I've been thinking alot about the cetane booster. It makes the fuel quicker to light off but does it change the auto ignition temprature? They are different things I think. I thougt maybe there is an advantage to a delayed ignition. If we had delayed ignition we could run a higher compression ratio and still not get knocking and have more reliable ignition.

The thing is it really seems like the cetane booster helps the engine run.

On the straight pump diesel what I think I'm having problems with is that it needs heat to vaporize. No vaporization = dead stick. Of course Kerosene would probably help. Also I would just love to figure out a way to keep the engines temprature more stable. If I could figure out a way to keep the crankcase warmer that would help with fuel vaporization. Warming the fuel on the way to the engine with a few wraps of copper tube around the mufler could help but it still might get cold when the plane is idling. Just might have to try that though. Heating the intake air off of the mufler might work too......