Originally Posted by First opel 1981
Are they both Bosch? I can tell by looking at the housings and the shafts that there are lots of differences between the two. You should be able to install the new one but the general settings will need to be thought out. Of course saying that because is easy because I swap parts on machines all the time. Trying to tell someone how to do it isn't my strong suit though.
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Yes they're both Bosch. I had the new one in the car last night and it running great once I got it started and rotated it a whole bunch clockwise. Just went back out tonight and it would not go.
(I also re-read the Compu-fire instructions and noticed that there is a correct orientation for the disc which I paid no attention to yesterday so if it was wrong that may have had an effect as well.)
Edit...
From another thread:
Originally Posted by calvin
NOTE
If you take your vacuum advance off like I did be sure to cover the hole (and any other holes) where it went not to let light through or you will end up like me, very frustrated and wondering why your car won't start for 2 days because there is too much light and its messing up the optical unit.
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I'll have to see to that. (although I don't think this matters for the Compufire as it's magnetic)
and from Bob's distributor specs:
1975 - 25 mechanical advance
5 degrees static timing
No vacuum advance unit
30 degrees total
So perhaps the lobe-notch thing is the 5 degrees static timing