Originally Posted by onehundred80
The point is why take air from an area with lower than ambient air pressure? The air in the CAI would be a lower pressure than if it was taken from in front of the rad.
The turbo or SC would see much less of a loss percentage wise because it is sucking more air. Delta p would have much less, if any effect. That's it in a nutshell.
Dave, One more time.
Because testing has shown, it isn't lower. And because where I now have my CAI inlet, is dangerous.
I have always considered the "vents" to be a possible place for CAI intake. I tested the air pressure there with the compound gauge. It was no different than from the place I now take it, the fender box. It was also not significantly different than behind the front grill. Or from inside the passenger compartment.
Therefore I would not likely see a difference. In the end, if it were detrimental to engine performance, I would simply abandon the inlet and use the now active vent to cool the engine compartment.
But sitting in our easy chairs, cannot prove the case.
I'm sure there are significant negative AP points all over the Crossfire. There are also positive pressure points, significantly the base of the windshield. But these three points points in question did not register significant deviations from ambient unless the pitot inlet was aimed directly forward or backward to the moving air stream. Your "boundry layer" at the vents seems to be non turbulent and rather stable.
So, while it doesn't really apply here,,,,,,,
I still do not see how you can argue so hotly against the benefit of a positive pressure air flow, as you did last year, and then now suggest it matters when the air flow is a negative pressure
Perhaps the laws of physics have been amended in some way.
And,,,,,,
Perhaps I'll stop being a butthead when you can logicaly explain that reasoning.