Loss of Mileage after Intake install

Niksmo

From reading through the forum about Fuel Economy and breather mods, I came to an understanding that the increased volume of air would be compensated by more fuel by the ECU, to maintain the AFR. This seems perfectly logical and explains my lower MPG. Although, some people do seem to get better MPG with breather mods.

Potato skills in Installation. I was just concerned if I messed up the install.

JLarson

I suspect the difference in mileage is partly based on the year of the car. Later year Z cars are better able to adjust fuel to match increased airflow. In an earlier vehicle, chances are good a CAI would lean things out, somewhat improving mpg. My mpg definitely dropped after adding power mods. I still get decent fuel economy at 65 mph (27-30 mpg), but everywhere else in the power band it's much lower (but 20% more power, which consoles me).

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2014 370z Touring Sport Magma Red MT // BP Single Turbo 6467 // 63mm TB's // Z1 Ported Upper Mani // RJM Pedal // Zspeed Stage 3 Clutch // 526 WHP, 451 WTQ
2006 350z (Sold) // 1990 300zx (Sold) // 1985 300zx 2+2 (Sold)