The Nitrotec R21 is the perfect solution for any racer who is looking for an economically priced engine that offers great power response, similar quality, construction, features and performance of higher priced nitro engines. With the racer in mind, the Italian-made Nitrotec R21 was developed to produce a race winning power band and throttle response while delivering exceptional run time. The Nitrotec R21 is recommended as the perfect completion engine for any of the 8IGHT family of vehicles as well as any nitro vehicle that requires a .21 engine to complete.
State of the art ABC (Aluminum piston-Brass sleeve-with Chrome plating) construction
Optimised hi-velocity extra efficient 4 port sleeve design
Aluminium/Silicone domed piston with machined lightening and sub-porting
Knife edged hi-tinsel aluminium connecting rod with oiling feature
Vacuum cast aluminum alloy case with large cooling/reinforcement fins
Stuffer type backplate with o-ring seal and machined piston relief
Oversized cooling heatsink 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 9mm carburetor
Easy tune high and low speed needle valves
Includes 7, 6.5, & 6mm o-ringed carburetor restrictors
Carburetor materials optimized to prevent thermal conduction
Displacement: .21 cu in (3.5 cc)
Bore: .6402 in (16.26mm)
Stroke: .6614 in (16.8mm)
Practical rpm: 5,000-35,000
Weight (without muffler): 13.5oz (383 g)
Includes: Glow Plug, 7, 6.5, & 6mm carburetor restrictors
Requires: Glow fuel, tuned pipe and manifold
