Basic Configuration of the CIS, 1973.5 - 1975

basic diagram

This diagram represents the CIS fuel configuration for 1973.5 and 1974 for both the US and the Euro models. In 1975, the US 911 got a vacuum operated WUR which replaced both the non-vacuum WUR and the TCPR of the US 1974 911. However, the 1975 Euro model 911 retained both the '74 WUR and the TCPR. For the US 1975 CIS configuration just eliminate the TCPR from the above diagram.

For a previously little-known Porsche Service and Training Instruction booklet in PDF format, click here. This is for the time frame of the 911 CIS introduction - January 1973.

Summary of component usage on the 1973 - 1975 911 models
(under construction)

The following information was taken from a Porsche micro-fiche recently unearthed and from personal observation of actual engines. Blanks indicate an open request to help fill in.

1973.5 - 1974 US and Euro, 1975 911 US, 1975 Euro CIS
Year Model Engine Dates Component Porsche # Bosch #
1973.5 911T-K 2.4 1.73 - 7.73 Fuel Distributor   0 438 100 002
" " 2.4 1.73 - 7.73 WUR 911 --- --- -- 0 438 140 001
" " 2.4   TCPR 911 110 916 00** 0 438 160 01
" " 2.4   Air Flow Sensor EP/LVL 8/2*
911 110**
0 438 120 002
" " 2.4   Decel Valve 911 --- --- --  
        Accumulator 911 --- --- -- 0 438 170 002
             
1974 911, 911S 2.7 8.73 - 7.74 Fuel Distributor EP/LKM 6/3* 0 438 100 004
" 911, 911S 2.7 8.73 - 2.74/
2.74 - 7.74
WUR EP/LKW 1/1* 0 438 140 001/
0 438 140 008
  911, 911S 2.7   TCPR EP/LKW 1/1* 0 438 160 001
  911, 911S 2.7   Air Flow Sensor EP/LKL 6/4* 0 438 120 004
  911, 911S 2.7   Decel Valve   0 280 160 111
  911, 911S 2.7   Accumulator    
             
1975 US 911,911S 2.7   FD    
    2.7   WUR   0438 140 009
    2.7        
* From actual component label
** From Porsche parts catalog