EddieNewYork

Sup fellas,

I'm assembling a Smithsonian model engine and wanted to know if the valves in this animation (link below) actuating as pairs are correct for the s2000 f20c (the manual the model came with are horrible and has mistakes). I was able to get cylinders 1,3, and 4 (see attached pic) to match the animation but will need to modify the last 2 lobes. Before I start hacking away I wanted to make sure this animation was correct to the s2000 engine, or as close to it as we all know it's not a dohc.

Looking at this animation (2nd gif from the top) these valves open and close together in this order.
These awesome GIFs show how your car engine works - Business Insider

1 - cylinder 1 intake valve & cylinder 3 exhaust valve
2 - cylinder 3 intake valve & cylinder 4 exhaust valve
3 - cylinder 4 intake valve & cylinder 2 exhaust valve
4 - cylinder 2 intake valve & cylinder 1 exhaust valve

DefSport

Firing order is 1-3-4-2 for all 4 cylinder Hondas I know of. Intake, Compression, Power, Exhaust strokes. Should be easy to work out what valves open when based on that.

Chuck S

If 1 is on power stoke the next to fire should be on compression followed by the next on compression, etc. In a 1-3-2-4 engine pistons 1 and 4 go up and down as a pair as do 3 and 2. When 1 is on power stroke 4 is on exhaust, etc. Inline engines are "flat crank."

There's an animation in the link below that should be helpful.

-- Chuck

https://www.quora.com/What-is-the-fi...ylinder-engine

EddieNewYork

Thanks guys, does that mean the link animation to the valves opening sequence I linked to is correct to the f20c or incorrect?