There are several good reasons to trade your original-equipment air intake for a cold-air intake. But there are drawbacks, too. Here's the breakdown.

Suzuki DR-Z “Take it to the Streets” events at dealers include demo rides on the highly anticipated 2025 DR-Z4SM before it ...

Small, ultra-fast, primary and “afterburner” secondary combustion events promise to deliver brake thermal efficiency as high ...

T hough it's been called many things, the VTEC acronym stands for Variable Valve Timing and Lift Electronic Control. VVTLEC doesn't quite roll off the lips, but the adjectives one ...

The engine’s intake valves could break while driving, and lead to engine failure. They were all from the 2021 to 2022 model years. Dealers will do an engine cycle test and replace the engine if ...

The half-time shaft, powered by a belt from the crankshaft, slid and twisted the sleeve valves to align with the cylinder's intake and exhaust ports in-time with the four-stroke process.

There is also no need for a minimum of two valves (intake and exhaust) per cylinder as seen in a piston engine. Instead, fuel enters via intake ports that don't need to open and close. In a Wankel ...

Last month's "How It Works" story gave you the basics of the four-stroke cycle, describing the motion of the intake and exhaust valves in relation to the piston moving up and down in the cylinder.

As a vehicle's engine operates, the intake and exhaust valves open and close rapidly while the pistons move up and down in the cylinder. These mechanical actions require a constant supply of hot oil ...

A duo of valves, the intake and exhaust valves, control the passage of the air-fuel mixture and the expulsion of exhaust gases. The intake valve orchestrates the entry of the mixture during the intake ...

If you have a bit of valve overlap—when the exhaust valve opens and the intake valve closes—you can use that exhaust pulse to help pull more air into the cylinder. "That negative pressure wave ...

A cylinder head with three intake and two exhaust valves could bring benefits in volumetric efficiency—how much air and fuel an engine takes in on an intake stroke—compared with a traditional ...