This a 'Lighter&Lower evolution 2' type of cooling head. It is drilled and milled out to reduce the mass of the coolinghead which sits high up in the car and thereby lowering the Center of Gravity of the engine/car. The use of 6 screws instead of 4 ensures a better sealing between sleeve, botton head and the crankcase.
The sleeve has 7 transfer ports and an exhaust with booster ports. The special shape and positioning of the ports, covered by a patent, improve the internal fluid-dynamics to obtain the maximum possible performance.
The crankshaft has a special shape to reduce turbulences inside the crankcase. The front part was extended to improve the seal against fuel leaking. The balancing is done by three inserts made of tungsten alloy and the inlet has a silicone filling.
The shifted carburetor grants a better mixture flow inside through the crankase's intake. This gives the engine an improved fuel efficiency and a better power curve.
The R7 conrod is made from a superlight alluminium which has been checked ultrasonic. The specific form of the R7 creates little turbulence inside the engine while running.
The carburettor of this engine is made from plastic and in "reverse" style and has a sliding throttle valve. The new three tuning needles gives a better idle and improves the ability of the engine to return to low rpm after throttling.
Displacement: 3,49 cc
R.P.M. (max power): 37.200 RPM
Bore x stroke: 15,88x17,60 mm
Sleeve: 7 Transfer Ports and an Exhaust with Booster Ports
Rear ball bearings: steel
Front ball bearings: steel
Crankshaft: 14,5 mm - turbo
Carburetor: plastic - 9 mm - slide
Glowplug: Turbo (C6TGC) for 10 to 25 degree C
Exhaust position: rear
Weight: 373 g
Fuel type: 25% nitro
Novarossi Pipe and Header or Manifold:
Use Novarossi Tuned Pipes 51006M (EFRA 9901), 51016 (EFRA 9901) and 51020M
Use Novarossi Manifolds 41021, 41029 and 41030.