setting carb with vacuum gauge
Yep, same carb you sold me n Pops. I just chkd the Eddy manual and it states to adjust with screws, but I would rather use the gauge.
So simply adjust each idle mix screws until max vac is reached without increasing idle rpm right?
If the screws are off even a little, idle speed WILL change. Max vacuum also pretty much = highest idle speed.
Make sure engine is COMPLETELY warm to normal temp, and that no vacuum accessories are unplugged. On original later cars this would mean AC controls, booster, smog devices (heated air filter) etc
If idle changes much as you adjust, "re" adjust idle speed screw to get idle speed "where you want." As you get both the speed and the mixture closer and closer to "where they should be" these changes will be less and less
TIMING must be adjusted FIRST, but an extreme example might be a new engine with unknown distributor and carb. "Everything" will be "off." So "rough in" timing, "rough in" mixture and speed, until you get it close enough to set timing
AFTER YOU GET TIMING set "you are happy," from that point leave timing alone.
Then finish up with vacuum / idle mixture and keep idle speed in check.
