Bosch Vacuum Advance Modules

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Page created by T Mar 10th 2009:

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Photo by Jacks showing a close up of the Vacuum Advance Module. Note the green 6 degree Sticker and the number 212 stamped on it. Click to Enlargen.


Bosch Vacuum Advance Modules:

How to Identify a Bosch Vacuum Advance Module:

The colour and number on a Bosch Vacuum Advance Module identifies its response to Vacuum. These figures apply when the Module is used in a 6 or 8 cylinder Bosch HEI Distributor.  

Sticker
 Static Advance
 6 degrees
 6 degrees BTDC
 12 degrees
 12 degrees BTDC

 

Static Timing:

The Coloured Sticker on the Vacuum Advance Module determines the Static Advance Figure that should be set.    

 Sticker  Degrees of Response @ vacuum
 Pullrod  Degrees of Response @ vacuum
 Blue 6 degrees
  0 @ 14 - 21 kpa
   19 -23 @ 47 kpa
 Red 6 degrees
  0 @ 14 - 21 kpa
   16 - 20 @ 44 kpa
 Green 6 degrees
  0 @ 14 - 21 kpa
 212  11 - 15 @ 37 kpa
 Yellow 6 degrees
  0 @ 14 - 21 kpa
   11 - 15 @ 37 kpa
 None   0 @ 22 - 29 kpa
 212  14 - 18 @ 47 kpa
 Blue Dot
  0 @ 22 - 29 kpa     14 - 18  @ 47kpa
12 degrees
Unknown
   12 degrees at full vacuum
       

 

Pullrod Numbers:

The Pullrod number describes the tension of the spring inside the Module and the total distance the pullrod can travel after it has been installed in the Distributor. Before installation, the pullrod travel will be much greater ( 4 times typically).

Photo by Jacks showing a close up of the Vacuum Advance Module. The 6 degrees is the static Ignition Timing for the Engine it's used in.  The number 212 defines the Spring tension and Pullrod  travel. 212 defines the maximum advance and the Module's Sensitivity to Vacuum. Click to Enlargen.

   

 Pullrod Number 
 Module Type  Spring Tension 
Travel
107 Imperial 1 0.070"
 165  Imperial
 1  0.065"
 212  Metric  2  1.2 mm
 214  Metric  2  1.4 mm
 230  Metric  2  3.0 mm

 

Links:

Advance Module Thread

Replacement Advance Module Thread

New Advance Vacuum Module

Terms:

Terms

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