Compressed air for dome control leak
Thread Starter
Launching!
Joined: Jun 2012
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From: Pennsylvania
Compressed air for dome control leak I recently added dome control via compressed air to my car. Found numerous leaks in the system (fittings on the tank, wastegates, Mac valves etc.) but can’t track the last one down. I soaped the whole system at every fitting, found no more leaks and the compressor still kicks on about every 10-15 min. I also left the wastegates hooked up to the compressed air source but Unbolted them from the mid pipe and couldn’t hear any leaks internally. Wastegates are on3 44mm using a Vlair 1gal air tank. The whole system is plumbed with hose and barbed fittings which I may try push to connect fittings to see if that helps. Didn’t know if any one had a similar issue or had any ideas. Worst case scenario I’ll pull the fuse and only use the air system at the track. Thanks for any help!
Teching In
Joined: Jun 2019
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Do you have a check valve or one way valve from the compressor to the tank? Even the stock viair one that comes on the compressors is junk and notorious for leaking air pressure back through the compressor once it shuts down.
Thread Starter
Launching!
Joined: Jun 2012
Posts: 249
Likes: 36
From: Pennsylvania
edit: yeah I believe there is a check valve in the line that hooks into the tank. There were instructions to not over tighten it
Last edited by 47ford; May 9, 2020 at 06:17 PM.
Thread Starter
Launching!
Joined: Jun 2012
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From: Pennsylvania
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Joined: Jun 2019
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If you have verified all other connections are air tight I would go with that one being faulty. You can just simply add a new one in between the tank and compressor in the appropriate direction and be done with it. You don’t need to remove the old one unless you want to and it’s kind of a pain and may cause you to replace the entire leader line if something breaks or bends.
Thread Starter
Launching!
Joined: Jun 2012
Posts: 249
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From: Pennsylvania
Copy that I just ordered a new check valve to try that since they are cheap.... I’m going to try and narrow down the issue by blocking the system off in steps and see if I notice a leak.... so I’ll just plug the feed line and see if the tank bleeds air off then the Mac valves and end at the wastegates etc
Thread Starter
Launching!
Joined: Jun 2012
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From: Pennsylvania
I have a gauge on the regulator which I normally set to 60psi but for these testing purposes I have been turning the regulator up to like 100psi to see if it is leaking off.... so far it has been leaking off like 15 psi through out a whole day
Teching In
Joined: Jun 2019
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Yeah you are in the right track! 15psi a day isn’t bad but still annoying especially on a single gallon tank. Replace the check valve and go back over every joint with soapy water. Closing off each system like you were saying will really help you narrow it down.
if only it was something that you could see leaking this would be so much easier to fix haha
if only it was something that you could see leaking this would be so much easier to fix haha
Thread Starter
Launching!
Joined: Jun 2012
Posts: 249
Likes: 36
From: Pennsylvania
I installed the new check valve and it didn’t drop a single psi over 24 hrs. So I’m guessing that was the majority of the problem. I am going to test the rest of the system but I think I got a handle on it! Thanks for the help!
