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Other O-series engines, however, cannot run on unleaded without modification of the cylinder head or use of an additive. By 1987, British Leyland (now known as the Rover Group) equipped the O-series with a 16-valve cylinder head for the Rover 800. This 2.0 L unit was known as the M series, and was further reworked into the T series in 1992. The ...
In a piston engine, the cylinder head sits above the cylinders, [1] forming the roof of the combustion chamber. In sidevalve engines the head is a simple plate of metal containing the spark plugs and possibly heat dissipation fins .
Identical cylinder head assembly (“top end") to conventional engines. Most existing head technology can be either adapted or utilised. Flexible design - can be four-stroke, two-stroke, petrol, diesel or gas, natural or forced aspiration. Eliminated irregularly reciprocating components such as connecting rods. No second order balancing required.
Rotary valves could allow for a more compact and lightweight cylinder head design. They rotate at half engine speed (or one quarter) and lack the inertia forces of reciprocating valve mechanisms. This allows for higher engine speeds, offering approximately perhaps 10% more power. The 1980s MGN W12 F1 engine used rotary valves but never raced.
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The rocker ratio is the distance travelled by the valve divided by the distance travelled by the pushrod effective. The ratio is determined by the ratio of the distances from the rocker arm's pivot point to the point where it touches the valve and the point where it touches the pushrod/camshaft.
If you’re stuck on today’s Wordle answer, we’re here to help—but beware of spoilers for Wordle 1310 ahead. Let's start with a few hints.
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