My CNC ported head flows from 5-13 cfm different between ports on the same head.

Main difference being 13 cfm at 500 lift.

Is that something I should be concerned about? Seems like a good bit for a CNC port.


Anyone else had more than 1 port on there heads flowed to see the difference?

 

That doesn't sound right. Who did the CNC work? Is there visually a big difference between the ports?

 

The ports look the same but you wouldnt be able to tell much from the naked eye.

Its a well known aftermarket casting.