Nitrotech, wouldn't the ECM retard the spark when it senses more heat to avoid Knocking?
I have been thinking about putting a resistor in line with the IAT in my Saturn to push more advance, but I was thinking that I need to fool the engine into thinking the air is cooler not hotter?
Here's the scoop. To me these engines all run rich. Why? Because of inconsistent fuel quality across the country, also condition of spark plugs, air filter, and dirty throttle bodies. This I'm sure you're well aware of.
If combustion temperatures are too high of course the knock sensors detect it and retard spark. But the question that would need to be answered is what are the exhaust gas temps with/without the IAT resistor mod. In all reality the EPA finds it more acceptable for raw fuel to be dumped out the exhaust then having high levels of NOx. The IAT only plays a small part in the injector pulsewidth formula and the affect of the resistor would change it so insignificantly that a large increase in combustion/exhaust temperature wouldn't result.
Fuel delivery generally follows the cold temp equals more fuel and hot temps equals less fuel.
I really don't understand why so many believe more fuel equals more power. To me this is so far from reality. Unless you are drag racing and stomp on the gas then of course you'll need more fuel. But if you want fuel efficiency and max power then most engines should run leaner. Its a proven fact what combustion temperature is most efficient. Delivering more fuel then the combustion pressure/cycle can support is throwing raw fuel out the exhaust. Same goes for higher octane rating burning longer. Having incomplete combustion only lowers combustion temperatures and efficiency.