How an engine works.

[krazykurtk]

I think there are a few of you out there that could benefit by understading how an engine works. I ran across this one time. It's pretty neat.
http://www.howstuffworks.com/engine.htm

[RedRage300ex]

so does the spark plug fire every time the piston is on its compression stroke? Then wouldnt the spark plug get pooped out pretty quick?

[RideRed04]

the compression stroke is every other time the piston hits top dead center (tdc). The piston goes down, and sucks gas and air into the engine (intake valves open). The piston goes up, compresses the stuff, and the plug fires just after it hits tdc. The way down is the power stroke, and the way up the exaust valves open and the mixture is forced out.

[Chef]

Doesnt the plug on a two stroke fire every other time the piston comes up, and a fourstroke on every 4th time? If thats right, the 4 strokes are the real high revvers here..

yea, but 4s hav cams and valves that 2s dont hav to deal with, 2 in the revs r better

[worm]

a stroke is every time the connecting rod goes up or down... a 2 stroke fires everytime the piston is up....

2 strokes...first stroke..rod goes up to compress gas...fire....2nd stroke.... rod-piston goes down ...ets gasses out of the cylinder...

4 strke plug fires every other time the piston is up....
1st stroke ....piston up comress gas....fires...2nd stroke...piston goes down ,power stroke...3rd stroke ..piston goes up and pushes gases out the valve in cylinder..4th stroke piston goes down and fuel enters cylinder....

[Leo]

of course, the way the 400EX's ignition system is setup the plug fires every revolution just like a 2-stroke motor would....

the trigger for the coil is on the crankshaft, it can't tell the difference between compression or exhaust.. so every other firing of the spark plug is wasted on the exhaust stroke :D

Leo

[RideRed04]

The reason a 250 2 stroke will run with a 450 4-stroke is becuase the plug fires every revolution. In a 2-stroke, the piston is the valves. I would bet that all this info is on the website link that krazykurtk posted.

[MOFO]

Originally posted by Leo
of course, the way the 400EX's ignition system is setup the plug fires every revolution just like a 2-stroke motor would....

the trigger for the coil is on the crankshaft, it can't tell the difference between compression or exhaust.. so every other firing of the spark plug is wasted on the exhaust stroke :D

Leo


I did not know this Leo...thanks for the info. I guess you learn something new everyday. :D But now that I think about it....it makes sense.


Eric

[Lorduss]

4 strokes are low rpm engines, 2 strokes are called screamers,
in the engines i run in my RC cars, .15 CC,
those engines hit 30K+ rpms, no joke, thats 30,000 rpms, some race engines go higher.
4 strokes of the same size, i think around 8K rpm.
same thing with our bikes.

[True rider]

On two strokes the intake stroke and the exhaust stroke are sometimes mixed which is why two strokes have more of a harder hitting pwerband and uneven rpms

[whiteknuckle]

yeah i have an rc10-gt r/c stadium truck all tricked and modded pout and that sum***** screams! does 65 mph!

[Z400central]

lorduss- you wouldnt happen to be from maxxtraxx would ya?!?! im tmaxxpower from there....:)

[Lorduss]

Actually yes i am from maxxtraxx, im Lorduss everywhere, this is like the maxxtraxx of 400exs to me, hehe

"yeah i have an rc10-gt r/c stadium truck all tricked and modded pout and that sum***** screams! does 65 mph!"

yeah, right, maby if you had a .21 in it, Dream on, if your running small block your hitting 45 tops.