Roger B's latest activity

For the original pump I used 2mm silver steel (drill rod) for the piston, hardened and then lapped to 1.98mm with a simple split lap...

There are several people on here interested in miniature diesel fuel injection systems. One of the first requirements for this is a test...

These are the two pump designs. I think that the horizontal plunger version will have a better chance as gravity will help seat the...

There are two options for the fuel inlet in an injection pump, an inlet port in the cylinder or a ball/conical valve. The inlet port is...

This is my calculation for a 20cc engine. The density of air is around 1.2kg/m3 so 20 cc of air is around 0.024g. Taking a fuel air...

Some thoughts: Moving the plunger will alter the start of injection point. This could be compensated for by adjusting the timing of the...

I am happy to see someone else working on fuel injection systems and diesels, it’s a lonely world. This is my test pump. It is a...

There is quite a lot already in this thread however I have picked a few points from the OP to comment on: To get good diesel combustion...