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911st 911st is offline
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Join Date: Jan 2004
Location: Sacramento
Posts: 7,269
I am thinking the Control Pressure Dampener as installed on the Porsche 930SE, RUF, and some other CIS cars might reduce this lean spike.

I suspect that should this metering plate over swing occur with a shift and instant WOT, as under racing conditions, it might create a significant lean issue that could result in motor damage.

Here is what the dampener looks like and it is installed in the control pressure line between the Fuel Distributor and the WUR:



Here is some discussion in trying to figure out what it was supposed to do: Control Pressure Dampener from 930SE

Stephanie's graph looks to be an excellent representation of what can happen with throttle lift on CIS and kind of brought it all togeather for me.
Old 09-15-2010, 02:44 PM
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