1st Generation Specific (1979-1985) 1979-1985 Discussion including performance modifications and technical support sections

12A racing beat Weber intake brake booster question

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Old Aug 1, 2020 | 02:41 PM
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NikkiEnkei's Avatar
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From: Ann Arbor
12A racing beat Weber intake brake booster question

Hello, I was wondering what size fitting the racing beat manifold uses for the brake booster. It’s the threaded holes halfway down the manifold, one for the brake booster, and the other for the vacuum advance or something else. I’ve looked all over for NPT fittings that work, so if anybody could point me in the right direction that would be great
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Old Jan 21, 2025 | 10:11 AM
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From: Palm Coast, FL
Originally Posted by NikkiEnkei
Hello, I was wondering what size fitting the racing beat manifold uses for the brake booster. It’s the threaded holes halfway down the manifold, one for the brake booster, and the other for the vacuum advance or something else. I’ve looked all over for NPT fittings that work, so if anybody could point me in the right direction that would be great

Did you ever figure this out? Looking for the smaller fitting, also did you end up even using the vacuum advance/find any benefit from it, or did you skip out on it? Any pictures or ways to route the vacuum? Ive also seen people get nipple adapters for the webers vacuum take off ports.
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Old Jan 21, 2025 | 11:20 AM
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They would be NPT 3/8 or something like that. RB probably details that in the specs for the manifolds. Just read it here: https://www.racingbeat.com/RX7-1975-...nts/16482.html
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