Boost rated vacuum caps?

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Aug 23, 2024 | 06:32 PM

4EyedTurd1

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From: Waco,Tx

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

Aug 24, 2024 | 06:30 AM

TrendSetter

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From: Florida

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.

Aug 24, 2024 | 10:45 AM

4EyedTurd1

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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

Aug 24, 2024 | 10:54 PM

ScottStaypuff

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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.

Aug 26, 2024 | 10:23 AM

Black_Sunshine_99

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Quote:

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.

Aug 26, 2024 | 11:47 AM

4EyedTurd1

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Possible, I went and got silicone caps after reading somewhere about them holding up better.

Aug 26, 2024 | 03:22 PM

TrendSetter

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From: Florida

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.