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  #1  
Old 10-29-2017, 10:32 AM
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1992 mercedes 300ce

i have 2 mercedes 300ce cars i have converted to 5 speed manuals. on one i removed the fuel injection and ignition and refitted a 48mm idf weber and adapted a vacuum advanced 1975 ford grenada distributor with a gmc modual. the car runs AWESOME. porsche fast. i have a question regarding cam advance. i am setting up a microswitch to activate this. is this circuit normally open? and at what rpm does it activate. thanks! this is the dual cam m104 engine


i did find out the circuit is normally open, attached the microswitch and set it to activate at 2000 rpm. im thinking this is a safe estimate on rpm


Last edited by william g; 10-29-2017 at 04:27 PM.
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Old 10-29-2017, 04:53 PM
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I don't remember the exact numbers but it goes something like this.

Crank-off
1200rpm-on
4700rpm -off
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90 300TE 4-M
Turbo 103, T3/T04E 50 trim
T04B cover .60 AR
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90 300CE
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Milled & ported head, 10.3:1 compression
197 intake cam w/20 advancer
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600W networked suction fan
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  #3  
Old 10-29-2017, 04:55 PM
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Exact RPM ranges are in the FSM, however it's also based on engine load IIRC... won't be easy to make this work well.

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  #4  
Old 10-29-2017, 05:03 PM
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thanks! the car runs great now. just curios if this will make a difference. i can fabricate a shaped cam to activate then deactivate at 4700 rpm.

the easy stuff is just that....easy

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