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Thermo Time Valve (TTV) Vacuum Lines
Hi Everyone -
I am looking for confirmation on the vacuum line routing for the thermo time valve (TTV) on my '77 911S with a 033 WUR (where the vac port is on top). I've searched the forums for a vacuum line diagram for the '77 and have come across various conflicting versions of the diagram so hoping someone here can help. The TTV has 2 vac ports - the center port and what I'm calling the offset port.  I'm looking to confirm the following: CENTER PORT - This gets connected to the intake vacuum source, in my case a T between the distributor advance and the lower port on the front side of the throttle body OFFSET PORT - This gets connected to the vacuum connection on the WUR, in my case on the top port of the 033 Thanks! |
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05-28-2022, 02:03 PM
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Correct. Side goes to the top of the WUR. Center combines with dizzy vacuum to port #10 see attached photo.
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Diederick I drive a US import 1977 911. Formerly owned by a woman in California named Ginger - which appropriately led to the nickname. IG: no dedicated account but photos are posted with #ginger77 |
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05-28-2022, 02:14 PM
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Perfect, thanks it seems the previous owner had those two lines swapped, so that might explain some of the cold start issues i've been having after verifying all CIS pressures and vac leaks.
Last edited by jma0506; 05-28-2022 at 02:20 PM.. |
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05-28-2022, 02:15 PM
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