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911st 911st is offline
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Join Date: Jan 2004
Location: Sacramento
Posts: 7,269
Well done.

How about donating your old WUR for study. Maybe someone could document how to convert to a vac-sensing WUR from the boost sensing. Lee Rice used to do this on his "Rice Fueler" WUR years ago.

The boost sensing WUR's reduce the resistance of the metering plate to movement upon acceleration. Doing this would increase pre-boost response if set up right.

Of course this is not a good fit with a set up on a car that is set up to dump to much fuel on boost. However, I believe a heavily modified 930 could be set up to still work with this by getting the control pressures right for the fuel head used.

This would not only reduce resistance at the metering plate but could reduce the lean surge off idle that is typical with CIS.

That seems to be Porsches intent with the 3.0T's. Emissions were probably part of the reason for the boost triggered unit on the 3.3T's.
Old 10-19-2009, 07:54 AM
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