DOHC designs also allow using four valves per cylinder instead of two, which improves air flow and increases power and efficiency. A downside of DOHC engines is that they have more parts and are ...

An engine misfire is when one or more cylinders doesn’t produce power, and there are several possible causes, from a fouled spark plug to a clogged fuel injector or faulty oxygen sensor.

Pontiac, perhaps inspired by Ford's Tunnel Port cylinder head design, rearranged the valve layout in the Ram Air V heads, swapping the two inboard cylinders to put the intake valves, not exhaust ...

The noncontact structure of the cylinder also eliminates dust generation for reduced wear. Fujikura offers a wide range of cylinder sizes. Standard cylinder diameters range from 0.39 – 3.93 in.

There are two valves at the top of the cylinder; an inlet valve and an outlet valve. The inlet valve is where the fuel and air enter the cylinder from the carburettor or electric fuel injector, and ...

Pontiac experimented with a rotary air cooled 4 cylinder engine in a 2 seat car. They had one prototype. The engine was behind the seats and it used a modified A body platform. Not sure of the valve ...

In the early 1900s, the sliding sleeve valve engine had some advantages over tappet valve engines of the time. For example, sliding sleeve valve designs allowed larger intake and exhaust ports, a ...

Recently, a GA pilot at Newnan-Coweta County Airport (KCCO) in Georgia pulled a Cessna 172 out of the hangar, ran through a quick preflight inspection, and yelled, “clear prop!” ...

UND has gone back to 100LL from UL94 after citing an issue with "exhaust valve recession" in the Lycoming engines that power its fleet. Meg Godlewski · Friday, November 10, 2023 ...

The record-breaking quad-valve 659cc unit has no conventional valve springs but still manages to crank out 77.5 horsepower at 9,750 rpm with a standard exhaust. That figure then goes up to 85 hp ...

Classic air-cooled Porsche 911 sports cars like the 964 and 993 can now upgrade to ultra high-revving ... they now feature four valves per cylinder, ... valve covers, crankcases, and even exhaust.

Exhaust-port treatments are necessary in order to evacuate the cylinder. They are a function of thermodynamics and the supersonic speeds usually evident during blowdown, and this process should ...