Charles Servedio just posted a video porting SBM cast iron intake with Thermoquad

It seems to me intakes can make more hp per cfm than heads, what I mean is the rule of thumb is an engine can make at least 2 hp per cfm (apparently max is 2.5 hp per cfm) but you generally don't see that I use 1.8 hp per cfm. But a lot of intakes will bring the overall flow down but still be able to make 400-500+ hp stock unported even though there flow would suggests otherwise. Like to see more intake flow data and dyno results but seems like you can get pretty far with an unported intake.