Introducing our carbon turbo tube for the Honda FL5, a direct replacement for the OEM metal turbo tube. Using the same design brief as the FK8 tube, we developed the FL5 version with three main goals:
1) Volume: Inlet diameter – increases from the Eventuri 78mm to 88mm at the intake end. In comparison, the OEM tube starts at 76.5mm and remains at this diameter all the way to the turbo intake. This means a more than 32% increase in cross-sectional area at its maximum point. The OEM FL5 tube will not impose any restriction on the turbo at stock boost levels, but we expect the larger tube will benefit at higher boost levels where airflow demand increases.
2) Flow Quality: Large internal volume alone is useless unless the flow path also allows for smooth airflow to the turbo. By using high temperature pre-preg carbon fiber, we were able to achieve a smooth internal surface. In contrast, standard inlet tubes are made from cast aluminum and have a rough internal surface. This, combined with the smooth curvature of the elbow, results in a flow path that minimizes turbulence.
3) Temperature: The final criterion was to minimize heat transfer to the airflow. A standard inlet connects directly to the turbo, so as soon as the turbo spins, it transfers heat. Our system uses a machined flange that connects to the turbo, then a silicone coupler with a built-in thermal spacer to keep the carbon elbow from directly contacting the turbo. This barrier, combined with the poor thermal conductivity through the thickness of the carbon fiber, means less heat is transferred to the airflow.
It is introduced on Ameblo's "M&M HONDA's Honda Honki."
https://ameblo.jp/mandm-honda/entry-12596987154.html
Please watch the M&M HONDA YouTube video.