Feb 4, 2007 #1 H Hot Air E85 and S.E./Carolinas Moderator Staff member Joined Nov 11, 2002 Messages 3,102 Can anyone tell me what diameter of intake and exhaust valves are and what the flow rate (cfm) is for Champion Iron heads? I couldn't find it on Champions web site. Conrad
Can anyone tell me what diameter of intake and exhaust valves are and what the flow rate (cfm) is for Champion Iron heads? I couldn't find it on Champions web site. Conrad
Feb 6, 2007 #2 4 49-blues Active Member Joined May 30, 2001 Messages 7,628 I think the valves are 1.77" intake and 1.50" exhaust-cfm not sure.