Cylinder Head 6

Started to clean up the intake ports. They will be expanded from the current size of about 1-1/4" to 1-3/8" and will be essentially straightened a little through the process. The boss for the intake valve will also be reduced in size. This is not considered radical for this engine. It should remain very tractable but should breathe easier and provide more mid-range torque and throttle response. Also gonna drink more. The numbers for this head are W-1628-8. That means that it is the 628th made and is set up for a 8:1 compression ratio. This head also has a very low lift set of camshafts as did all of the early models. In fact, it can't be changed to a higher lift like the xk120MC version without machining the lifter buckets to clear the cam lobes.


The last two shots are from the exhaust port toward the valve seat. I need a longer set of dies to finish up the rough-in.