Originally Posted by
Riketsu
I thought I should ask here instead of just opening a second thread...
When humidity comes into play... If you have a very high humidity should you remove shims or add shims?? What is the reason behind this? (So I can reason it in the future).
Thanks guys.
If you are going into high humidity, you should add shims to the head. The humidity is taking the place of the oxygen in the air. Water does not compress like air. Inside the combustion chamber the water droplets turn into steam. This creates heat, and can make detonation worse. You are safer to decompress the engine in high humidity, and heat.
