Quote:
Originally Posted by wwest
"80 SC with a rev-limiting distributor rotor..
WHY....?
The rev-limiting is done electronically.
CDI ignition shuts down at rev-limit and "trigger" signal goes to the rev-limiter which "switches-off" the fuel pump if/as the engine reaches over-rev.
BANG...!! if you reach the rev limit rapidly, under full thrust, feels as if something broke, something SERIOUS...!
Otherwise, slow RPM rise to over-rev limit kick-in, just prevents the engine from over-reving due to being under power.
If there is such a thing as a rev-limiting rotor then it will have a MATCHING, "paired", distributor cap as it would be EXTREMELY impractical, unwise, to change the base timing.
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Pre-'78 cars; 2.7, 2.4 and 2.2 engines did use rev-limiting rotors and generally speaking, functioned very well. They quit doing that when catalytic converters began being installed since a fuel cut-off type rev limiter became necessary.
One should never assume that the timing remains unchanged between the two types of rotors, given the consequences of too much timing in these engines. Rotor phasing is a concern so timing should be checked and adjusted as necessary.