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#1
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'67 Vacuum Dashpot Adjustment
I have one of these vacuum diaphragm dashpots on my 67 GTO automatic. I can't find anything about how to adjust it.
I think I remember seeing something about getting idle speed and curb idle set then adjust the threaded part of the dashpot until it touches the bracket + 2 turns more(??) I don't know if that's right or not, it has been a long time. There is nothing I could find in the Pontiac service manual, of course I could have missed it. Anyone remember how to set this thing? Thanks!
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1967 Pontiac GTO 1965 Olds Cutlass 2014 Ford Mustang ----------------------------------- GTO-The Great One for 1967 ----------------------------------- |
The Following User Says Thank You to 67TIGER For This Useful Post: | ||
#2
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Did you ever find information or documentation on that dashpot adjustment?
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#3
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John, I saw your post over on the HAMB. There are a couple carb gurus on this site that might be able to answer the question if you post it here.
I’d start a new thread
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‘63 LeMans- ‘69 400 w/ original transaxle. 2.69 gears. ‘55 Catalina ‘62 Mercury Meteor-all original, bought new by my grandfather 71' GTO -original 400/4-speed/3.23 posi 13.95 @ 102.1 on street tires @ 4055lbs.-now my sons ride |
The Following User Says Thank You to 67drake For This Useful Post: | ||
#4
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The adjustment instructions are in the Pontiac Chassis Service manual. 64,65,66, & 67 manuals all target ~1050 RPM [(1030 to 1080RPM) after the Throttle Return Check (dashpot) vacuum hose is disconnected and plugged with the engine warmed up..
Check if the dash pot holds a vaccum The diaphrams do tear and will leak due to its age and wear. The 67 quadrajet version is unique due to the bracket and is not serviceable; however, you can get them functional by substituting a diaphram from the still available 2 barrel or carter 4 barrel if you modify the rolled edge to screw together. A 1-72 thread works well. |
The Following User Says Thank You to gto4ben For This Useful Post: | ||
#5
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Thanks a million. I greatly appreciate it.
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