Fiberglass - under pressure?

[duplox]

I've recently given fiberglassing a shot, I like it. Its easier to make more complex shapes than with metal. I'm curious as to if I could make part of my intake manifold out of fiberglass and not have it explode/collapse under pressure or vacuum. My plan would be to make a frame for it out of heavy metal screen, lay a few layers of glass over the top of it, flip it over, and glass on the inside as well, so the metal screen is embedded in the fiberglass. I would probably incorporate a few metal pieces to strengthen certain parts of it(near the throttle body for example).
Would this work, or am I wasting my time?

[TheSilentChamber]

If you get the wetout right and use the right weight fiberglass it should hold up. For an application such as that I would use an epoxy resin as it is stronger and has a higher max operating temp. Your also going to have to determine if its going to be able to withstand the heat that it is going to be subject to. If your intested I'll post up a tensil strenth chart of fiberglass and other composites so you can compair it to its metal counterpart.