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May 19, 2014, 6:08 a.m.
5/19/2014
By Mike Garrison
LiveRC.com
Sonic Nitro Engines has released the latest version of their successful .21 engines. After extensive tests in cooperation with engine-guru Edoardo Picco, the Sonic X.21 engines feature the latest long stroke design offering more low and mid range power while keeping the fuel economy on a very good level.
Features:- 7 ports + 2 bypass hard chromed liner
- CNC machined domed piston
- Balanced 14mm turbo crankshaft with silicone insert
- Aerodynamic “knife edged” connecting rod
- Special backplate for improved fuel flow
- Turbo combustion chamber with cooling fins
- 14mm Swiss quality main bearing
- Lightweight cooling head for low center of gravity
- Composite slide carburetor
- 8.0mm and 9.0mm aluminium venturi inserts
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