It's 92-98o on a 2 cyl. scale
or 46-49o on a 4 cyl. scale
or 34,5-36,7o on a 6 cyl. scale
or 23-24,5o on a 8 cyl. scale
Easiest is to measure how Americans used to do it, in % so you can forget about scales and don't need to multiply or divide.
It's 51,1-54,4%.
When adjusting, bear in mind the gap tends to decrease over time and not increase. So maybe it's better to start a bit on the wide side (lower number) in the range.
For those of you that prefer a dwellmeter over a feeler gauge, here is a tip.
Years ago I have attached two ‘blind’ extra wires to my coils (12V-) both with a female connector at their end. Once you've set your timing correctly, these wires allow quick diagnoses later on. If you are satisfied with the timing, write down the dwell for future reference. Almost all changes in timing originate at the contactbreakers. When the dwell changes, so does the timing. When you suspect the timing is off, before opening the ignition cover you can now simply connect the dwellmeter to either extra lead 1&4 or 2&3 and verify if dwellangle is still the same or has changed. It’s important ofcourse that those connectors are well shielded to avoid ground. That's why I choose mine to be female. Mine are accessible close to the ignition key (old model, under the tank).
I have had these wires attached for years now. What I like is that I can check really quick without even having to remove the ignitioncover.
Another remark.
If you've done it correctly, in future you can adjust the timing by just setting the contactbreakers gap and you can leave the platescrews untouched. That's how mechanics used to do it.
In this forum there is far too much adjusting of timing plates (why? because it is in a book?) as there is floattang bending and separating of carbs. KISS.
