Hey guys,
I have recently been studying a lot about air density correction factor. This is something that is used on the focus st platform a ton, but hasn’t made its way to the fist as much. So I figured I would post about it for those who don’t know about this.
there is a gauge on the accessport called air density corr. This reading is typically anywhere from .85-1.2. The idea is very similar to DA in drag racing.
1.0 reading signifies an absolutely average day in terms of potential power. Anything above 1.0 means it’s a good environment for making power. While anything under 1.0 means it’s bad environment for making power, this could be because of the following factors
- altitude
- temp/air intake temps
-humidity
-location of air intake/efficiency of intercooler
If you are consistently seeing under 1.0, there are some ways to help. The biggest way would be meth injection. Spraying a water/meth mixture can cool down the air and help counteract a bad air density reading.
in fact there is a tuning shop called banks tuning or something like that, and he has done a ton of testing on air density. And he went on pikes peak, reaching a maximum altitude of 11,000 feet. And by using meth injection, he was able to make the same power at 5k feet and 11k feet despite the drop in air density.
he also put on a data logger and showed it as he drove up in altitude and the air density went down as low as .8 at 5000 feet elevation. This changed the potential horsepower output of his engine over 100 horsepower according to his data.
I have recently been studying a lot about air density correction factor. This is something that is used on the focus st platform a ton, but hasn’t made its way to the fist as much. So I figured I would post about it for those who don’t know about this.
there is a gauge on the accessport called air density corr. This reading is typically anywhere from .85-1.2. The idea is very similar to DA in drag racing.
1.0 reading signifies an absolutely average day in terms of potential power. Anything above 1.0 means it’s a good environment for making power. While anything under 1.0 means it’s bad environment for making power, this could be because of the following factors
- altitude
- temp/air intake temps
-humidity
-location of air intake/efficiency of intercooler
If you are consistently seeing under 1.0, there are some ways to help. The biggest way would be meth injection. Spraying a water/meth mixture can cool down the air and help counteract a bad air density reading.
in fact there is a tuning shop called banks tuning or something like that, and he has done a ton of testing on air density. And he went on pikes peak, reaching a maximum altitude of 11,000 feet. And by using meth injection, he was able to make the same power at 5k feet and 11k feet despite the drop in air density.
he also put on a data logger and showed it as he drove up in altitude and the air density went down as low as .8 at 5000 feet elevation. This changed the potential horsepower output of his engine over 100 horsepower according to his data.