Determining a port opening number videos

[czar800]

I made a few quick videos of how I determine a port opening number.
So what is the Exhaust Number I your opinion.

 

[mdavlee]

I would go 104°. I shine a light in the bore and when I can see the bevel at the top edge of the piston is where I call it. But it is very subjective to who's looking at it.

 

[czar800]

I would go 104°. I shine a light in the bore and when I can see the bevel at the top edge of the piston is where I call it. But it is very subjective to who's looking at it.

I agree it's very subjective.