XTR RACING have introduced the new AR3 TUNED nitro engine designed for 1/8 scale of road RC models. AR3 engine is based on the last European Champion engine but incorporates numerous improvements and refinements with focus on maximum bottom and top-end power. The 3-port engine is designed and manufactured in Slovakia (Europe) and includes a ceramic bearing and diamond-coated crankshaft.
The crankshaft is individually balanced with a tungsten weight and filled with silicone. The sleeve and piston set were specially selected and matched. The engine features 10-rib engine head.
Main features of the XTR Racing AR3 Tuned Engine:
– 3-port, high-competition 1/8 off-road engine
– Maximum bottom and top-end power
– Specially selected and matched sleeve & piston set
– Ceramic ball bearings
– Displacement: 3.5cc
– Bore: 16.40mm
– Stroke: 16.40mm
– Weight: 349g
– Max. power: 2.6 HP @ 34,000 RPM
– Practical range: 4,000-42,000 RPM
– Ports: 3 transfer ports
– Piston: CNC-machined silicium
– Sleeve: CNC-machined brass, hard chrome plated
– Front ball-bearing: 7x19mm, made in Japan
– Rear ball-bearing: 14×25.8mm ceramic, made in Germany
– Crankshaft: 14mm
– Carburettor: Alloy body with thermal isolation; 3-needle with modular venturi
– Exhaust position: Rear
Source: xtr-rc.com