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-   -   Control Pressure Question -- Higher equals Richer or Higher equals Leaner? (http://forums.pelicanparts.com/porsche-911-technical-forum/299452-control-pressure-question-higher-equals-richer-higher-equals-leaner.html)

dduclaux 08-18-2006 12:25 PM
Control Pressure Question -- Higher equals Richer or Higher equals Leaner?
 
Does higher control pressure (WUR pressure) richen the A/F mixture or lean the A/F mixture?

Riddle me this: why do we increase the control pressure via the vacuum port on the WUR on acceleration?

stlrj 08-18-2006 04:58 PM
Higher control pressure leans the mixture. The vacuum on the WUR actually reduces the control pressure for increased throttle response when the throttle opens and the vacuum drops off.

Cheers,

Joe


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