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Boost rated vacuum caps?

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Old 08-23-2024 | 06:32 PM
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Default Boost rated vacuum caps?
Rookie question, I know, the silicone caps I put on the 2 nipples off the throttle body didn’t last the first outing at 7psi. I could just stick some hose on the nipples and put bolts in them but looking for any other options
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Old 08-24-2024 | 06:30 AM
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i have had good luck with zip ties. i put two on the red cap in the picture, it hasnt come off at 19psi yet
same intake, other nipples i have tapped for 6-32 and glued a grub screw in.
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Old 08-24-2024 | 10:45 AM
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It’s not the issue of staying on, it’s the blowing the end out. I’ll try another with a ziptie instead of a hose clamp
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Old 08-24-2024 | 10:54 PM
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You could put RTV in the cap then shove it on to really plug it up. Then secure with a zip tie. I've done this before to make it a semi permanent plug.
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Old 08-26-2024 | 10:23 AM
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Originally Posted by 4EyedTurd1
It’s not the issue of staying on, it’s the blowing the end out. I’ll try another with a ziptie instead of a hose clamp
I think you're plugs are old and rotted.
I went and bought some AutoZone rubber vacuum caps and zip tied them on and never had an issue up to 16 lbs.
Know plenty of guys running twice that and never had an issue.
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Old 08-26-2024 | 11:47 AM
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Possible, I went and got silicone caps after reading somewhere about them holding up better.
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Old 08-26-2024 | 03:22 PM
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If you’re having trouble with soft caps, it only take a few minutes and a few dollars to get a tap that directly threads the ID of the nipple and some grub screws threaded in with sealant.
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Old 08-27-2024 | 01:03 AM
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It is also not that hard to plastic weld nylon. Could just permanently close up unused ports.
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