Divided Intake and Swirl Flap Installation on a 1HD-FT
By VADUS
A lot has been said and done regarding exhaust-side improvements for cylinder breathing in our remarkable four-valve engine. This naturally includes the twin-scroll manifold and turbocharger, which enhance wave dynamics in the divided manifold and protect the cylinders during the valve overlap phase, along with a separate exhaust path for the wastegate valves, significantly reducing backpressure behind the turbine wheel under high load. However, on the intake side, most research revolves... Read more


