Manifold heat cross over physics and benifits

Hi,

I have been reading alot on the purpose for heat cross over in the manifold.
Throttle response and fuel economy both are affected by this feature quite a bit on a mild or stock engine.

Anyone want to discuss fuel atomization, evaporation, manifold wetting vs. manifold pressure, manifold temps etc?

One of the first times I really decided to agree with the nesessity for manifold heat (in a street car) was when slant six dan posted a video which looked like a 50s cartoon.

I have read recently about manifold wetting and the variables involved and how they contribute to poor throttle response and of course fuel economy.

Has anyone tried to moderate the exhaust transfer thru the manifold? I know the heat valve in an exhaust manifold encourages the transfer when the engine is cold although none of my mopars have this feature any more.

My concern is turning off the heat when the engine is running at high speeds.

Heat soaking is a concern too since hot manifolds warm up the carb substantially after the car stops.

Here is some neat info that leads info accelerator pump rates vs. manifold wetting which leads into manifold heat:

http://yarchive.net/car/carb_tune.html

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