fuel mileage update (before parked again)

[5.0Flareside]

ok guys.. i finally have got the chance to post what the differences in fuel mileage was before and after everything i've done...

ok... this is all data i've saved since i've had the truck... averaged out..

Stock 351W, 3.55 non-ls rear.. Summer 12 city, 16 highway Winter 10 city, 13 highway
stock 351W 4.10 Locker rear... Summer 11 city, 14 highway winter 11 city, 13 highway
Cam, Heads, Headers 351W 4.10 Locker Rear.. (ONLY 3 TANKS) 12 City, 17 Highway...

and these are all with the same driving styles, (flooring it, and driving the balls out of it) same gas stations, Home Depot, Kroger, Marathon (ethanol free)...

so what does that tell me.... when a freakin big truck can breath it gets better mileage.......

but thats just me...

 

[Beach66Bum]

Thanks Man for the data. I have the 351 Windsor too, but I'm only getting 10mpg on a good day. I really need to get headers put on. Thinking of stacking two air filters on top of each other. Seen it done before. Do you think there is any point in doing so?