Tuning carb with a Vacuum Gauge

[mike16]

some of the older chiltons and motor manual have pretty large sections on rading a vacuum guage. Also some of the mid fifties troubleshooting books used in vocational automotive courses up through the early 70's have lots of info on using vacuum guages.

Not for thothin but

you want a guage with as large in diameter face as you can find and avoid ones that have fluids in side the guage to dampen needle movement.

those slight little twitches of the needle can tell you alot.

its a lost art for the most part.

I bought one with a 8" face from McMasters Carr back in the early 90's. Still use it. and know how.no computer does that