Re: Volant question
I just finished a little experiment with the Volant. I tracked my mpg over three days before the install and then over three days after. I took the same stretch of 40 mile road, with the outside temperatures within 3 degrees of 37 degrees Fahrenheit, and using my cruise control to keep things as consistent from day to day as possible. What I found is that my mpg increased about 3% with the Volant and that outside temperature is extremely important when comparing mpg gains. On one of my test runs, the outside temperature was 15 degrees Fahrenheit and it skewed the test so bad I threw that number out and waited for another day with similar temps as the other runs. That one day I ended up getting about a 15% dent in my mpg. I am sure on the colder days the computer has to dump more fuel in to keep the air fuel ratio in check due to the denser air.
I will also say that immediately after the install the mpg gain was the best and I am pretty sure, as others have said, that the computer adjusts to the CAI. The CAI does seem to make acceleration more smooth and that remains, but suspect the real benefit is going to come from using a programmer with the CAI.
FYI: I also have Corsa exhaust installed. The added noise in the intake with this exhaust is only noticeable under WOT.