Originally Posted by
FLHX1550
No harder to scale down than a 5 valve cylinder head with titanium valves.
Direct Cylinder Injection was introduced into sleds over 10 years ago with Arctic Cat on the 98 ZR580 platform.
The current Rotax version places the injector directly on top of the head, that's why they are so clean. They dont inject any fuel underneat the piston at all. All that is moving in the crankcase is air and 2 small oil injectors that lube the lower rod bearing. People are reporting over 2500 miles on one gallon of oil. IMO, the technology could easily be transferred over to a R/C engine with ease. But as a manufacturer, why would you bother? They sell so many of these engines (with about a 300% profit), why re-tool and do something different?
Where are you going to add the electric fuel pump needed to make the 3000PSI Injectors DI uses? Where are you going to add the oil tank and pump?