Quote:
Originally Posted by Sasquachulator
My understanding with turbo gas mileage is that
You drive it lightly, not getting the turbo involved much and it returns good mileage (or whatever its rated at)
Once you get those turbo's spooling gas mileage just takes a huge dump. Since once you get those turbos involved, you're force feeding air into the cylinder chamber and the computer needs to adjust for the proper fuel/air ratio mixture for ideal combustion.
Its like VTAK and my VVTLi lift system. I hit the cam change (at high revs), get a power boost but my gas mileage goes down the shitter accordingly.
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Yep, more power means more air which means more fuel which means less MPG. But when driving lightly, a turbo gets it up to speed more efficiently so it uses less fuel. But having a big turbo which doesn't spool down low (like in the STI and Evo), doesn't help fuel economy much at all. The turbo in my Eclipse is tiny but still gives me good power and it gets great mpg for the amount of power/torque it produces.