Quote: can you advance timing with the gauge hooked up and get the highest vac reading or is that 13 the max number?
i adjust the dist till i get the highest number I can,then adjust airscrews to fine tune idle and get the highest vac reading.
then look with a light to see where the mark on damper/scale is and go from there.
Well I've already got the timing at 20deg (dist vacuum can disconnected and plugged of course).
13"Hg is the highest I've seen the ported vacuum -I've seen it at 15" if I go off straight manifold vacuum.
WHat I could try to do is switch my vacuum gauge to the manifold vacuum then do as you say- set my advance so it's right at my max manifold reading then tune the idle mix screws to get a max reading there. I'll try that and report on the timing (and I do have timing tape on the balancer)
