I concur with nuclearcarnie. You must stay out of boost in order to maximize mpg, whether you go quick or not. Keep that engine load low and monotonous at a cruising speed and you will see gains. I cringe at the fact people are getting 16 mpg with these gas prices. YIKES!

 

Monotonous

 

MPG: 200 miles on full tank
6MT or 5AT:6mt
SC, ST or TT:TN ST
Boosting Level:15
Injector Size:650cc
Stock Fuel Pump:Walbro 255
WHP/WTQ:505/536

 

MPG: 17 Mixed
6MT or 5AT: 6MT
SC, ST or TT: APS TT
Boosting Level: 14psi
Injector Size: 880?
Stock Fuel Pump: APS Extreme Twin Fuel Pumps
WHP/WTQ: 510/500

 

MPG: 13 to 18 (90% country roads); 25-28 mph highway, no boost
5AT, JWT TT 700bb
Boost level: 14 psi
Injector size: 1000 cc w/ CJM return fuel system
Walbro 255 fp

 

MPG: 10-12 hard city 15-18 fwy
6MT or 5AT: 6MT
SC, ST or TT: ATI SC
Boosting Level: 14psi
Injector Size: 650cc
walbro 255 pump
WHP/WTQ:450+/430+

 

Stock block? Lets see a dyno...

And no...I'm not beating a dead horse. I just want too see proof.

 

I get about 200 mi/tank. I haven't guaged it, but that figure is also with alot of the time at 140 mph.

 

MPG: 17-18 Mixed (~350 miles/tank)
6MT or 5AT: 6MT
SC, ST or TT: APS TT
Boosting Level: 10psi
Injector Size: 500cc
Stock Fuel Pump: 255
WHP/WTQ: 446/403

 

conclusions on fi mpg:

1. turbo > sc because you can stay out of boost.
2. if you drive hard, you're screwed anyway.

n/a i average 17-18 mpg beating on my car so it all comes down to how you drive really.

 

Whoa cananda is on stock injectors??? Good numbers for that set up! I'm impressed.