QFT Jetting?
Very cool. You'll pick it up. :)
Vacuum gage and or mityvic with gage, timing light, and tachometer are all handy to have.
For checking timing much above idle, timing tape and a tach that reads above 1200 rpm is needed.
Black timing tape is easiest to read. White reflects too much.
And as for timing, can that be checked without engine running?
Not really. I assume you've already removed the distributor. I was just assuming when you reduced the timing, you or someone might have noted what it was.
I didn't even realize vacuum distributors could be tuned...... change in spring tension?
That's one adjustment available on most, but not all, vacuum advances.
The other is limiting the range of movement allowed.
The mechanical advance can be adjusted by changing the preload on the springs, or changing the springs themselves. The total movement can also be limited. Details vary with different types of distributors.
