Does anyone know the compression of Wiseco K542M845 pistons in B16 block + head? In thier list it is 8.4-8.8 for a B20 w/ B16 head.

I also found this;
Arias 3320900 piston yields 8.2 in full B16 and 9.3 in B20/B16 (1.1 difference, also for 84mm and 85mm)
JE 199888 piston yields 8.3 in full B16 and 9.0 in B20/B16 (0.7 difference, aslo for 84mm and 85mm)
So looking at other manufacturer's info doesnt help.

I also calculated the compression on c-speed calculator and came up with a compression of 7.4 or something.

I really need your help guys

 

That's a good question bro..
I want to know too

 

Anyone?