Manifold heat cross over physics and benifits

Rice Nuker said

Krazy,
We are still going around and around but that is fine with me. I reckon you are disagreeing w me because my posts must not be clear or you have not read them all. I have literally been stating exactly what you stated below, for this entire thread. :) I agree.

The only thing I may beg to differ on is the density of intake charge based on two engines: One a 1975 V8 w all factory systems functioning perfectly and the other a 2001 4.7 Dodge with all systems good (or any modern v8).
Both engines running in a test cell with identical air inlet temp.
plenum tuning more economically due to manufacturing advantages.

Click to expand...

I thought that this thread was trying to analyze how an engine will run with or without a heat crossover passage operable. What is the purpose of it and how will the engine be affected if it was blocked off. To make a proper comparison, you have to isolate and change only one variable at a time or your rusults will not show how that particular change affected the engine.


Trying to compare a 1975 engine to a 2001 engine is trying to compare apples to oranges. Too many variables to isolate how changing just one will affect the process. And why are you choosing 75 model year that had lots of emissions problems to affect the engines and how they ran. Try a 68 - 71 era engine and isolate the heat crossover and explain the affects the engine.

There was a couple of statements worded so that someone may get the wrong idea and I was just trying to make it clearer.