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34 fordor owner 02-17-2022 07:09 PM
34 Distributor Vacuum Brake
 

Could someone explain what the vacuum brake does on a 1934 Ford dome-style distributor? Could it cause starting issues if not set right?

DavidG 02-17-2022 07:23 PM
Re: 34 Distributor Vacuum Brake
 

It retards the centrifugal advance weights to limit the amount of spark advance. At the low speed of startup, it is unlikely that the centrifugal advance weights are extended to any extent. Therefore, it is highly unlikely that it is a root cause of any starting issue.

34 fordor owner 02-17-2022 07:25 PM
Re: 34 Distributor Vacuum Brake
 

Quote:
Originally Posted by DavidG (Post 2105641)
It retards the centrifugal advance weights to limit the amount of spark advance. At the low speed of startup, it is unlikely that the centrifugal advance weights are extended to any extent. Therefore, it is highly unlikely that it is a root cause of any starting issue.

Thank you very much!

DavidG 02-17-2022 10:21 PM
Re: 34 Distributor Vacuum Brake
 

You're welcome!


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