[pgfpro]

1st pic. This is my Hot Air Intake Injection system.
2nd pic this is a pic of my type of intake looking at the ports where the hot air enters the intake port and is aimed straight at the fuel injector spray.

I did a test on this system a few years ago, where it really shined was during our winter months. With this system and a fuel heating system. I could see an improvement of 2mpg during the winter months only, in the Summer there was a very small gain.

This system really helps with increasing my IAT's 200*F plus to help with keeping the intake pressure at around 1psi. Even a difference of 150*F IAT to 250*F IAT keeping everything the same A/F, MAP, etc. will give me a 7mpg increase due to the PV=NrT equation.