What extra air? The engine is only going to suck through the amount of air
it needs to run at a given rpm. It may have less resistance and at high
engine speeds it may be able to grab a little more air, but for normal
driving it will still get all it needs to function and the computer will
give it the proper fuel ratio. The stoichiometric fuel-air ratio is 14.7:1
of air to gasoline vapor for optimum combustion. The computer is controlling
the fuel injectors to get as close to that as possible and adjusts according
to feedback from sensors.
Cold air is more dense than hot air so it contains a tad more oxygen per
cubic foot. At speed, I don't know how much difference in temperature there
really is. A 70 mph gust of wind under the hood tends to move the heat away
quickly. At low speed with the AC on and air passing over both the coils,
there is probably a greater difference
Motorsforum.com is a website by car enthusiasts for car enthusiasts. It is not affiliated with any of the car or spare part manufacturers or car dealers discussed here.
All logos and trade names are the property of their respective owners.