IAME is a specialist engine manufacturer and the most famous engine company in the karting industry, thanks to its long, distinguished history. It is proud to introduce its new engine in the Parilla Screamer 2 Shifter classes. Let’s find out more
The Parilla Screamer 2 by IAME includes modifications to almost all the components of the previous model, particularly in the cooling system. Our analysis begins with the cylinder head, which now consists of three pieces, all machined from a solid block: the outer cover, the body of the head and the actual combustion chamber itself. The outer cover can is easily removable from the other two elements, which are assembled together by force. The solution with a two-piece head is also approved and can be used. The head cooling system is now more efficient, especially in the area below the spark-plugs, thereby improving low-end acceleration. The previous solution, with a portion of the head obtained by casting, resulted in a hotter area and greater thrust at strong>high revs after the maximum point of power, commonly called “over-revving”, but less low-end power. Indeed, the cylinder and the head need cooling, within certain limits and, depending on how and how much this is done, there is an effect on reliability, as well as performance.
The goal of the new KZ engine by IAME KZ was an improvement to low-end power, to increase drivability. An increase in the diameter of the lower cylinder slots, through which the water passes, provides greater cooling of the exhaust system and further optimises performance at low and medium revs. Speaking of the cylinder and the head, now the coupling has 6 screws, instead of 5, while the liner is completely detached from the upper part of the cylinder, ensuring more room for expansion when the engine becomes hot and avoiding critical deformations and tension of the metal. The cylinder can therefore expand more uniformly with the piston at the different temperatures of engine operation, to the advantage of the tolerances between the two elements. This is an important aspect, given that the cylinder tends to cool down more at the front due to the air flow when the kart is moving. The new Screamer 2 is also available with the Factory Kit, an advanced solution compared to the Standard version, with more of an effect at higher revs and greater potential in terms of performance.
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