The Ford Barn

34 fordor owner · 02-17-2022, 07:09 PM

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

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

Quote:

Originally Posted by DavidG

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

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You're welcome!

02-17-2022, 07:09 PM	#1
34 fordor owner Senior Member Join Date: Jan 2021 Location: Alamance NC Posts: 138	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?

02-17-2022, 07:23 PM	#2
DavidG Senior Member Join Date: May 2010 Location: southeastern Michigan Posts: 10,601	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.

02-17-2022, 10:21 PM	#4
DavidG Senior Member Join Date: May 2010 Location: southeastern Michigan Posts: 10,601	Re: 34 Distributor Vacuum Brake Sponsored Links (Register now to hide all advertisements) You're welcome!