One of the performance options available to a Savage owner is the Wiseco High Compression forged piston. I have seen some advertisements for the Wiseco that state a compression ratio (CR) of 10.5:1. The stock engine has an advertised CR of 8.5:1. So the Wiseco is supposed to increase compression by two points.
Given the Wiseco’s modest .060” pop-top, a two-point increase seems a little optimistic. I decided to take a good look at the Wiseco to figure out exactly what the real compression ratio is.
I opted to use the on-line calculator at RB Racing. It has inputs for the deck height along with the valve reliefs. All I would have to manually calculate was the volume of the pop-top.
Here is a link to the RB calculator. It is a good tool, save it. They also have a bunch of other calculators on their site.
https://www.rbracing-rsr.com/compstaticcalc.html