Quote:
Originally Posted by SVOboy
I'm glad you did this test, but I hope others don't take this to mean that "hot air doesn't work" or that "hot air is debunked"
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Indeed... concluding the wrong thing from a test can be worse than no test at all.
This is a great post though, and puts a fine point on the fact that there is more to it than meets the eye, you need to test your car.
This makes me wonder if there is an optimal intake temp or temp range (to achieve max FE) for every fuel injection system and engine. If so, having access to very hot air, and very cold air in winter allows for mixing to maintain the 'sweet spot' if you use a flapper door controlled by some simple circuit and upstream temp sensor. As someone in another thread pointed out, most 70's and 80's cars came OEM with vacuum operated flapper doors <my daughter's '89 Honda Civic Si for instance>