Vacuum manifold block placement
Thread Starter
Teching In
Joined: Feb 2026
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Vacuum manifold block placement Posted this in the corvette forum but maybe I’ll get more responses here,
I’m currently in the process of changing some things in my c6 that include installing a holley low ram and an ecs 2200x blower. The intake has 3 ports on the back for the IAT, brake booster and map sensor. I need to use a port for the catch can and also a source for all the other things that need vacuum signal like the 2 bov’s, fuel regulator and hobbs switch for the pumps which will be coming from a vacuum manifold. There’s three possible ways I can think of,
1. Tap the map port to connect the catch can by itself. And T off the brake booster line for the vacuum manifold for all the other things including the map sensor via remote mount. Can the brake booster line hold that much things coming off of it? Or would it affect the vacuum going to the brake booster and decrease its effectiveness?
2. Tap the map port for a dedicated line for the vacuum manifold. Put a T on the intake manifold for the brake booster and the catch can. Im not sure if the catch can can be connected to the same spot as the brake booster or if the catch can needs its own port by itself.
3. Tap the map port for the catch can, leave the brake booster alone, and drill and tap a new hole for the vacuum manifold alone. This being the ideal option but not sure if drilling another hole would be possible.
Anyone have any advice?
I’m currently in the process of changing some things in my c6 that include installing a holley low ram and an ecs 2200x blower. The intake has 3 ports on the back for the IAT, brake booster and map sensor. I need to use a port for the catch can and also a source for all the other things that need vacuum signal like the 2 bov’s, fuel regulator and hobbs switch for the pumps which will be coming from a vacuum manifold. There’s three possible ways I can think of,
1. Tap the map port to connect the catch can by itself. And T off the brake booster line for the vacuum manifold for all the other things including the map sensor via remote mount. Can the brake booster line hold that much things coming off of it? Or would it affect the vacuum going to the brake booster and decrease its effectiveness?
2. Tap the map port for a dedicated line for the vacuum manifold. Put a T on the intake manifold for the brake booster and the catch can. Im not sure if the catch can can be connected to the same spot as the brake booster or if the catch can needs its own port by itself.
3. Tap the map port for the catch can, leave the brake booster alone, and drill and tap a new hole for the vacuum manifold alone. This being the ideal option but not sure if drilling another hole would be possible.
Anyone have any advice?
TECH Enthusiast
Joined: Feb 2020
Posts: 734
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My thinking says you'll be fine with everything teed into the brake booster line except the catch can / pcv system. It acts like a vacuum leak and could reduce the vacuum that reaches the booster . Other things are all dead ends - no continuous flow
Exactly, I almost started in on wastegates and whatnot and remembered this was a supercharger application and all that crap doesn't apply lol.
Thread Starter
Teching In
Joined: Feb 2026
Posts: 6
Likes: 0
I’ll T off the brake booster for all other things and put the catch can by itself on the map sensor port. That’s what I was leaning towards but wasn’t sure if having too many things would affect the brake booster. Thanks for the replies
