K Jetronic Pressures
09-08-2001, 12:40 PM
#1
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K Jetronic Pressures
I know there will be lots of 911 enthusiasts out there keen to know this one!!!
I have a 1974 Porsche 911 with a 2.7 Litre fitted with K Jetronic.
The Warm Up Regulator is not vacuum operated, and it also has a throttle regulator.
Firstly, could you please tell me what the main regulated system pressure should be, and what the control pressures should be at cold and hot?
Whilst performing the control pressure test, what position should the throttle regulator be in, as it is tee'd off the WUR pressure line.
Regards
Ron Mason
Cairns
Queensland
Australia
I have a 1974 Porsche 911 with a 2.7 Litre fitted with K Jetronic.
The Warm Up Regulator is not vacuum operated, and it also has a throttle regulator.
Firstly, could you please tell me what the main regulated system pressure should be, and what the control pressures should be at cold and hot?
Whilst performing the control pressure test, what position should the throttle regulator be in, as it is tee'd off the WUR pressure line.
Regards
Ron Mason
Cairns
Queensland
Australia
09-08-2001, 01:50 PM
#2
Technical Specialist
Rennlist
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Ron,
There are 4 different warm up regulators, 3 which do not have vacuum: 911.110.927.00, 911.606.103.00, and 911.606.103.01. Do you know which you have? Or give me a temp close to what you have now (10-40 degrees C) and I can tell you the cold control pressure.
In any event, for the throttle position version, warm test specs are:
idle 2.8 to 3.0 bar
partial throttle 3.4 to 3.8 bar
full throttle 2.6 to 3.0 bar
system pressure 4.5 to 5.2 bar
leak test, after 10 mins 1.3 bar
leak test, after 20 mins 1.1 bar
There are 4 different warm up regulators, 3 which do not have vacuum: 911.110.927.00, 911.606.103.00, and 911.606.103.01. Do you know which you have? Or give me a temp close to what you have now (10-40 degrees C) and I can tell you the cold control pressure.
In any event, for the throttle position version, warm test specs are:
idle 2.8 to 3.0 bar
partial throttle 3.4 to 3.8 bar
full throttle 2.6 to 3.0 bar
system pressure 4.5 to 5.2 bar
leak test, after 10 mins 1.3 bar
leak test, after 20 mins 1.1 bar
