Improving Fuel Milage

[bronx79]

I've noticed the best mileage I've gotten so far is by not letting the RPM's go above 3,000. I can usually stay around 15-16 mpg's doing this.

I would kill for your "15-16" mpg's!!! And my truck almost never sees 3k rpm.... And I get lousy mpg's

 

[2005 3rd gen Hemi lifted]

Deff do not buy the TB spacer. You can do the intake, tuner, exhaust and show some gains but will cost $$$. I get better MPG now with heads, cam, injectors, full exhaust and tune then I did with just intake and muffler swap. Its all in what you want out of the truck.

What heads,cams, and the size of your injectors did you use on your Hemi?

 

[truckin151]

old post but what the hell. I get 16.8mpg and 99% of the time I drive it like I stole it. the more efficiently it runs, the easier it gets up to speed with less gas being used, the more you will see your mpg's go up.

When I was just running an exhaust, superchips and a cai, I always, ALWAYS, got better mpg with the 91oct gas and the 91 performance tune over their de-tuned mpg tune. talking 10mpg vs 13mpg between tunes.

 

[bronx79]

old post but what the hell. I get 16.8mpg and 99% of the time I drive it like I stole it. the more efficiently it runs, the easier it gets up to speed with less gas being used, the more you will see your mpg's go up.

When I was just running an exhaust, superchips and a cai, I always, ALWAYS, got better mpg with the 91oct gas and the 91 performance tune over their de-tuned mpg tune. talking 10mpg vs 13mpg between tunes.

You get 16.8 city?? or is that mixed with highway driving?

 

[truckin151]

just city I get right around 15-15.5, highway ( between 70-90mph) right around 19mpg (all hand calc'd), 16.8 Hess been the average for the past 2 months with a 40/60 split city/hwy. Almost never go past 1/2 throttle as she gets up and goes real quick without a lot of peddle, even chirps the tires on the 1-2 shift.

My motto when it comes to mileage has always been, it's a truck not a prius and mod to increase overall driveability & efficiency.... in other words make it run better.

 

[ZakkBaker]

Dang I need to get a chip! Lol. Or programmer it whatever they are...any preferred?
And yeah just depends how you drive it and how it runs. Don't accelerate quickly, keep rpms low, coast in neutral, don't speed up toward a red or stop sign lol. Simple stuff like that will go a long way.

 

[KGBIGCOUNTRY]

What heads,cams, and the size of your injectors did you use on your Hemi?

Sorry I had missed this. Im running a set of PWR stage 2 heads with an Inertia Motorsports Crazy Spartan on a 112 LSA (tighter then their normal 113-114) with a set of 6.1 injectors adjusted on they dyno with DSP. The injectors were not really needed seeing as the 5.7s will flow enough for what I have but have these incase stuff changes around on the truck. The truck does not have to work to get up to speed is the only reason I show good gains and all around better mpg's.