Intake temps

[Nick M]

One thing you can try to avoid is high underhood temps. Your airflow meter will respond in kind by retarding the timing of the spark, to stave off that pre-ignition.

 

[Insidious Surmiser]

Do you think International trucks put heater grids in the intake manifold after the intercooler in just northern climates? The air has to be heated to vaporize the fuel and burn it. This is why it is compressed to very small area in the first place. The coolant is for constant temps, not to hot, not too cold. If you have too much heat, power is lost. Not because hot air is less dense, because of pre-ignition. The heat is a good thing for burning the fuel. But too much makes it burn early while still on the compression stroke.

good point. I thought it that wasn't an issue with fuel injection, but I suppose it still is.

Because there's such a pressure drop due to Bernoulli as in carbs. Not. So says this major league prick...

was waiting for you to chime in

2JZ-GTE has a heated intake, if anyone cares.....

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