ddunbar wrote:

Hello Paul,
For aircraft use I ask this question.
What are the pro's and against of putting the throttle body before the
turbo compressor.
Mazda uses the 3 throat body for control of low down torque and flexibility but
a fixed pitch prop is quite different.
What are your thoughts on this.


--
Best regards,
 ddunbar                          mailto:ddunbar@echidna.id.au

Good question Don. Hugh MacInnes's book "Turbochargers" HP Books
suggest putting the throttle between the compressor and engine
to prevent a vacuum on the inlet side when the throttle is suddenly 
closed at high RPM. That could suck oil out of the turbo and into the intake
system past the seals page 23 and 24. On page 103 there is an aircraft
diagram with the carb on the outlet side. That is where I am planning
to put my slide throttle. However most of the
diagrams in the book have a carb on the inlet side.

A three throat body will have more intake manifold pressure loss than a one throat 
throttle of the same area. Make it big and make it clean and simple simple.

Paul Lamar
 
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