I believe I may be able to straighten out the confusion;
When Chris said this;
"A camshaft that might work well for a vehicle with a ported factory manifold and 39 psi boost levels would clearly not be the best choice for someone with a better flowing intake and exhaust manifold running sub 25 psi."
He was trying to take a shot at the Charger, so he Failed to see the Contradiction in what he said. He (Chris) and many others I'm sure, still Don't Get that the Charger IS the eg. of an 8v with a Better flowing intake And exhaust manifold, capable of as much or more power than pretty well any other out there (Excluding Warren's of course
) at sub 25psi.
Even with the Holset that I am Purposely running the small 9cm turbine housing on to give the car GREAT street drivability, it still lays down Well over 400WHP @ sub 25psi.
IF I wanted to make it a Drag car only, and didn't care about street driving "threshold" I could make 500WHP @ sub 25psi easy. (really surprised that so few realize this after all this time)
So, to even say header vs ported stock exhaust manifold is to Not understand what you're talking about. Remember (and this is Not a shot, just the Truth) Chris is a Salesperson. He did Not design this cam and can answer No Q's himself on it. All he can do it forward the Q's to "someone who knows" (or hopefully does) and then attempt to regurgitate the answers accurately. (and there is Nothing wrong with this, as long as everyone Understand that is what is happening)
The more Proper way to say it would be " This cam may not work as well in a set-up that has High drive pressure vs one that has Low drive pressure (a much better flowing exhaust set-up) because header or exhaust mani has Zero to do with this. You can bolt a header on and have just as high Or higher drive pressure as a ported stocker, there are Way more components to consider than jusy cast exhaust manifold vs header!