alicechen

I so love this vehicle, we checked the gas usage per 100km and it wasn't great!
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"UPDATE" results from Superchip Flashpaq reprogram as promised ..

The specs for those late to the party.
2008 Unlimited Sahara 3.8L V6 Auto 90,000klm
3.73 gears
35x12.50x16 GY Duratracs (actually measure 34")
3.5" front lift, 2.5" rear lift
relocated exhaust no motor mods other then the Flashpaq

1027klm since Flashpaq install
Install info
- 87 octane tune
- recal for tires/speedo
- removed Rev limiter (factory was set at 5280rpm)
- removed Speed limiter (factory was set at 140kph) ..
- throttle response - set to Superchips setting

Should have done this a long time ago. So much more fun to drive. Highly suggest this product. I did this on my 98 RAM with the same great results 7 years ago.
- Throttle response is much better, not sluggish anymore.
- shifting in auto is firmer and more accurate (like it should have been from the factory)
- does not hunt for gear as much, downshifts sooner.
- more torque in the bottom
- more passing power as the Rev and Speedo limiters were removed.. Yes I had it over 160KPM passing the big rigs with no problem.
- seems to get up to speed quicker
Bonus = better gas mileage.
On a 500klm road trip yesterday I averaged 12.2L/100klm (19.6mi / USgl. or 23.5mi / Imp gallon) with O/D off Cruise Control set to 110klm when on the highway. Thats just shy of 700klm for the 85liter tank in the Unlimited. Currently at 340klm at 1/2 tank.
At 110kph the engine runs in its sweetspot at 2500rpm
Overall observation is that the Flashpag takes time to learn your driving habits and is still tweaking itself in mine at just over 1000klm since reprogram. It seems to get better every time I drive it. Once it has settled in I will update this post again then try the 91 Octane tune.

With this tuner you should see an easy consistent 2mpg increase in mileage. This mileage increase will vary dependent on your driving style.
If you are still on stock tires there is no reason you shouldn't get under 10L/110klm. Remember I'm getting 12.2L/100klm on 35s and 3.73 gears. If I swap out to 5.13 gears and can then use O/D I can prob pull out another mpg or two.