Quote:

Remove 1 cc and get 300 cfm???!!!



That's what I said! I sugested that a 300CFM port on a small block head for a stock stroke 360 is going to have such low velocity at "street" rpm that it will be a total dog, but this guy said, and I quote:

Quote:

When I port heads I also use a velocity probe shoved in the port. As I test airflow (cfm) I also watch velocity I shoot for 350fps. Just becasue a port does not flow much air does not mean it has great velocity. It has to be able to move air to build velocity at a given CSA. We are not changing the volume of the head by porting it in most cases. I would say if we have picked up 1 cc that would be all.





but, I'm not pretending to be an expert who's ported a ton of heads and built hundreds of engines, all I know is what I've picked up from reading about what you guys have done on here. so my mind is open and I'm looking to learn some more, just in case what I THOUGHT I learned about head flow/velocity/port work etc. is wrong.

**Photobucket sucks**