I don't understand bro? I know air density, bars, atmospheres I'm not sure I undertand this.

 

The higher you go the leaner the atmospheric pressure. The lower you go the greater. At sea level its 14.7 psi. We have dive tables set up for higher altitude etc.

 

at higher elevation, the air is thinner so there is less oxygen with which to make power. at or below sea level, the air is richer with oxygen and you need oxygen to make power.

 

Right on, I see what you are saying. When I hear enriched air or rich air I'm thinking of NITROX or something like that. My bad.

 

In the world of kinetic theory of gases and gas laws, atmospheric air is around 20-21% oxygen and 78-79% nitrogen. Go up in pressure, go down in pressure they are the same. The percentages are the same. If you enrich oxygen, you bring it up from 21% or 25% etc. I was over thinking it, my bad.

 

well, technically i think that its not so much richer as the air is more dense at sea level, so a cubic foot of air at sea level has more oxygen than does a cubic foot of air at high elevation. so a car at sea level with a perfect mixture will be very rich at high altitude with nothing else changing...and at sea level youre bringing in more combustable oxygen to mix with fuel and the more fuel you can run and the more oxygen you can jam into the engine, the more power you can make.

 

Yes Sir, now that makes sense to me. The percentages are the same, but the density is not.

 

turbo or superchargers. Since blown is not naturally aspirated, I think he should be able to compensate by just boosting to the same amount he would have at sea level. Question I have is, do the waste gates start spilling at an absolute pressure or just a differential above the pressure around the vehicle? So for example would they start opening at 50psi absolute pressure or just at 14psi above whatever air pressure the truck is currently seeing?
If he can compensate by using his blower, it might theoretically give him a boost in racing at altitiude since he'd have less air to cause drag at high speed right?