Angier -

I would not dare run fuel and oil hoses on the hot side of the firewall without firesleeve.  The purpose is to prevent burning through the hose and dumping even more flammable stuff onto the fire.  Inside the cabin, non-firesleeved stuff is fine.  By the time the fire burns through those lines, I won't care anymore.

Don't forget to have a restrictor fitting on the line going to the oil pressure sensor, so a sensor failure or loose connection doesn't pump out all your oil.  Van's sells them at a reasonable price.

As far as manifold pressure, that's another story and I, too, look forward to the answers.  On th ehot side of the firewall I was planning on using firesleeved hoses from the same material as my fuel lines just on general principles, but on the cold side of the firewall I plan to use the yellow tygon (or whatever that stuff is).  I need manifold pressure going to the Light Speed Ignition system CPU which is in the cockpit.  My manifold pressure sensor is mounted to the firewall on the cold side, with a hole in the firewall so that the hose from the engine screws directly into the sensor snubber.

- Rob Wolf