you can also get a economy cam, i can get one for my jeep at 198 dollars and it says it will increase FE by 2-3 mpg and move the torque band from 1500-3000 to idle- 2100 witch would be great for my jeep sense i don't go over 2000 rpm except when i need to speed up quickly and i hit only 2100 rpm's at max(i also think that if your ecodriving that 2-3 mpg gain could hit 4-6 or more)
I was thinking that smoothing your intake could help alot to because you don't need the tubulence in the intake if you have MPFI or direct injection so then a rough intake only hinders flow(i also believe that this kind of performance stuff is best on manual vehicles then automatics because you can control your gearing better with a manual to optimize your new power band for FE)
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