Attention: TDR Forum Junkies 
Since I have had the cam change I have had 2 tanks of fuel, I'll fill up again tommorrow for the 3rd tank.
First tank - netted 16. 23 mpg with some highway miles (55 to 65mph) From Lawrence to Omaha. The rest was intown. Don't remember what the "computer" said the milage was. This tank had several "lets see what it'll do blasts on it". I need new rear tires soon.
Second tank - netted 16. 10 mpg this was all intown. Normal driving. The "computer" said 19. 2mpg. Majority of the time COMP was off...
Third tank I will know tommorrow. But I went to KC (an 80mph for a while to burn fuel to lose weight), ran 7 times down the strip, drove home. I had a lil over half a tank while racing. On the way back I set cruise on 70mph (which is close to 73mph with tires) and sat back. . other then playing with a mustang once or twice. trip odometer reads 430. 9 miles which with the tires it stands as 448. 14 actual miles. The low fuel light came on about 25 to 30 miles from home. I'll have the actual mpg tommorrow when I go fill up. The "computer" reads 22. 1 mpg right now.
Before this, based on the fuel tickets i could find (I got more somewhere, soon as I remember where I put them "so I wouldn't lsoe them")
every since I changed to 285's I would average 13 to 15mpg (mainly 14. 5 range), with a few 16 mpg highway trips. only once that I know of did I get 17mpg. I also noticed I have nver put in more then 29 gallons of fuel. I am really anxious to run it on the highway when I get a chance and keep it at 70mph (on the speedo) for 200 miles or so.
Something else I noticed on my way down to KC. If I ran 75mph+ for a length of time, the engine temp would be a needle width or a lil more past 190°, if kept under 75mph it was right on 190° or slightly below it.
My turbo spools decently, however after my visit to the track tonight I have concluded this turbo I have doesn't supply me with the volume of air needed (with the cam and bigger injectors)... hence my EGT's are slightly out of whack when racing. I'm going back to a B1 turbo and reevaluating. The AT-4 turbo might be good for some, but not at this power level (500+). This turbo has been dragged raced, sled pulled, and beat on pretty hard.
Its late I am tired, hopefuly this info will help someone down the road.
First tank - netted 16. 23 mpg with some highway miles (55 to 65mph) From Lawrence to Omaha. The rest was intown. Don't remember what the "computer" said the milage was. This tank had several "lets see what it'll do blasts on it". I need new rear tires soon.
Second tank - netted 16. 10 mpg this was all intown. Normal driving. The "computer" said 19. 2mpg. Majority of the time COMP was off...
Third tank I will know tommorrow. But I went to KC (an 80mph for a while to burn fuel to lose weight), ran 7 times down the strip, drove home. I had a lil over half a tank while racing. On the way back I set cruise on 70mph (which is close to 73mph with tires) and sat back. . other then playing with a mustang once or twice. trip odometer reads 430. 9 miles which with the tires it stands as 448. 14 actual miles. The low fuel light came on about 25 to 30 miles from home. I'll have the actual mpg tommorrow when I go fill up. The "computer" reads 22. 1 mpg right now.
Before this, based on the fuel tickets i could find (I got more somewhere, soon as I remember where I put them "so I wouldn't lsoe them")
every since I changed to 285's I would average 13 to 15mpg (mainly 14. 5 range), with a few 16 mpg highway trips. only once that I know of did I get 17mpg. I also noticed I have nver put in more then 29 gallons of fuel. I am really anxious to run it on the highway when I get a chance and keep it at 70mph (on the speedo) for 200 miles or so. Something else I noticed on my way down to KC. If I ran 75mph+ for a length of time, the engine temp would be a needle width or a lil more past 190°, if kept under 75mph it was right on 190° or slightly below it.
My turbo spools decently, however after my visit to the track tonight I have concluded this turbo I have doesn't supply me with the volume of air needed (with the cam and bigger injectors)... hence my EGT's are slightly out of whack when racing. I'm going back to a B1 turbo and reevaluating. The AT-4 turbo might be good for some, but not at this power level (500+). This turbo has been dragged raced, sled pulled, and beat on pretty hard.
Its late I am tired, hopefuly this info will help someone down the road.
What even amazes me more is that we're talking about a truck that weighs over 7,000lbs, is lifted on 35"s, and is cranking out over 400rwp! 
I'm VERY happy with my 18mpg, so I think my $$ may go elsewhere. 
