(Morrigan, as a synonym of Morgan of Arthurian legend)

Saturday, 1 August 2009

Throttle body calcs-1

Got side tracked with building a calc tool for evaluating the effect of a throttle body. From first principles I've used the displacement of the piston to find the volume, then pressure, mass flow, new mass in cylinder and then velocity through the throttle orifice.

The calcs need to be checked through, but the order of magnitude is about correct.

5250rpm throttle opening from 1deg to 90deg
Volume (cm3)
Velocity (m/s)
Pressure (bar)
Mass (grams)

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