Novarossi has presented the new Mephisto 21 GT5 5 ports extra long stroke 1/8th GT nitro engine. This Engine uses a new R4/18 conrod, redesigned and made with a special aluminum alloy that allows it to have a high resistance while maintaining the lightness and performance of the previous R4/17.

The sleeve has 5 transfer ports and an exhaust with booster ports. The special shape and positioning of the ports improve the internal fluid-dynamics to obtain the maximum possible performance.

The crankshaft is grinded to increase the mixture flow and has a special shape to reduce turbulences inside the crankcase. The balancing is done by three inserts made of tungsten alloy and the inlet has a silicon filling to reduce the weight of the crankshaft to improve acceleration. The durability has been significantly improved with the DLC coating.

The rear ball bearing has high quality ceramic balls to minimize wear and inertia to improve acceleration and fuel consumption. The new three tuning needles gives a better idle and improves the ability of the engine to return to low rpm after throttling.

New head, redesigned to improve the flow of air and thus increase cooling and ensuring an optimal center of gravity.

Novarossi MEPHISTO 21 GT5

• Displacement: 3,49 cc
• R.P.M. (max power): 41.300 RPM
• Bore x stroke: 15,88×17,60 mm
• Sleeve: 5 ports
• Rear ball bearings: ceramic
• Front ball bearings: steel
• Crankshaft: 14,5 mm – turbo – tuned – DLC
• Carburetor: plastic 9mm – reverse 3 adj.
• Glowplug: Turbo (CT8)
• Exhaust position: rear
• Starting: standard
• Weight: 365 g
• Fuel type: 16% nitro