vacuum canister question
Thread Starter
Intermediate
Joined: Mar 2009
Posts: 31
Likes: 0
From: Carlisle Pennsylvania
vacuum canister question
I have a 69 corvette and am adding an electric vacuum pump to supplement the lost engine vacuum due to a high cam. I wanted to add an additional vacuum canister to reduce the time the vacuum pump would have to operate. Any suggestions on where to splice this into the vacuum system? Should I replace the stock vacuum canister with it? Any help is appreciated, thanks!
Team Owner
Joined: Jan 2006
Posts: 37,637
Likes: 3,116
From: Crossville TN
Could it be that you have a large leak in the vacuum system somewhere? Hard to believe that one reservoir tank can't get that job done. [Note: There shouldn't be much loss of vacuum during system operation...if there are no leaks.]
Burning Brakes
Joined: Nov 2006
Posts: 954
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2022 C3 of the Year Finalist - Modified
I have a 69 corvette and am adding an electric vacuum pump to supplement the lost engine vacuum due to a high cam. I wanted to add an additional vacuum canister to reduce the time the vacuum pump would have to operate. Any suggestions on where to splice this into the vacuum system? Should I replace the stock vacuum canister with it? Any help is appreciated, thanks!
If you going to use the electric vacuum pump for all the system:
What type of electric vacuum pump you going to use?
Did you check that it strong enough to support the all system?
About adding a vacuum canister I think you should try to reduce the system volume.
I'm interesting in this because I want to separate the vacuum system to headlights + wiper door and Ignition + brake booster.
Thanks
Avner
Burning Brakes
Joined: May 2008
Posts: 1,165
Likes: 24
From: Boston MA
That is where I would mount the pump...and you don't need another can, just fix the leaks in the one you have...or where ever else the leak may be. Even a low vacuum will fill the tank...it just takes longer.
Thread Starter
Intermediate
Joined: Mar 2009
Posts: 31
Likes: 0
From: Carlisle Pennsylvania
I appreciate the help. This car does not have a brake booster so the pump would be supplying the headlights and wiper door as well as any other vacuum controls. The pump has a sensor on it that cycles off when the proper amount of vacuum is reached. Someone told me to replace the original vacuum tank with a larger one to reduce the amount the pump would have to run. Maybe I'll just try the pump first to see how much it actually runs. I don't believe there are any large vacuum leaks in the system. What is the best way to check for a vacuum leak on a corvette?
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Team Owner
Joined: Jan 2006
Posts: 37,637
Likes: 3,116
From: Crossville TN
At least, that's a very good possibility to test. My advice would be to spend $10 on a troubleshooting manual for the vacuum system in your Corvette. You will learn how to easily test your system and determine if and where you have any leaks and how to best repair them. IMO, 90%+ of the vacuum system problems only require simple, inexpensive fixes...and likely don't even need any parts replaced. However, owners don't know anything about the vacuum system and just go changing a lot of stuff unneccessarily. Learn about the system, THEN check it out and fix it. (You may even be able to find such info in the CF archives and/or on internet.)
