How to adjust adjustable vacuum advance?
08-25-2009, 01:07 PM
#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
08-25-2009, 07:43 PM
#4
Melting Slicks
08-25-2009, 07:58 PM
#5
Heel & Toe
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08-25-2009, 09:07 PM
#6
Instructor
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08-25-2009, 09:40 PM
#7
Race Director
08-25-2009, 10:13 PM
#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.
