The testing sounds fine to me.
Turbo is not as adversely affected by changes in air pressure because it is a small factor at boost. Those factors you posted are for lightly modded n/a cars only.
Air pressure is 14.7 psi at sea level, for every half mile or so you go up it drops 1psi. 0 on the boost gauge is what ever atmospheric pressure is, then boost is counted on top of that. 10psi at sea level isnt the same as 10psi at 5280ft, 24.7psi vs 22.7psi. So you see the difference on a turbo car at 10psi is still so much less that an n/a car. You are talking a 13.6% loss of air pressure on an n/a car, but only 8% on that 10psi turbo car. At 18psi, it's only a 6% loss,and so on. The more boost you run, the less fator you get.
Why do you think the Top Fuel cars set records at the sticky tracks on cool days? Because at the 40lbs of boost they run, there is very little factor and track conditions and air temperature are bigger factors.
It's the same reason turbo cars make big power at elevated dynos. The correction factor is not accurate. I race all over, and mostly at elevation.
All the turbo guys I race with know the deal, alomost nobody around here tries to go fast n/a because it's such a handicap at this altitude. In the summer we see density altitudes as high as 6000+ft.
Turbo is not as adversely affected by changes in air pressure because it is a small factor at boost. Those factors you posted are for lightly modded n/a cars only.
Air pressure is 14.7 psi at sea level, for every half mile or so you go up it drops 1psi. 0 on the boost gauge is what ever atmospheric pressure is, then boost is counted on top of that. 10psi at sea level isnt the same as 10psi at 5280ft, 24.7psi vs 22.7psi. So you see the difference on a turbo car at 10psi is still so much less that an n/a car. You are talking a 13.6% loss of air pressure on an n/a car, but only 8% on that 10psi turbo car. At 18psi, it's only a 6% loss,and so on. The more boost you run, the less fator you get.
Why do you think the Top Fuel cars set records at the sticky tracks on cool days? Because at the 40lbs of boost they run, there is very little factor and track conditions and air temperature are bigger factors.
It's the same reason turbo cars make big power at elevated dynos. The correction factor is not accurate. I race all over, and mostly at elevation.
All the turbo guys I race with know the deal, alomost nobody around here tries to go fast n/a because it's such a handicap at this altitude. In the summer we see density altitudes as high as 6000+ft.
I'm already working on getting this lined up.
