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What would cause the secondary injector bungs to blow out?

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Old 01-29-11, 01:17 PM
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FL What would cause the secondary injector bungs to blow out?
I had the sec injector bungs jb welded very well but my motor was able to blow them out at 18lbs of boost. What would be a cause of this issue? I am going to open the motor and redo the job...
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Old 01-29-11, 01:23 PM
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bungs? If you mean by that anything made of metal that was JB welded together, they blew out because you JB welded them in the first place.
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Old 01-29-11, 01:26 PM
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Heat, vibration, pressure. Do it right and you won't have this problem.
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Old 01-29-11, 01:45 PM
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yes, the motor will be opened and real plugs will be installed this time. Hopefully this thread will help someone in the future from making the same mistake.
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Old 01-30-11, 09:37 AM
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Where can I find aluminum plugs for the injector holes?
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Old 01-30-11, 10:08 AM
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I don't think that's what you need, unless they've been damaged or modified. There should be plastic diffusers in there, then rubber o-rings.
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Old 01-30-11, 10:27 AM
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I'm new here. What's an injector bung hole and where is it located?
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Old 01-30-11, 10:36 AM
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Sounds to me like he's referring to blocked-off injectors, plugging that there bunghole with a plug.
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Old 01-30-11, 11:07 AM
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You would need to weld something over the bungs or machine press some plugs in there. Why don't you just put injectors in there? Sounds like you have some kind of pointless oddball setup.
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Old 01-30-11, 11:23 AM
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Found it, thanks.

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