Hello. I am trying to figure out my compression ratio and I'm getting some conflicting #'s.
Here is my setup-
B18C1 block (should be a .030" piston to deck clearance, correct?)
B16 head, milled .040"
Endyne Rollerwave, 84.5mm
Trying to pick a headgasket to get 10:1 compression

Using this calculator (http://www.c-speedracing.com/howto/c...c/compcalc.php) and stock headgasket thickness I get right around 10:1 assuming a piston dome displacement of -8.3cc. Can anyone else verify the Rollerwave piston dome displacement and the compression #?

Thanks
Ben

 

Here is an update if anyone cares-
The 84.5mm Rollerwaves do have a -8.3cc dome.
The best way to figure compression with a decked head is to cc the combustion chamber- use water with a little bit of dish soap added and keep adding water until it overflows when you put a plate of glass over the chamber.
Now that you have an accurate chamber cc you don't have to approximate anything. Just plug in the new chamber cc into the compression calculator and you pick the correct headgasket thickness for whatever compression you are shooting for.