I guess I'll start with a few pictures. I used the diagram produced by "Best" and "Triplecrown" to get started. I followed the specs of a DT 200 head. My goal is a 22cc chamber. A stock head is 23CC's. First time off the lathe I had the chamber at 18cc's,so I had to re-cut too 22CC's. I had to do this (on and off the lathe) four times. re-CCing each time to check my work. REMEMBER....Everything you see here can be done without spending a ton of money.
Removing about .130 thousandths off of the head.
Cutting an 11 degree squish band.
Squish band is done.
Using a perfectly round geometrical object (sphere) to help sand the hemi combustion chamber that I already cut before this picture was taken. Almost anything will do. This was a large fishing anchor. A super ball works well too. When you dye the chamber blue,then use a ball with sand paper,you can see where you need to remove material.
Thumb is getting sore!
The combustion chamber is looking better!
Here's a picture next to the arbor.
Time to "CC" the chamber.
Save a buck! A flat cd case works great! drill a hole in it.
looks like this.
Removing about .130 thousandths off of the head.
Cutting an 11 degree squish band.
Squish band is done.
Using a perfectly round geometrical object (sphere) to help sand the hemi combustion chamber that I already cut before this picture was taken. Almost anything will do. This was a large fishing anchor. A super ball works well too. When you dye the chamber blue,then use a ball with sand paper,you can see where you need to remove material.
Thumb is getting sore!
The combustion chamber is looking better!
Here's a picture next to the arbor.
Time to "CC" the chamber.
Save a buck! A flat cd case works great! drill a hole in it.
looks like this.
Last edited: