1 Cylinder low compression need help

[i_build]

Ordered an ELRING HG just to bolt the head back on and test again. Not sure whether the rings seated right or not during break in. Will fill her with the right amount of oil after reassembly and I cleaned...

[i_build]

Here's a better picture of the cross hatching as is now... also a pic of the plugs and how bad that 1 was... and a pic of the valve I suspected but am questioning whether my test was valid. That one...

[i_build]

I did hone the cylinders well and the cross hatching is still there but I am not sure whether what I am seeing is what is right... I clocked the rings as well as used break in oil and have changed since...

[i_build]

This is a dumb question and will show the fact this is my first rebuild... I did gap the rings and I did not get into boost until after about 300 miles of driving on highway and on local roads and at...

[i_build]

I lapped the valves because I was replacing them due to a timing belt skip at startup the last time I installed the head over a year ago. Other than the plug being black and smoke coming from both the...

[i_build]

When I did the leak down with the valve cover off I felt the air coming out from the exhaust valve spring. I even placed a piece of paper towel over the bitch tube inlet to the head and it didn't move....

[i_build]

I put on about 400 miles after building an M20 with an E bottom end and I head. Rebuilt the lower end with new bearings and rings and top end needed new valves and stems... machine shop tested the head......