What's a 2270?, Displacement clarifications Options

[McMark]

This question comes up every once in awhile, and did again in another thread. Rather than replying there I figured I'd make a new thread.

The 2270 number comes from 96mm pistons and 78.4 as the stroke. I'm pretty sure this 78.4 BS came from building motors for a racing class (probably under 2.3l) where people were trying to get as close to the limit as possible (more power).

But the reality is that most 2270 engines are actually just off-the-shelf 78 stroke cranks.

So 2258 is a better general reference term, I'd say it's more representative of what the engine is. But it doesn't roll off the tongue. I've moved to simply referring to them as 2.3l engines.

If you REALLY want to be accurate, the '2270' that I'm assembling right now had a crank 78.26 and a 96mm bore. So really it's a 2266... (IMG:style_emoticons/default/rolleyes.gif)

So call it a 2270, a 2258, or a 2.3l -- they're all the same idea and none are really all that accurate.