Thread: MPG aids
View Single Post
Old 12-13-2020, 03:15 PM   #20 (permalink)
Isaac Zachary
High Altitude Hybrid
Join Date: Dec 2020
Location: Gunnison, CO
Posts: 1,320

Avalon - '13 Toyota Avalon HV
90 day: 40.45 mpg (US)

Prius - '06 Toyota Prius
Thanks: 711
Thanked 386 Times in 298 Posts
After doing a little research, your 2 barrel Autolite 2150 carb does indead have a vacuum actuated power valve.

Again, the question isn't if more or less vacuum is better or worse for efficiency?, but rather: At what vacuum level does the power valve go from closed to open. Figuring that out and marking that line on your vacuum gauge will be of better help than just going by your gauge's generic "poor/good" fuel mileage drawings.
  Reply With Quote