Rev Limiter Rotor - howzit work?

There's a weight and spring on the rotor. When the rpms get too high the weight swings outwards in spite of the spring holding it in. When the weight swings out it touches the high voltage end of the rotor, grouding it to the distributor shaft.

No more spark to the cylinders; no further engine power until the engine speed falls below the point where the weight gets pulled back in.

-

----------------------------------------------- Jim Adney snipped-for-privacy@vwtype3.org Madison, WI 53711 USA

-----------------------------------------------

centrifical.....when the rpm of the rotor is to a preset "limit" the rotor (which kinda acts like a mechanical advance 009) breaks the "circuit" untill it is back below the rpm "limit"...

------------------- Chris Perdue

*All opinions are those of the author of this post* "Sometimes you're the windshield, sometimes you're the bug" reply take your PANTS off

There's a spring loaded "weight" on the rotor that gets pushed out by centrifugal forces, and when the rotor turns fast enough, the forces push it out far enough for the metal weight to touch the stopper plate. The stopper plate runs through the rotor bakelite and grounds through the distributor shaft. Therefore grounding the spark path from the rotor to the shaft. No spark goes to the plugs until the revs drop back down and the weight starts to retract.

These dare adjustable by the way, like most things in life that first appear not to be.

There are different cut-out limits out there, I think most are 4500 -

4800rpm. Replace spring with stiffer one or reduce mass (shorten it if you can so it also needs to travel further before it makes contact) of the weight to jack teh cut out limit higher.

Jan

I can take pictures of one if anyone is interested.

Jan

i have one....it was in a bosch distributor that was on my 2002 BMW when i got it years ago(the distributor for the bmw's is a dead ringer for a vw (bosch) distributor till you remove it....

------------------- Chris Perdue

*All opinions are those of the author of this post* "Sometimes you're the windshield, sometimes you're the bug" reply take your PANTS off