Why Is the ICBM Developed?
Customers requests boring and honing process for triples, and we deliver the product with precise clearance, such as 0.067 mm, exactly as specified.
However, after the break-in operation and a single full-throttle run, the ring noise starts to occur.
This happens because the piston rings jump into the big ports and move up and down, causing them to collide with the upper and lower edges of the ports. This leads to abnormal wear at those areas.
No matter how precise the machining (and even if the correct port chamfering is performed), this problem cannot be resolved. To solve it, we concluded that the only option is to remake the sleeve, addressing the sleeve material and the port design (such as using a bridged port)
This happens because the piston rings jump into the big ports and move up and down, causing them to collide with the upper and lower edges of the ports. This leads to abnormal wear at those areas.
No matter how precise the machining (and even if the correct port chamfering is performed), this problem cannot be resolved. To solve it, we concluded that the only option is to remake the sleeve, addressing the sleeve material and the port design (such as using a bridged port).