NOS Idea.
 

What about always injecting tiny amounts of NOS and thus to be able to lower the combustion temperatures and also increase the power of continually lean burn conditions in order to get fuel economy?

Can NOS be produced at home ? :)

Nope, no home production,
 

Nope, no home production, but look into water injection, same idea of cooling the combustion temperatures. Allows you to advanced timing for more power and decrease fuel injected also. :-)

I've just litely read about
 

I've just litely read about water injection, sounds like a neat and difficult idea.

If this works out well though, why do we worry about water in the tank? especially in the small amounts that may get in there

Water in the tank messes up
 

Water in the tank messes up the fuel, but this water is basically misted into the air stream to make it more humid, so it doesn't fuss with the fuel as much, at least I'm thinking. Water injection isn't so hard, check out the article on it, ;-)

Water in the gas can be hard
 

Water in the gas can be hard on fuel pumps and fuel injectors.

Injecting small amounts of
 

Injecting small amounts of nitrous isn't going to get you anywhere. A proper nitrous system costs $450 plus another $100 for a good bottle heater. If the nitrous solenoid were to leak you would have leak of nitrous into your engine and over an amount of time your engine will be gone. The best uses for nitrous is at a track and with Intake and Header and electronics that cut the nitrous off right before your redline.

Re: Injecting small amounts of
 

Not to mention a lot of the serious racers will actually rebuild their engine after every race.

Well it depends. The only
 

Well it depends. The only people I see that do that are running 7's in the 1/4 mile. Either that or some idiot injecting a huge shot into a stock engine. If the engine is 2 liters or smaller I wouldn't do any higher than a 55 shot. If it's like 1.5L I wouldn't do higher than 50 shot. For mine I used to do 75 shot, but it's a 2.4L

When you go to V-6 you can inject up to 200 shot safely, the higher the number the more stuff has to be upgraded. For 200 shot you'd have to have a 255 pump, fpr, make sure your A/F ratio is good, or have some controller.

If you're looking for better mpg do some wind diffuser stuff, pump up your tires, change your driving.

I know water injection.
 

I know water injection.

What does EGR do ?
 

What does EGR do ?