Accuracy of Cobb Accessport
I tried searching the forums for anything pertaining to this, but couldn't find anything.
I was wondering how accurate the ECU readings are on the Accessport. I did a highway trip and it showed I was getting an average of 24 MPG. To me, these readings seem to be far off; for reference I have an '07 GT M/T I know the RX-8 isn't an economy car, but I'm trying to get an idea of what my mileage is based on driving habits, as well as any possible improvements after tuning. So has anyone compared the readings for fuel economy on a full tank with the Accessport vs. manual calculation? |
Why don't you calculate your mileage yourself manually and find out? Who uses a Cobb to calculate gas mileage anyway.........
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Originally Posted by 9krpmrx8
(Post 4252799)
Why don't you calculate your mileage yourself manually and find out? Who uses a Cobb to calculate gas mileage anyway.........
Which also makes me wonder how accurate any of the ECU readings are. |
calculating MPG via obd2 isn't accurate. It is a function of Vss, MAF, and AFR. Being as the car is running in open loop at highway speeds, the numbers aren't exactly all that accurate. I too see numbers like 25 - 26mpg from my 'device' ..... am i really getting that... no.
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Originally Posted by paimon.soror
(Post 4252942)
calculating MPG via obd2 isn't accurate. It is a function of Vss, MAF, and AFR. Being as the car is running in open loop at highway speeds, the numbers aren't exactly all that accurate. I too see numbers like 25 - 26mpg from my 'device' ..... am i really getting that... no.
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