May 31, 2018

Novarossi Mephisto .21 nitro on-road engine

Novarossi have introduced their all-new Mephisto .21 nitro on-road competition engine. The power plant utilises the new R4/18 conrod that was redesigned and is made from a special aluminium alloy for improved durability while retaining the low weight of the previous R4/17. Also new is the DLC-coated crankshaft with triple tungsten balance weights and silicone insert. The updated design optimises internal mixture flow while the lightweight shaft improves agility. The sleeve is of a 9-ports design with exhaust booster ports and the special shape ensures maximised performance while the compact 3-needle carburettor allows for better idling and quicker returning to low RPM after throttling. The engine’s features are rounded out by a new combustion camber insert specially developed for the use with 16 percent nitro fuel – a 25 percent insert is available separately – and they are topped off by a new 2-tone cooling head that provides optimised thermal efficiency and a low centre of gravity. The engine is available with all-steel or hybrid front steel, rear ceramic bearing.

– Displacement: 3.49cc
– R.P.M. (max power): 41,800RPM
– Bore x stroke: 15.88×17.60mm
– Sleeve: 9 ports
– Rear ball bearing: Steel or ceramic
– Front ball bearing: Steel
– Crankshaft: 14.5mm -Turbo – tuned – DLC
– Carburettor: Aluminium – 9mm – slide 3-needle
– Glow plug: Turbo (CT8)
– Exhaust position: Rear
– Starting: Standard
– Weight: 341g
– Fuel type: 16% nitro

Source: Novarossi []


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