![]() All the formulas I have learned are true and the words from the dude that taught me how to port, "Engines run on math" is also true. In those years I have found that the majority of the motorcycles that were used on the street did not benefit from heads with the larger valves or what I thought was my best port design. ![]() ![]() Over the last 15 years I have used many different combinations of components and port designs in the quest for the best flow numbers while keeping port velocity up. ![]() Big Boyz Head Porting is taking a different approach to Harley-Davidson HEAD PORTING.
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