|
|
|
|
| Author |
|
|
Somewhere in the Midwest
Join Date: Oct 2001
Location: In the barn!
Posts: 12,499
|
Warren/Grady/GeorgeK anyone..explain this 934/935 CDI box
Someone posted an ad in the classifieds...interesting. Looks like a potentiometer to retard or advance ignition...is that right?
Please enlighten this idiot  
|
||
03-07-2005, 12:11 PM
|
|
|
Registered
Join Date: Dec 1999
Location: TX USA
Posts: 9,804
|
Souk,
Per Paul Frere,935 distributors had no centrifugal advance mechanism ... where you dialed the dist. body to, and tightened the nut -- that's it!!! Although I have no experience with 935s -- so don't take this as Gospel ... it would be very easy to build a variable delay stage either ahead of, or after the Schmitt Trigger of the 6-pin CDI unit. All it could do would delay the spark for a retard effect, so the distributor body adjustment would have to be dialed-in and bolted down with slightly more advance than normally needed ... and then the dial on the CDI box could be used to set and mark known advance settings. Makes a lot of sense when you think how hard on the skin of the hands it must have been to loosen and tighten the hold-down nut for the dual-plug distributor of a 935 engine! Asbestos octopus or gloves would have been handy ... just like in the days of the 550 Spyder!
__________________
Warren Hall, Jr. 1973 911S Targa ... 'Annie' 1968 340S Barracuda ... 'Rolling Thunder' |
||
|
03-07-2005, 12:33 PM
|
|
|
Registered
Join Date: Mar 2004
Location: So. Ca.
Posts: 521
|
This is a Rev Limiter on a Bosch Motorsport CD box. They moved a bit in use in 935's and were a bit finicky.
Best regards |
||
|
03-09-2005, 12:28 PM
|
|
|
Hilbilly Deluxe
|
That almost looks like a aircraft style circuit breaker.
Tom |
||
|
03-09-2005, 12:49 PM
|
|
1982 Porsche 911SC Coupe 3.2
