[SuperSound]

Originally Posted by xgnxs

Really? I would think that FI engines would be less influenced by atmospheric conditions vs NA, since you're forcing the air into the engine as opposed to just whatever the engine can grab. Interesting, learn something new every day!

NA motors struggle at high altitude due thin air reducing the amount of air they can push in the cylinders. This is why superchargers/turbochargers came about in WW2 to help piston engine planes produce power at high altitudes. So yes NA can feel the effects strongly too. From my understanding, ambient air temp and humidty hurt FI worse than NA because of even hotter intake air temperatures (due to boost) and humidity reduces the amount of boost produced (air is thicker and harder to compress). IHRA Pro Mod class allows FI and N20 cars to compete and is the best example to see how much atmosphere can affect performance. The FI cars love high altitude and cold air temps but suffer due to traction. N20 cars deal with the heat much better because N20 also cools as it is injected and is more predictable in power output compared to FI.

I'm sure someone on here can give a better explanation on the effects. This is just my limited understanding of the situation.