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

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
Stage 3 turbine .63 AR
A2W I/C, 40 LB/HR
MS2E, 60-2 Direct Coil Control
3" Exh, AEM W/B O2
Underdrive Alt. and P/S Pulleys,
Vented Rear Discs, .034 Booster.
3.07 diffs 1st Gear Start

90 300CE 104.980
Milled & ported head, 10.3:1 compression
197° intake cam w/20° advancer
Tuned CIS ECU
4° ignition advance
PCS TCM2000, built 722.6
600W networked suction fan
Sportline sway bars
V8 rear subframe, Quaife ATB 3.06 diff

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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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