Manifold heat cross over physics and benifits

Rice Nuker said

Best of both worlds would suite me fine. I always completely warm up to operating temp b4 driving a carbureted car.

The debate is weighted when a person cold starts and drives to the bank then the car is off for 30 minutes and this is repeated all day.

During less than optimal operating temperatures the carbureted car is required to run considerably richer which is very wasteful on fuel and accelerates engine wear dramatically.

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yes, but driving a cold engine shortly after starting wasts less fuel than waiting for it to completely warm up to operating temperature before driving it. You are wasting all of the fuel during the richest burning time and going nowhere.

I had a 2nd gen Barracuda with a 318 with dual exh, 4bbl electric choke, and electronic ignition. When the choke was hooked up and set properly, I could go out in 0°F (or colder) winter weather, pump the gas pedal twice, crank the engine, wait for the oil pressure gage to come up, then put it in drive and drive away without any stumble (heat crossovers were covered).

Driving a cold engine gets better MPG than waiting for it to completely warm up before driving it. While it warms up, you are getting 0 MPG which really kills your average. If you have a newer car that reads out current and average MPG, try starting it and idling it to running temp without moving and see what that does to your average MPG.

You have to set it up for the conditions that you are going to drive it in....