I can complain or not!
Thanks
On my 2 dr JK: Running an early LS (5.7, aluminum block) mated to a 4L80. Geared 5.13, and somewhat heavy beadlocks/ and tires (35's). Rear armor, skid plate, etc.
I'm managing all of 11mpg combo hiway/street driving. I'm struggling with such poor mpg, but would really need to hear what others have been experiencing with similar rigs. With no basis for comparison, can't decide if I can complain or not!
Thanks
12-18-2015 | 03:44 AM
#20
JK Enthusiast
Joined: Nov 2011
Posts: 102
Likes: 0
From: Ephrata, WA
Looking for others who have done an LS swap to chime in please!
On my 2 dr JK: Running an early LS (5.7, aluminum block) mated to a 4L80. Geared 5.13, and somewhat heavy beadlocks/ and tires (35's). Rear armor, skid plate, etc.
I'm managing all of 11mpg combo hiway/street driving. I'm struggling with such poor mpg, but would really need to hear what others have been experiencing with similar rigs. With no basis for comparison, can't decide if I can complain or not!
Thanks
On my 2 dr JK: Running an early LS (5.7, aluminum block) mated to a 4L80. Geared 5.13, and somewhat heavy beadlocks/ and tires (35's). Rear armor, skid plate, etc.
I'm managing all of 11mpg combo hiway/street driving. I'm struggling with such poor mpg, but would really need to hear what others have been experiencing with similar rigs. With no basis for comparison, can't decide if I can complain or not!
Thanks
The 6l80 is a 6 speed lighter weight transmission with better gear ratios for highway driving and fuel acconemy, still strong but not like a 4l80e.
Do ya want bullet proof or fuel milage? Hard to get bolth some times. I personally am running the 4l80 with a np205 and doubler and saying screw fuel milage.
Also check if your o2 sensors are working proper. The ls motor will run even without the o2 sensors plugged in or broken, it just makes it slow and run rich, killing your millage. There are a couple diffrent types of o2 sensors used on ls swaps, one is grounded at the computer and one at the chassis, maybe you have the wrong o2 sensors for your computer?
Could always by a wide band o2 and see how rich your running. Also plug in a scanner into your dignostics port and see if your o2 sensors reading are fluctuating up and down or just staying at one level.
Last edited by DigitalPunk; 12-18-2015 at 03:55 AM.