ROMA.25


   Displacement: 4,04 cc
   R.P.M. (max power): 37.500 RPM
   Practical range: 6.000-42.100 R.P.M.
   Bore x stroke: 17,10x17,60 mm
   Sleeve: 7 ports
   Rear ball bearings: steel
   Front ball bearings: steel
   Crankshaft: 14 mm - turbo
   Carburetor: plastic - 9 mm - reverse
   Glowplug: Turbo (C6TGC)
   Exhaust position: posteriore
   Starting: -
   Weight: 374 g
   Fuel type: 25% nitro
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instruction-manual

 


FEATURES

02000-25   08500-25   15000-25   21000-2
Cooling head:
The cooling heads of the ROMA.21 engines are made lighter by making aditional holes in the cooling fins. This reduces the overall mass of the engine.
  Sleeve:
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.
  Crankshaft:
The Turbo SG crankshaft is made from high quality steel.
  Gasket:
The inner shape of the gasket has a new shape, and with that more material. Together with a change in material these gaskets are more resistant to high temperatures.
             
candela-turbo   13021   03902   24063
Glowplug:
The glowplug of engine is a Turbo type glowplug. Turbo glowplugs have a different shape than Standard glowplugs and therefor are not interchange able with engines that are using Standard glowplugs!
  Rear cover:
The rear cover presents a round shape to optimize the filling and reducing the dead spaces. the steel plate is to reduce friction and to expand the lifespan of the conrod.
  Compression rings:
The ignition timing is controlled with these little rings of various thickness. To change the ignition timing you can add or remove a ring of a certain thickness.
  Carburetor:
This carburettor is made from plastic and have a sliding throttle valve. (reverse type).

 

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300213435036000 cand-cons-1a8off
 
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