w108,107 Parts Hoarder
Date registered: Jun 2010
Vehicle: slc5.0cab 280sl5sp 280se4.5 500sl92 GONE:280sl79 4xW114/5 3x450sl72-3 280slc4sp81 280s69 73,81SLCs
Location: Philadelphia Area
Mentioned: 27 Post(s)
Quoted: 1574 Post(s)
No. I think he is saying once you get the timing fixed with a new diaphragm, then switch to hot spark or pertronix.
I think it says above that the vacuum diaphragm is for vacuum retard. Right?
My 1973 v8 cars had a vacuum retard on the distributor that essentially retards the timing at idle, and I guess when you are cruising with your foot off the throttle pedal (creating high vacuum). The vacuum retard on my 1973 450sl cars shuts off when the AC is turned on (supposedly to overcome the extra drag of the AC compressor with some advanced timing).
Given the fact that the vacuum retard turns off with the AC on, I wonder just how important it is for anything other than emissions. I would probably always be more concerned about making sure the mechanical centripetal advance mechanism is working correctly giving you the correct timing at higher RPMs.
My dream car is a classic sporty five speed (stick+overdrive) convertible that seats five. If, you want 70's-80's Mercedes tuner wheels, let me know.