Quote:
Originally Posted by Formula413
I'm pretty sure the consensus is that warmer air is better for fuel economy, because any decrease in efficiency due to less ignition advance is more than offset by the decreased resistance from the throttle, which needs to open wider to create a given amount of power with warmer, and less dense, air.
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Wouldnt you want to make more Torque at a lower RPM in the power band with colder denser air that would require fewer RPM's and fewer injector pulses. Remember for throttle tip in to increase power output the ECU retards timing for a few milliseconds and sprays more fuel to ensure detonation is at a minumum.