intake design

[Vinny Loccisano]

    First off I would like to introduce myself.  I am a Mechanical engineering
    major at Lehigh University, working on our second Formula SAE car.  This
    car is based around a 600 cc motorcycle engine.  We're in the process of
    incorporating electronic fuel injection into the car.  By the restrictions
    of the competition, we're forced to run a a 20 mm restrictor in our
    intake. The factory carbs must be replaced with a single unit (if we were
    staying with carbs that is).  I was wondering if anyone has any knowledge
    on determining proper intake port length for this application.  Currently
    we are in the process of machining a 2 inch throttle body (placed before
    the restrictor) The EFI unit is a Bosche Motronic unit from a Porsche 962.
    We will be using mass air flow, and 13 or 16 lb injectors.  Any ideas on
    what would be the best intake setup, such as an airbox vs. individual
    runners.  Any thoughts about proper length.




                                    Thanks in advance
                                        Vinny Loccisano
                                        Lehigh University
                                        vpl2 at lehigh.edu
                                        (610) 861-4458