Porting and Polishing Experience
#21
04-04-2018, 09:17 PM
Two primary goals, first, don't remove too much material that you breach a water jacket; two, you are seeking a smooth progressive transition from valve bowl to gasket matched port exit. Eliminate any bottleneck in transition and avoid removing too much in transition. Besides increasing the volume of the port flow, you are also seeking to maintain consistent velocity. Remove too much and the gasket is restricting flow. Remove too little and there is a bottleneck near the valve.
#22
04-04-2018, 09:35 PM
Two primary goals, first, don't remove too much material that you breach a water jacket; two, you are seeking a smooth progressive transition from valve bowl to gasket matched port exit. Eliminate any bottleneck in transition and avoid removing too much in transition. Besides increasing the volume of the port flow, you are also seeking to maintain consistent velocity. Remove too much and the gasket is restricting flow. Remove too little and there is a bottleneck near the valve.
#23
04-07-2018, 01:25 PM
I’ve watched some tutorials on how to port and polish, and in particular Eastwood has one. I am going to get a dremel to notch my thread chasers, and am really starting to consider port matching the intake and exhaust ports.
I am thinking to go into it as more of a polish and see how it goes with 80 grit. Stay away from carbide bits or the more invasive tools.
just using the sandpaper, and not bothering the valves, what is my risk of catastrophic error?
I am thinking to go into it as more of a polish and see how it goes with 80 grit. Stay away from carbide bits or the more invasive tools.
just using the sandpaper, and not bothering the valves, what is my risk of catastrophic error?
#25
04-07-2018, 01:42 PM
#26
04-07-2018, 01:42 PM
do you use a marker or do you have the machinists coating?
#29
04-07-2018, 02:58 PM
#30
04-07-2018, 08:02 PM
