Your shopping cart is empty.
Product Qty Amount


The effect of con rod length

[email protected]
Con rods are part of the fundamental mechanism at the heart of almost every race engine in the world, and there is little to make me think that this is about to change. In dealing with the forces exerted on adjacent components by a con rod, we tend to split their mass into a reciprocating component, which we assume travels up and down with the piston, and a rotating component, which we assume travels around with the crankpin on which it operates. As race engine engineers, we generally take...

Coolant system efficiency

[email protected]
As the specific power of engines continues to increase over time, so does the demand on their cooling systems. And if an engine is delivering, say, 200 kW at any one time then roughly an equivalent amount of heat will also be rejected into the cooling system. Using my electric fire analogy that's 100 two-bar electric fires distributing all this through the vehicle radiator and into the local environment, and when put like that, it is a wonder we don't see more issues with the cooling...

Rod thrust face design

[email protected]
In terms of controlling the axial position and axial float (in a direction parallel to the crankshaft axis) of the con rod, there are two main methods of achieving this - crank-guided rods and piston-guided rods. As you may discern from the descriptions, the first type thrusts against the crankshaft, the second type against the piston. Crank-guided rods remain the most popular type for many kinds of race engine. Commonly, the contact between the crank and rod thrust faces is one of annular...

One sensor, many uses

[email protected]
"So how much information can you get from one sensor" is a question that many will ask at some time or other. A temperature sensor for instance can provide data to the engine ECU to determine the degree of fuelling required. That same information can be used to set the engine idle speed as well as any cold/hot-start strategy, and at the same time be relayed to the driver by some kind of temperature gauge. A 'bigger bang for your buck' is one way of looking at it, much...

Against all odds?

[email protected]
As described in a previous article under this keyword, there are many interesting engines that have their origin in amateur racing series. As mentioned, one of the technically most open motorcycle racing classes is the Supermono, and although this series is not as active and 'hot' as it was in the late 1990s, there are still many great single-cylinder race engine projects riding around. The engine that is the focus in this article has already been described to an extent in the...