HOWIN L4-172 17.2cc SOHC Inline 4 Cylinder Nitro RC Engine Model 15000rpm
Hero Section: Unleash the Beast at 15,000 RPM
There is a distinct difference between a model and a machine. The HOWIN L4-172 crosses that line with a scream. Imagine the adrenaline rush of a real racing engine, shrunk down to the palm of your hand, revving all the way to 15,000 RPM. This isn't just a static display; it is a "little violent beast" waiting to breathe life into your 1/8 or 1/10 scale RC car or boat. Whether you are a speed freak looking for the ultimate power plant or a collector seeking the mechanical purity of an inline-four, the L4-172 delivers a visceral experience of sound, smell, and speed.
Why Choose the HOWIN L4-172?
- High-RPM Adrenaline: Most scale engines putter along; this one screams. With a redline of 15,000 RPM, it produces a high-pitched, race-inspired exhaust note that is music to any gearhead's ears.
- Retro-Modern Aesthetic: Finished in a sleek silver and black color scheme, the engine combines the classic look of early automotive history with modern CNC precision. It looks as aggressive as it sounds.
- SOHC Precision: Featuring a Single Overhead Camshaft (SOHC) design with alloy rocker arms, it mimics the valve train geometry of full-sized performance cars. Watching the valves operate is a lesson in mechanical harmony.
- The Ultimate Upgrade: This engine is designed to be the heart of a project. It transforms a standard RC chassis into a high-end mechanical marvel, creating a perfect bonding project for fathers and sons to build and tune together.
Technical Highlights: Engineering Excellence
- Wet Liner Water Cooling: To handle the heat of 15,000 RPM, the engine uses a "wet cylinder liner" design. The coolant directly contacts the outer wall of the cylinder liner (driven by an external pump), providing superior heat dissipation compared to air-cooled or dry-liner systems.
- Reinforced Crankshaft: High speed requires high strength. The integrated crankshaft features a five-point support system, ensuring it remains rigid and deformation-free even under the most intense throttle loads.
- Durable Internals: The piston rings are made from nodular cast iron, and the block is CNC-machined aluminum alloy with anodic oxidation. This combination ensures wear resistance and a long service life.
- Easy Tuning: Equipped with a single carburetor and adjustable valves, the L4-172 is designed to be user-friendly. You get the complexity of a multi-cylinder engine with the tuning simplicity of a single-carb setup.
Specifications
- Brand: HOWIN ENGINE
- Model: L4-172
- Type: Nitro Internal Combustion Engine
- Configuration: Inline 4-Cylinder, 4-Stroke
- Valve Mechanism: SOHC (Single Overhead Camshaft)
- Displacement: 17.2cc (4 x 4.3cc)
- Bore: 18.00mm
- Stroke: 17.00mm
- RPM Range: 3000 - 15000 rpm
- Power Output: 2.4ps @ 13000 rpm
- Cooling: Water-Cooled (Wet Liner)
- Fuel: 20-25% Nitro Fuel
- Lubrication: Splash Lubrication (Grease required for cams)
- Starting: Electric (480 Brush Motor included)
- Dimensions: 15.2 x 10.1 x 10.6cm
- Weight: 1200g
Usage Scenario: The Garage Symphony
It’s Sunday morning. You have the L4-172 mounted on your test bench or RC chassis. You connect the 3S LiPo battery to the starter. With a whine of the electric motor, the engine catches. It settles into a smooth, rhythmic idle—purr, purr, purr. Then, you blip the throttle. The sound instantly transforms into a fierce growl, echoing the spirit of 1960s racing legends. It’s not just a hobby; it’s a sensory experience that connects you to the soul of mechanics.
Important Tips from the Workshop
- Fuel Requirement: This engine is tuned for 20-25% Nitro fuel. Do not use standard gasoline unless you purchase the separate gasoline modification kit.
- Lubrication is Key: While the crankcase uses splash lubrication from the fuel, the overhead camshaft does not. You must regularly apply grease to the cam and rocker arms to prevent wear.
- What You Need: The package includes the engine, glow plugs, and ignition. To run it, you will need to provide: a fuel tank, fuel lines, a water cooling kit (radiator/pump/tank), and a 12V/3S LiPo battery for the starter.
- Break-in: High-RPM engines require patience. Run the first few tanks rich and at moderate speeds to ensure the cast iron rings seat perfectly.
Customer Support
We are fellow enthusiasts who understand the intricacies of multi-cylinder engines. If you need help with tuning, installation, or parts, please contact our support team at service@helloworld7.com.
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