How to adjust adjustable vacuum advance?
#1
Racer
Thread Starter
How to adjust adjustable vacuum advance?
My HEI distributor has an adjustable vacuum advance unit. How does one go about adjusting it? It has a hexagonal shape. Is it adjusted by rotating the housing? Thanks.
temvette72
temvette72
#4
Melting Slicks
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#7
Race Director
#8
Race Director
You also need to set the max advance with a limit plate of some sort.
Here is the Crane unit and their instructions.
http://69.20.53.62/pdf/254g.pdf
The easiest way to set the adjustables is using a hand vacuum pump on the cannister to tell you what the vacuum reading is when it opens, and checking with a timing lite.
Here is the Crane unit and their instructions.
http://69.20.53.62/pdf/254g.pdf
The easiest way to set the adjustables is using a hand vacuum pump on the cannister to tell you what the vacuum reading is when it opens, and checking with a timing lite.