I mean we could create a HUGE mathematical algorithm taking into account EVERY variable that goes into fuel economy..but c'mon guys, really? It's an AVERAGE. That's all I'm worried about is getting a ball park average..I'm not factoring in which humidity and coefficients of thermal/liquid expansion and differences in density to detonation....blah blah blah..I just want to know how many miles I can go on AVERAGE before the fuel light comes on..if I was that worried about gas I'd take the bus..If the computer is off a little bit compared to hand calcs, who cares, there is obviously going to be error there. All I know is so far, my mpg's have gone up a bit.

 

i just put 305/65r18's on and true dual exhaust and the gotts mod, ordered the gryphon cs w/ 87 custom tow and 87 custom performance tunes. will this fix all the loss in power and the sluggish feeling? sure hope it does

 

Haha, I wasn't suggesting that anyone attempt to do that... just pointing out the fact that MPG readings are just ballpark figures.

 

yeah, it should feel about the same

 

i'm actually counting on more power w/ the gryphon and the intake and exhaust mods... does anyone use these settings on thiers?

 

You'll even out the power gains with the bigger tires. You should notice better shifts and a little more power, do you have 3.73 or 3.55 gears?

 

have 3;55 gears.... been thinkin' bout 3;73's though, gonna see how she does w/ the 3;55's for a bit bein' as though already spent a good chunk w/ christmas comin' up n all

 

You should be ok with all the mods you have planned. If you plan on going to bigger tires or towing regularly I would look at getting some 4.10s

 

gettin' a price from a ford mechanic to do some gears for me on the side...
gonna do some calc's on rear ends, open for all suggestions from all who have changed theirs...
still in the planning stage

 

What percentage of city vs highway driving do you do? 4.10s would be my recommendation, but maybe 4.56 if u do mostly city driving or plan on going larger. They are pretty expensive.