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AndrewCologne AndrewCologne is offline
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Join Date: Aug 2015
Location: Cologne / Germany
Posts: 86
Backdate Fuel Distributor on a lambda based CIS to bypass the frequency valve


Im thinking about to remove the whole lambda stuff from the CIS of my 82' 911 SC (US version).
I read that the ECU unit and frequency valve are needed so the existing original Fuel distributor model provides the correct air fuel ratio.

Is it possible to just install a Fuel distributor like the one for 78-79 non lambda models (like the model 0438100031) so the frequency valve and ECU unit can be bypassed and therefore removed?

Would I be forced to change to a different WUR as well, which fits to the 0438100031 FD?
If yes, from where can I get the vaccum to be provided to the vacuum connection of the 78-79 WUR? Does there exist a vacuum connection at the throttle body of my '82 CIS beside the one provided for the ignition distributor.

Thanks a lot for clarification and best regards
911 SC 3.0, 1982, black, US model
Old 04-26-2018, 05:16 AM
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