[T2] distributor rotors

[Al Brase]

Rev limiter. They were used in many cars. 1978 bus for sure had a 5400rpm
one. Early Porsche 911 had various 6500, 6800, 7300 limits. late Bosch
injection had built in rev limiters. Breathing / available revs depend on
load. So yes, choked off intake makes it pretty slow revving. Not so much
free revving or down hill.
Al


On Fri, Aug 17, 2018 at 5:05 AM, Robert Mann <robtmann7 at gmail.com> wrote:

>     I suddenly figured I should try the spare rotor which came with my bus
> –  made in England, designated R.66 'replacing Bosch 1.234.332.074'.  The
> rotor in the distributor is marked Bosch 1.234.332 {molded in} 192 4500
> {stamped, bigger characters}.  The spare is like most rotors I've seen.
> The genuine Bosch Germany is v different, with a spring-loaded brass slider
> which can apparently get centrifuged to touch a spring-steel vertical
> prong.
>     Just to complicate things, the dizzie's serial number reveals it's from
> a '62 Beetle.
>     The R.66 seems to work fine, tho' I've not tested top speed yet.
>      Is the Bosch rotor somehow responsible for centrifugal advance?  Or is
> the centrifuging brass slider intended to be a rev limiter?  Top speed is a
> disappointing 72 mph downhill  ...  but no misfiring such as I expect from
> a rev limiter.  Anyhow is not the VW Typ 1 motor limited by choked-off
> breathing?
>
> Robt Mann
> '73 1600 dp Devon
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