CHAPTER 23 - ENGINE AND COWLING

A 20b (3-rotor) Mazda Engine Model supplied by Bruce Turrentine at Rotary Resources with Proposed Intake Manifold and Exhaust System. The Propellor Speed Reduction Unit (PSRU) is from Tracy Crook at Real World Solutions.  
 

Tracy Crook is assisting in the design of the Intake Manifold. Model 1 with fuel rail and injectors mounted on the plenum. This location is too far from the ports for optimum starting and idle.

  Intake Manifold Model 2 with fuel rail and injectors mounted closer to the ports. This location is still not ideal for starting and idle.
 

Intake Manifold Model 3 with fuel rail and injectors adjacent to the ports. This location is optimal for starting and idle, but must be shielded from the exhaust sytem.

  Intake Manifold Model 4 with shielded fuel rail and injectors adjacent to the ports. Note space saving shorter plenum. However, the runners are unequal lengths.