CNC Sportsman Porting

   CNC Sportsman Porting: The Ultimate in Ported Cylinder Heads

               The fastest way around the race track for maximum output engines

Our CNC Sportsman ported heads have a more developed and larger intake ports that puts more focus  on air flow over .575” lift.  They feature fully CNC machined intake ports, exhaust ports and combustion chambers.  The valve guides are honed to proper clearance for your application and the seats are machined to the final size.

What is the difference between the S.S.T Ported and CNC Sportsman Ported heads on a maximum output motor?   Well, for instance, we port the Chevy ‘492 heads for road racing classes where roller cams are used and engine rpm is in the 7,600 rpm range.  The CNC Sportsman Ported ‘492 heads will flow 250 cfm on the intake side; where as the same head with our S.S.T Porting will flow about 235 cfm. The difference in performance is 20 to 30 horsepower in the upper rpm ranges in this application.

Another popular head is the 200cc Dart Iron Eagle Platinum series.  For maximum output small blocks engines with roller cams and 7,600 plus rpm we recommend the CNC Sportsman Ported heads because the air flow is 15 – 20  cfm more over .575” lift vs. S.S.T Porting.  This additional air flow and intake volume translates into a 15 to 20 horsepower gain in this type of wide open application.  We have several CNC programs for the 200cc Dart Iron Eagle Platinum heads. 

We have several intake port designs for the 200cc Dart

Platinum cylinder heads ranging from 205cc's to over 230cc's. The port on the left matches the Fel Pro           1289 Fast Burn gasket. This is our "Super Model" port   ( because it's tall and skinny). This port will  match the     Edelbrock 2814 intake manifold.  The Edelbrock 2814 intake is used on the raised runner  Vortec Bow-Tie         heads. The port on the right will match the Edelbrock 2925 Super Victor intake manifold, which uses the Fel Pro 1206 gasket.