Vacuum port SBC
07-28-2017, 04:06 PM
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Vacuum port SBC Hi, I have a brake booster already setup to attach to the large manifold port to the rear of the carb. Eldebrock carb.
In the back of the carb (on the actual carb) there is a port for the brake booster. I'm going to hook up the trans modulator to that instead.
essentially flipping the typical configuration.
Seems like a 1:1 switch? Or am I missing something
In the back of the carb (on the actual carb) there is a port for the brake booster. I'm going to hook up the trans modulator to that instead.
essentially flipping the typical configuration.
Seems like a 1:1 switch? Or am I missing something
Last edited by gaboriar; 07-28-2017 at 04:07 PM. Reason: more precise
07-29-2017, 02:52 AM
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Both the brake booster and the modulator need manifold (full) vacuum to operate properly and consistently. Make sure both are hooked to sources below the throttle plates, as mentioned above. I've only owned one Edelbrock carb (I'm a Holley person), I think it was a 1405, and that was many years ago so I'm not sure which ports on those are typically manifold vs. which are timed/ported.