PERFORMANCE COMPARISON

Production

Eco Tune HOT Tune Turbo Kit
160 hp 188 hp 200 hp 218 hp
300 ft*lb 335 ft*lb 364 ft*lb 400 ft*lb

0-60 mph Performance (Sea level, 70° F)
Run (in seconds) 1 2 3 4 Avg
Production 12.05 11.94 11.91 11.80 11.93
Eco Tune 10.77 10.27 10.66 10.31 10.50
Hot Tune 10.01 10.33 10 10.35 10.20
Turbo Kit 8.4 8.2 8.35 8.3 8.31

The torque is increased over a large rpm range, thus providing a better "seat of the pants" feeling during city acceleration and highway passing. The 0-60 mph performance runs show a 1.5 second improvement vs. stock with ECO tune. The HOT tune is good for another 3 tenths over the ECO tune! The turbo kit is a whole new sport!

FUEL ECONOMY COMPARISON

The stock Liberty CRD has decent fuel economy, but with all the recent instability in fuel prices consumers are becoming more cognizant of finding ways to reduce fuel consumption and operating expenses. Eco-Performance reduces combined city/highway fuel consumption substantially. Remapping of the boost set point in normal driving and at wide open throttle (WOT) has minimized visible smoke. The fuel injection pressure has been increased at high load and higher limits set for max fuel delivery, which provide approximately 40 ft*lb more torque from 1800-3500 rpm and an additional 30 hp at 4000 rpm. The performance data does not provide insight into real world driving feeling. However, the product reduces the 0-60 time by 1.5 seconds and this is accomplished with no increase in the smoke levels leaving the tailpipe.

Now let's look at the real world fuel economy results. The fuel economy numbers in mpg will vary from owner to owner based on driving style (conservative vs. aggressive) and the percentage mix between city and highway driving. The smoother and lighter your foot, the higher the fuel economy gains. Don't expect massive improvements if driving with a lead foot.

2005KJ Stock Hardware

 2006KJ Abused Driveline, All-terrain tires
City Circuit 1 (70 F, no AC)

 City Circuit 1 (70 F, no AC)
Stock Liberty = 17 mpg
Tuned Liberty = 22 mpg

 Stock Liberty = 15 mpg
Tuned Liberty = 19 mpg
60 mph cruise (70 F, no AC)

 60 mph cruise (70 F, no AC)
Stock Liberty = 31 mpg
Tuned Liberty = 36 mpg

 Stock Liberty = 29 mpg
Tuned Liberty = 33 mpg
70 mph cruise (70 F, no AC)

 70 mph cruise (70 F, no AC)
Stock Liberty = 27 mpg
Tuned Liberty = 32 mpg

 Stock Liberty = 25 mpg
Tuned Liberty = 28 mpg