Losi Nitrotec R21 Race Engine
Developed with the racer in mind, the Italian-made Nitrotec
3.5cc/.21C.I Race Engine was designed to produce a race winning power band and
throttle response while delivering exceptional run time. The Nitrotec R21 is
recommended for use with the 8IGHT family of vehicles, as well as any nitro
vehicle that requires a .21 engine.
Engine Call-Outs
-
State of the art ABC (Aluminum piston-Brass sleeve-with Chrome plating)
construction
-
Optimized hi-velocity extra efficient 4-port sleeve design
-
Lightened aluminum and silicone alloy piston with a dome/dish design for improved combustion
-
Lightened & knife-edged machined aluminum connecting rod with pressurized oiling feature
-
Vacuum cast aluminum alloy case with large cooling and reinforcement fins
-
Stuffer type back plate with o-ring seal and machined piston relief
-
Oversized cooling heat sink head
-
Turbo head insert/combustion chamber
-
Hardened steel turbo ported crankshaft with machined reliefs to prevent windage
-
Specially constructed precision ball bearings supporting the crankshaft
-
Composite double 0-ringed slide type carburetor with molded restrictors
-
Easy tune high and low speed needle valves
Engine Specs
Displacement: .21 cu inches (3.5 cc)
Bore: .6402 inches (16.26mm)
Stroke: .6614 inches (16.8mm)
Practical RPM: 5,000-35,000
Weight (w/o Muffler): 13.5oz (383 g)
