Reply to "Bad brakes"

I would think that most IR setups will use Hall Pantera Weber intake manifolds? They don't lend themselves well to plumbing vacuum or nitrous under the manifold.

The 48ida's don't have vacuum ports, TWM 48ida throttle bodies do. I don't know about others like Clasic, which may.

Actually there is no rule that says a Pantera has to have power assisted brakes. I doubt the race cars do.

Plumbing all runners together for vacuum or even nitrous is not an esthetic delite. There are not going to be a lot of possible variations.

You could use 48ida carb spacers and put the plumbing nipple in them. That would save butchering up the manifold itself.

If that is too high of an assembly, you could mill down the mounting flange for the carbs on the manifold.

The Hall manifold is very thick there. The DT manifold wasn't and had the tendency to warp as a result.

As far as what size tubing to use for the plumbing to work, I don't know that.

With the Webers if you go too large it will affect interaction of the carbs since at some point you start to create a single plenum manifold and depending on the overlap of the cam, you are presurizing the tubing.

The Webers actually make enough vacuum for the brakes to take vacuum off of one cylinder. That's the way Halls manifold was sold new originally, with a vacuum port off of #8.