building for fuel economy
 

well im in the proccess of fixing my first gen im getting about 15 to 16 mpg now but i would like to see close to 18 to 20mpg the truck has the starwheel bottomed afc spring mia and a 31/2in straight pipe i have a bhaf ordered for it 727 trans and four wheel drive im just wanting this to mostly be a daily drive that isn't a fuelaholic any advice or experiences thanks

The best setup I've run is

Tighter converter.
Stock fueling- Pump settings, injectors.
Better intake & exhaust.
Drive easy.

With that setup I could get 19-21 all day long with a 4wd 518 auto.

so the stock convertor will yield bad fuel economy im hoping the bhaf will add a little bit

That extra gear helps though, mine has the 727 also and going down the hwy the old three speed turns some rpm's. A good converter will help a little and maybe a small gain with the bhaf. The afc spring MIA is not helping though. Turn the pump down a little and keep your foot out of it.

yea i figured that spring wasn't helping see i figured the 727 trans would hurt since your engine is pratically rapping out going 50

Here's my setup:

BHAF
HX35 12 cm Turbo
3.73 Gearing, 4x4, 3" lift
Timing advanced
Fuel turned up a little
NV5600 Transmission
Gear Vendors
2 cycle oil mixed with each fuel up.

At a steady 60-65 mph, I'm seeing 26 mpg average.

k&n filter, straight pipe, 68-69 mph. i can get 25mpg