Quote Originally Posted by axa View Post
So I've just completed measuring the actual displacement of a stock 167fmm...

I used a liquid volume method using compressor oil.
Measuring the piston contribution was the most difficult part.
It was difficult sealing the depression it created in the molding compound to get an accurate measure before it started to leak...

But i would estimate I'm within 3 %err.

Anyone care to take a guess what our actual compression ratio is?
8.5:1