First impressions of EcuTek tune on nearly stock Z

JARblue

I wanted to go ahead add that after several hundred miles of driving, my mileage appears to have improved noticeably. It will take a few tanks to confirm this, but I'm romping (not too hard) on it right now because its so much fun and getting MPGs like I used to get driving it casually.

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Spikuh

Any estimate of what sort of increase we are talking about?

I would be very interested in some possible explanations for such an increase as well, but that may be something may be something Dyno would need to come in and explain.

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SouthArk370Z

The engine is being made more efficient - it won't take as much fuel to make the same HP. Many ppl that get a tune are going to be driving harder after the tune and MPG will probably drop. If you drive the same after the tune, MPG should go up.

The same thing happens when you give an old points/carb setup a good tune - efficiency goes up and brings along more power/MPG (depending on how you drive).

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JARblue

I'm not going to guess numbers until I have more data (a 3 mpg increase would be almost 60 extra miles in a tank). But usually when I romp on it during a tank, I get ~15 mpg (~17 if there's a good amount of highway miles). Add about 5 mpg to those numbers for pure casual driving (highway miles push it up even further). Because of the trip back from the tuner, I would have expected around 17 or less depending on how Joe treated her. But I'm easily getting 19-20 mpg since getting the car back, and based on my driving in that time and previous experience, that's a notable increase.

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