find for autometer users

[thermal]

Bellows is really just a minute effect to the physics of this. Bernouli's principle is simple. Take a garden hose for instance. Turn the water on. Place your finger on the tip of it. As the area gets smaller, velocity increases. Velocity is really nothing but speed rate of the medium.

Substitute:
Garden Hose= Intake manifold
Tubing= is where your finger is at on the tip of the hose

Apply this process on the basics of engine dynamics. The intake manifold obviously posseses greater area than the tubing. As the air travels (with the IM under the pressure state), it will travel to a smaller area of constriction faster than it will on a larger area, on this case, larger tubing. However, there are still some factors to consider on this smaller area to improve velocity. Here are some:
1) Distance of travel (Length of tubing)
2) Frictional affect (How rough the passages).
3) Directional (Bends of the tubing). Smooth bends are ideal. Avoid sudden turns.

To elaborate on the bellows:
Inside almost any pressure or vacuum gauges is a hollowcoil made of a typical bellows material for sensitivity and some strength. The needle is positioned in the middle of the coil. As pressure is applied to the coil, the reaction is for the coil (bellows) to expand. The needle then moves to the + side. Vice happens under the vacuum state.

But really, these are all getting way too deep for the subject. My final thought on this subject is to simply shortened the length of the tube, whether a bigger tube or not.... and avoid leaks of course.