I have never been on board with cylinder trenching. i would rather block and fill the intake port and case reed an engine before ever doing a trench. My biggest issue with it is it takes away cylinder wall support for the piston on the most critical spot for cylinder and piston wear (intake and exhaust port sides) which accelerates wear/damage by putting more force on the corners of the trench instead of distributing it more evenly across the face of the piston skirt.
The trench also adds case volume, which reduces case pressure for the transfers.
It will also alter intake charge pathing, and that can be detrimental to running and performance.
If you really want to adventure into advanced porting, then you can work on doing a boost port.
I would rather take my time to flow/port my case halves to the transfers, port match the transfers at the case and cylinder, and then stuff the case to an ideal volume to maximize pop pressure of the transfer ports.
If you REALLY want to get into it, you will need a right angle tool, such as a dentist drill or a small 90 degree pneumatic die grinder. Something like this one, which is what I bought a couple of years ago. I have used it a couple of times to practice on a couple of old junky cylinders so I can get some experience with porting transfers and correcting transfer angles.
The reviews are all over the place, but mine has a metal collet that hasn't broken yet, and all of my 1/8" bits fit it fine.
Another option is generic China made unit. https://www.walmart.com/ip/3Mm-90-D...-Abrasive-Tool-For-Metal-Polishing/3979061725
Otherwise, you will have to shell out at least about $200, closer to $300, for a bigger name like a Sioux or Florida Pneumatic unit.
The trench also adds case volume, which reduces case pressure for the transfers.
It will also alter intake charge pathing, and that can be detrimental to running and performance.
If you really want to adventure into advanced porting, then you can work on doing a boost port.
I would rather take my time to flow/port my case halves to the transfers, port match the transfers at the case and cylinder, and then stuff the case to an ideal volume to maximize pop pressure of the transfer ports.
If you REALLY want to get into it, you will need a right angle tool, such as a dentist drill or a small 90 degree pneumatic die grinder. Something like this one, which is what I bought a couple of years ago. I have used it a couple of times to practice on a couple of old junky cylinders so I can get some experience with porting transfers and correcting transfer angles.
The reviews are all over the place, but mine has a metal collet that hasn't broken yet, and all of my 1/8" bits fit it fine.
Another option is generic China made unit. https://www.walmart.com/ip/3Mm-90-D...-Abrasive-Tool-For-Metal-Polishing/3979061725
Otherwise, you will have to shell out at least about $200, closer to $300, for a bigger name like a Sioux or Florida Pneumatic unit.
