Welcome • User Guide
ToS • Privacy • Canary
Donate • Bugs • License

©2025 Poal.co

(post is archived)

You are currently inside a comment thread.
Click here to see all the comments (158).
[–] • 0 pt

So two of your articles say roughly or ideally, not always. The other seems to be hyperbole, because there are clearly engines where peak pressure is not exactly at 14 degrees after top dead center. So you're taking something that's not a hard law of science but a general rule for a particular engine type and asking how that general rule became a hard law of science without a god. It didn't. So what are you even talking about?

[–] • 0 pt (edited )

It's always at 14 degrees no matter what. The only reason you stray from there is because you're worried about detonation blowing a con rod out the side of the block or cracking a ring land, capice?

This is why diesel engines don't rev high, they rev low because they don't have spark plugs to time combustion, it always happens after TDC, so the faster the piston moves the faster the piston moves away from the combustion process, until the combustion happens long after 14 degrees.