Originally Posted by Protocav
Mass flow rate would be approximately calculated by taking the size of the motor, multiplying it by the RPM that you want to focus on (i suggest making a spreadsheet to see the mass flow rate across the RPM range) and dividing by two since the engine only exhausts every other rotation (since it is a 4 stroke). These calculations assume 100% volumetric efficiency also.
Remember that you must divide this final answer by two, because you are making a dual exhaust.
Yes, I researched and that's exactly it for the mass flow rate!
Now I need to make a thousand assumptions to actually start calculating stuff...
Any idea on how I can estimate the manifold air temperature for given RPMs?