GotNitro RC Discount Store

Take advantage of the recent drop in the Euro. Brand new 2010 Radical/OPS factory modified engines. This Radical/OPS 621P is the newest, hottest Off-Road .21 engine's high speed engine available today. This is the most powerful engine OPS produces. Allot of guys are now running this engine in their buggys for the larger long straightaway tracks. Chrome-platted brass design sleeve, total of 7 transfer and boost ports. Note the differance in picture of boost ports in front of sleeve. Italian made and boasts the finest materials and under goes the highest in production quality control. It has true ABC construction. Ask any racer running the 621P and they will tell you it is the finest, fastest .21 engine on the market today. Comes with 3 Venturi carburetor with 6,7,8mm aluminum inserts. Engines modified and manufactured by OPS in Italy. Engine comes with OPS 24ct GOLD Turbo plug. Engine Characteristics: Super Top end power with tremendous Mid-High. Here are some specs: Displacement: 3.5cc (.21 ci ) Horse Power: rated 3.07 hp RPM: 40,000 This Italian stallion is a true work horse in the realm of off-road 1/8th scale competition motors. You will be amazed by the fine detail of this engine. The engines mount screw holes are machined flush which is a feature I have never seen before. Beautiful Red cooling head has a bull printed on the top of the head is a classy Italian touch. The heat-sink head is secured to the engine block by six cap-head screws. The button cylinder head design allows the racer to fine tune the engine to their glow plug preference by offering an optional standard button head piece part # RAD6739760. We now stock these head buttons. Engine comes with all the necessary items to get this motor up and running, a turbo OPS glow plug and Allen wrench. The engine's are shimmed for 25-30% nitro fuel. The crankshaft has a ported center passage with elliptical cuts on the counter-weights along with oil passages where the crank meets the case bearing to help lube the components. The end of the crankshaft has a beveled edge that helps chop up the mixture as it enters the crank port. Admiring the chrome-platted brass design with a total of 7 transfer and boost ports. All the transfer ports have tapered angled channels with fanged out edges. The exhaust port has an internal taper to the port with some notches at the top. The engine receives extremely high marks in this department as it is evident that the power version and the torque version engines are factory modified throughout the products port system. The blocks internal ports provide a smooth flow and transfer throughout the engine block. This engine block is painted hard coat black with five integrated fins to help displace the core temp away from the piston and sleeve. Careful when reinstalling the back-plate, the instructions are clear that the piston must be positioned up in the sleeve before the backplate is reinserted as the o-ring sealed plate is milled out to accommodate a portion of the high-silicone aluminum piston when it is at dead bottom. This power version slide carburetor has one low-speed, and one high- speed needle along with one idle screw. Enthusiasts often make the mistake of breaking in the engine cold you do not want to do that with these engines. Heat em up to 200% before starting each time and every time and these engines will last you a life time. We have customers in Australia that swear their Radical 621's are coming on stronger after 5-6 gals of fuel. You will get many gallons of unbelievable performance out of these engines with a little TLC. Any question just shoot us an email. We carry full line of replacement parts and all Radical orders are shipped Priority mail Free of charge.