thanks dude. I am checking it right now.Hi breadf !
Hi All ! Yesterday, I watched some mini diesel engine on youtube, they are great. a fleeting thought, it could be the next project when i finish V4 (my V4 is not done yet) I have a few questions: With mini diesel engine , compression ratio so it can run ? How much should the oil pressure be...www.homemodelenginemachinist.com
injectors, pumps, valves are the hard parts
But you can do it, just have to be very patient
Hi MachineTom,Compression ratio between 16:1 and 20:1. Injector pressure on old type injector is a pop off around 2500psi. this is the type with an inline injection pump, steel lines to each injector. THe running pressures of these designs is around 10000 psi. Steel lines of 1/4 od and an ID of .020". This would be called direct injection engine , piston would have a round depression as a combustion chamber. Injection nozzl;es would have small holes .0015-.+ into combustion chamber. The pre-chamber engines like used in cars is different, the nozzle is a Pintel. sort of like a nozzle on a garden hose, the fuel comes out like a cone. Into a chamber in the head, which then travels into the area ontop the piston.
This is all OLD TECH 20 years small truck type engines. If you could find a small twin cylinder engine used in truck trailer refrigeration, It would be difficult to down size the parts, but you best chance to build a mini diesel.