Building a Vacuum Reservoir for a Honda Pacific Coast Fuel Injection Conversion Project


20141207_152006

This humble pipe will be the vacuum reservoir on my Honda Pacific Coast PC800 fuel injection conversion project.  I have been working for some time on converting this carburetted bike to fuel injection.  One issue has been a fluttering manifold air pressure reading from the Manifold Air Pressure (MAP) sensor when it is hooked directly to the intake runners.  The solution is to have a vacuum chamber to smooth out the pulses from the opening and closing of the engine valves.  The pressure readings will still be correct but without the huge flutter problems.

20141207_151955I JB Welded in brass fittings to the two screw ends of the PCV pipes.  Once everything is dry, I will bolt it all onto the bike under the plastic.