As a China factory specializing in the integration and supply of engine system components, Max Trading understands the crucial role of the intake manifold in engine performance. The Max Trading Lifan 110cc Intake Manifold employs a 26mm bore design, achieving a balanced optimization of "flow rate and velocity" from a hydrodynamic perspective.
At high RPMs, the time for the cylinder to complete intake is extremely short. The 26mm bore effectively reduces intake resistance and pumping losses, improving volumetric efficiency and allowing the cylinder to more fully draw in the air-fuel mixture. Simultaneously, this size is not blindly enlarged but controlled within a reasonable range, ensuring sufficient air velocity and tumble effect at low RPMs, resulting in more uniform fuel atomization and preventing fuel droplet buildup that could cause power lag.
Furthermore, the Lifan 110cc Intake Manifold optimizes the internal flow channel structure and smooths the inner wall to reduce turbulence and improve airflow stability. Combined with a reasonable pressure differential matching design, the negative pressure generated by the piston can more efficiently utilize atmospheric pressure to complete the intake process, thus helping the engine maintain stable response and power output across different RPM ranges.
In fluid dynamics, the relationship between pipe diameter and engine performance is a balancing act between volume and velocity.
Increased Volumetric Efficiency: At high RPMs, the engine has milliseconds to fill the cylinder. A 26mm bore reduces the restriction (pumping losses), allowing the cylinder to fill more completely.
The Velocity Factor: While bigger is often better for top-end power, going too large would drop the air velocity at low RPMs, making the engine feel sluggish. The 26mm size is designed to maintain enough "tumble" and speed in the air-fuel mixture to ensure it stays atomized rather than pooling into droplets.
Pressure Differentials: As you noted, the piston creates a vacuum (negative pressure). A well-matched manifold like this ensures that the pressure drop across the intake is minimized, so the "push" from the atmospheric pressure outside is as effective as possible.
| Feature | Impact on Performance |
| 26mm Bore | Higher airflow capacity for high-speed operation. |
| Smooth Internal Walls | Reduces turbulence, allowing for a more laminar flow. |
| Thermal Isolation | Most manifolds include a heat spacer to prevent fuel from boiling before it reaches the head. |
|
Lifan 110cc Intake Manifold |
Parameter |
|
Interface Diameter |
26mm |
|
Front Bolt Hole Distance |
47mm |
|
Distance Between Rear Bolt Holes |
44mm |
|
Length at Both Ends |
71mm |
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Yes, customization is allowed. But there's MOQ requirement for customized orders.
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