The Rectangle Port vs Cathedral Port argument in the LS engine world is as fierce as the Rectangle Port vs Oval Port argument that has been going on for decades in the Big Block Chevrolet world. But the truth is that they both are great and it depends on what you are doing and what they are going on. Or does it?
The truth will unfold right here on this test engine at Brian Tooley Racing. Or will it?
Watch.
Video Description:
FULL DYNO RESULTS, REC PORT VS CATHEDRAL PORT LS HEAD TEST. WHICH HEAD MAKES THE MOST POWER? CNC-PORTED TFS 245 CATHEDRAL PORT HEADS VS CNC-PORTED TFS 255 REC-PORT HEADS-WHO WINS? RUN WITH THE SAME (BIG) CAM, SAME COMPRESSION, SAME PAIR OF INTAKES (TWIN INTAKES TESTED ON EACH HEAD CONFIGURATION). HOW MUCH POWER ARE PORTED CATHEDRAL PORT HEADS WORTH? HOW MUCH POWER ARE PORTED REC-PORT HEADS WORTH? CHECK OUT THIS VIDEO WHERE I COMPARED TFS 245 CATH-PORT HEADS TO TFS 255 REC-PORT HEADS ON A BIG CAM, HIGH COMPRESSION 427 TEST MOTOR. CHAMBER VOLUMES WERE EVEN MATCHED FOR COMPRESSION.
