In the vids the engine is all stock.But as of 2 weeks ago i have mod the piston and head but still kept the stock squish for now,And the squish is 27 in my engine.

The squish on my F273s reads close to your number also.

When you have time, would enjoy seeing the mods you are doing
on the piston and cylinder. Anything your willing to share about
tweaking a CY will be appreciated.

Thanks