MPG drop after ported housing and HPOP install
 

Put in ported housing and Adrenaline HPOP. It solved the surge issue and runs really well. Down side is that highway mileage has dropped off to 14.5 from 19. Comparing when running the 80DD. Thoughts?

7.3 X with FU

Are you calculating by hand or do you have a over head display you are going by?

Have you had a chance to drive it normal yet?

I know as soon as I do a new mod fuel mileage drastically reduces for awhile.

LOL

I've had the X for 10 years now and have always used the factory MPG gauge to monitor progress of mod changes; it's been very consistent. I have a 56 mile one way run most days so i get a chance to contrast and compare. Switching to stock, i actually get worse MPG's. With it in 80 DD it's best and seems to level out at 14.8 - 15 mpg. I'm not getting excessive smoke, it runs and sounds really good. No surge and very good shifting. I previously have gotten 18 - 19 on the same stretch.

I know i haven't given much to go on but just trying to account for anything i should check or monitor as a result of the swap. Despite the drop, i am happy with the performance; will work to optimize to get my mileage back

The Issue that I see is that you are using the factory mpg gauge... This works ok, but with aftermarket tuning and parts the computer can no longer calculate correctly the mileage. i recommend hand calculating the mileage to see what your truck is really doing. :)

:whathesaid::whathesaid:

did you change where you get fuel?