Pistons,
Classic gasoline = Aluminum
Diesel = 1) Aluminum with steel ring lands
2) Steel
My engine is a slow turner ~2500-3000rpm so I am tempted to machine new steel pistons instead of trying to deal with steel inserts for alum. pistons.
Question#1 Opinions?
Also, most if not all OEM diesel designs have the fuel injector located in the center of the cyliner bore (please correct me if I'm wrong on that). From the information I've gathered so far about the R/R conversion, they replaced the 2 spark plugs with 1 glow plug and 1 fuel injector. That puts the injector over on the side of the chamber. Whey I machine the valley into the new pistons I'll try to design a heart shape or something to get the fuel down into the bowl during the initial bang. However, once the piston begins to travel down the bore, I'll have the fuel injecting from the side of the head and therefore one side of the chamber walls would probably get hotter than the other side.
Question #2: Does anyone have any ideas on how to protect that side of the cylinder bore? coatings/ coolant rate/ could I direct the fuel jet off axis from the injector, more toward the C.L. of the bore/ etc.?
Question #3: The classic Diesel thermodynamic cycle had a constant pressure combustion stage, where the fuel was injected/ignited at the same speed as the piston descended, offsetting the increasing volume of the chamber. The "hybrid-diesel" allows for some initial increase in pressure, by beginning the comustion before the piston reaches TDC. Was this for smog or fuel efficiency or power or computer processing or what? How prevailant is it with today's diesels and how effective is it? What pressure does the chamber get up to? I can't seem to google the answer to that real well.
Thanks
Classic gasoline = Aluminum
Diesel = 1) Aluminum with steel ring lands
2) Steel
My engine is a slow turner ~2500-3000rpm so I am tempted to machine new steel pistons instead of trying to deal with steel inserts for alum. pistons.
Question#1 Opinions?
Also, most if not all OEM diesel designs have the fuel injector located in the center of the cyliner bore (please correct me if I'm wrong on that). From the information I've gathered so far about the R/R conversion, they replaced the 2 spark plugs with 1 glow plug and 1 fuel injector. That puts the injector over on the side of the chamber. Whey I machine the valley into the new pistons I'll try to design a heart shape or something to get the fuel down into the bowl during the initial bang. However, once the piston begins to travel down the bore, I'll have the fuel injecting from the side of the head and therefore one side of the chamber walls would probably get hotter than the other side.
Question #2: Does anyone have any ideas on how to protect that side of the cylinder bore? coatings/ coolant rate/ could I direct the fuel jet off axis from the injector, more toward the C.L. of the bore/ etc.?
Question #3: The classic Diesel thermodynamic cycle had a constant pressure combustion stage, where the fuel was injected/ignited at the same speed as the piston descended, offsetting the increasing volume of the chamber. The "hybrid-diesel" allows for some initial increase in pressure, by beginning the comustion before the piston reaches TDC. Was this for smog or fuel efficiency or power or computer processing or what? How prevailant is it with today's diesels and how effective is it? What pressure does the chamber get up to? I can't seem to google the answer to that real well.
Thanks