Compression Ratio NZ frankenstein

[KenTK808]

Can anyone give me a definitive answer on what the compression ratio is on a 2NZ head put onto a 1NZ block? I'm looking for the bump in displacement but to keep my newer head. I have both motors already. 3rd gen 2014 Yaris

[ncp13]

Hello

Tough one..

Measure the total thickness of the the head and the chamber ccs

[Bluevitz-rs]

As far as I know the only difference between a 1NZ and 2NZ is the stroke length. The heads should be identical.