ATOM SV-1 Long Stroke 21 Race Engine
The Atom SV-1 is a complete new ground up design long stroke engine. Great care has been taken to maximizing power, fuel efficiency and reliability. We believe that only the highest attention to detail can deliver a truly great engine.
The new crank case features transfer ports that maximize gas flow to deliver amazing power. Whilst at the same time being incredibly strong and light weight. The back plate is hard coated to minimize friction and wear between it and the conrod.
The new Crank shaft features a silicone filled inlet port to aid high speed gas flow through the central transfer tunnel, maximizing both power and efficiency. The high grade steel shaft is heat treated to ensure the best possible service life.
The all new carburetor features an allow body for strength and stability. A thermal barrier collar prevents heat transfer from the crank case to help ensure a stable race tune. Interchangeable restrictors allow the performance of the engine to be tailored to suit track conditions and layouts (6.5 & 7mm included)
The new cylinder head is super strong yet light weight and features a low center of gravity.
Atom SV-1R 3-Port long Stroke .21 Nitro Engine
*New for 2019 - the "R Spec". Redesigned piston/sleeve/crank with special coating for longer wear
Atom SV-1R highest torque 3.5 cc off-road engine
Category : 1/8 Buggy or Truggy
Displacement : 3.5cc
Bore [mm] : 16.26
Stroke [mm] : 16.8
Inlet ports : 3
Outlet ports : 1
Front ball bearing dimension DixDexS [mm] : 7x19x6
Rear ball bearing dimension DixDexS [mm] : 14x25.4x6
Carburetor diameter reducers [mm] : 6.5/7
Weight [g] :329
Cylinder system : ABC
Exhaust type : rear
Recommended Glow plug : P3 or P4 Turbo type
Recommended pipe : ATOM 2106, Novarossi 9901, OS 2090, 6MIK 2058, or Nova 2096
Recommended fuel : 25-30% nitro
*Compare to O.S. 21XZ-B Spec II 12183 12175