Manifold heat cross over physics and benifits

Rusty, I reckon that's why MPFI manifolds / systems are the best of both worlds. Amongst a multitude of other benefits, they allow a cool(ish) denser charge with out the vaporization and fuel distribution issues of a wet manifold.

For a carbureted engine it is primarily effecting accelerator pump effect, cold drivability, improved initial fuel economy and decreased engine wear. I totally agree that it ain't for making maximum HP :) although a warm intake may help initial throttle response.

RustyRatRod said

It was always explained to me that the cooler the charge is, the denser the mixture. That molecules were smaller because they were cooler and that allowed more air and fuel into the cylinders and that's what caused more power from a cooler intake charge. So, taking that theory into account, fuel mileage could suffer from a cooler mixture. If all that BS is true.

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