91 d150 318..auto..ac..no cat two stage flowmaster exaust????

 

11, maybe a bit more thanks to the cat delete and flowmaster. i think removing the air pump belt might have helped me a bit - but its always so tricky to be sure. couldnt have hurt anyhow. the most ive ever head claimed is 16-18 city. id like to see that to believe it though.

 

sounds about righ i can tell itoo when i stand on it. gas gauge reads a little lowtoo. think i will take off thap air pump belt. Trying to get speed sensor but my step brother has said its coming for over a week. we will see.

 

If I drive it like I stole it, like how I did when I first got my license, I get 8-10mpg. Normal driving is around 13mpg, but when I drive conservatively I believe I can get 14-15mpg.

Truck and Mods in sig

 

it seems that decent headers, high flow (or deleted) cats with a decent size exaust gives reasonable mpg gains ont hese things.

 

1983 d150 318 stock with dual exaust and 5 speed 22 hwy with a miss

 

1982 w150 3.7l slant six fourspeed manual 33in mud terrains and i get better milage than my girlfriends 2001 beetle non turbo

 

22 !?!?!?!?!

 

I drive it like i stole it too!! haha i had it rollin 80 down the interstate.

 

my 85' 150 custom lwb with a 318 edelbrock 600 cfm carb np435 and 3.54 12bolt dule out only gets 10 (around 70) on hwy or city i dont why its so bad. but at 90+ 17-19 runnin 3200 it just hums along