[urq] Throttle Body Port

Ben Swann benswann at comcast.net
Fri Apr 8 22:55:18 EDT 2005

I'm still trying to confirm what this port does exactly.  Not what it is
being used for, but weather it is alsways vacuum  and directly proportional
to the airflow through the throttle body and weather the engine is under
boost or vacuum doesn't matter.

[What exactly does the throttle body port on the UrQ(and others) do?  By
that, how does it behave?  Is it using venturi effect to induce increasing
vacuum as flow through TB increases.  Is it always vacuum - even under
boost.  Is its highest reading at max flow?

Anyone know for sure?


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