WEB：
As this is the first Half-8 class engine, could you please share the details of the development process?
STAR MOTOR :
As we had no engine of this size, we had design every part from scratch. This enabled us to fully utilize the latest 3D CAD design system that allowed us to simulate and test parts thoroughly before we went into production. With measured progress through each stage of development, we were able to achieve our desired result.
WEB：
Why did you decide on the same style of rear exiting exhaust as used in larger racing engines for the SIRIO 09?
STAR MOTOR :
Actually it is easier to manufacture an engine with a side exhaust, but we wanted to reproduce the same style of the World Champion Inferno MP777. After all, this was the basic concept of the Mini-Inferno 09. Also, we could produce highly efficient intake and rear exiting exhaust with a .21 engine, so we aimed to do the same on the 09. A rear exit exhaust provides the best opportunity to develop a more powerful engine. And a side exhaust limits the options when it comes to mounting on the chassis.
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WEB：
The same could be said for the slide carburetor. You did well to develop this for the SIRIO 09 as well.
STAR MOTOR :
In development with KYOSHO, our biggest problem was producing an engine that would fit into the limited space available without compromising on anything. While considering future applications, we put a lot of effort into achieving this and any required modifications were made without hesitation. The carburetor was a good example of this as we had to clear many problems to maintain the level of performance while achieving easy linkage operation. We had many ideas, but the big leap forward was this carburetor. If you look you can see the carburetor and crankcase are a one-piece structure. This cleared the problems of limited space and was suitable for consistent mass production. This is more reliable and powerful than a rotary carburetor.
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