Holiday Inn Express, LOL!
There's probably a lot of us that don't understand psi as it relates to combustion. If I understand this somewhat correctly, the psi rating that the labs use is somehow related to gas expansion at a specific point or time very early in the combustion process, or, more specifically, a psi measurement relating to the maximum velocity of a pressure wave derived at a known time or point in the rate of expansion or combustion...?
