Ever wonder what's inside an actual engine?

sequoias said:
Heres one thing I've been wondering.....is there a maximum rpm that a combustion can keep up? Like if the engine is running too fast and the combustion of fuel is doing fast as it can. I know that some motorcycle engines can go up to 15,000 or so rpm....I am trying to picture how fast combustion happens in every 4 cycle.

R/C (radio control) 2 cycle nitro fueled engines can go up to 40,000 or so rpm. They are very small, less than 1 cu inches. I think nitro burns faster than unleaded gasoline.
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coincidence?
I was wondering about combusion process?... as we're in a Nanometer technology. there's no telling... but I'm really courious about it too...
 
crankshaft said:
HMMMM?. I bet to differ sire.. I used to have 2006 YamahaYZF-R6 (598cc) the redline is 15.5K RPM. it is 4 stroke.

here's the link I've provided...

2008 Yamaha YZF-R6S Features & Benefits, model features

I have used it for trackdays extensively. had no problems with it... the only problem I had to replace rear tire more often than I do on oil change... LOL


Just sayin'
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Wow, the tires sure have a short life, LOL!
 
crankshaft said:
coincidence?
I was wondering about combusion process?... as we're in a Nanometer technology. there's no telling... but I'm really courious about it too...
Click to expand...

Yeah, very true. A process inside an engine does it so fast, it's like a blur!
 
god, this thread brings back memories, I was a mechanical engineer student for 2 years, then i chucked it, (reason withheld). but the thing is, yes I understand 2 strokes, 4 strokes, and Rotarys.
yes 4 strokes can redline quite high even a 250cc Jap bikes could do 18,000-20,000

Redlines has a lot to do with, how light the valves are, and how the conrods, cranks, and pistons are all evenly balanced how close it is to the blue print, (being blueprinted is a different matter - it is even closer to 'perfection' so you get higher rpm, smoother ticks over and so on) , and optimised to run at that rev range.

Crankshaft your bike sounds cool.....

just wonder have you ever ridden a fast two strokes?
these days four stroke dirt bikes have AMAZING powerbands... I only heard about it, never rode one of those newer two-stroke bottom ened fourstrokes, except an early Husquvarna 510TE, shit that thing was FAST !!!
aircraft engines are fascinating, they developed so fast in the 30's -40's until they done away with conrods, it ended up being Jets.....Jets is like 'by-pass' combustion instead of internal combustion, external combustion were steam engine on trains.
 
Grummer said:
god, this thread brings back memories, I was a mechanical engineer student for 2 years, then i chucked it, (reason withheld). but the thing is, yes I understand 2 strokes, 4 strokes, and Rotarys.
yes 4 strokes can redline quite high even a 250cc Jap bikes could do 18,000-20,000
Mine did 13,500-14,500...it was a Honda VT250 V-twin, lovely little bike, great handlnig you could dig deep in corners and scrape footpegs....;)

Redlines has a lot to do with, how light the valves are, and how the conrods, cranks, and pistons are all evenly balanced how close it is to the blue print, (being blueprinted is a different matter - it is even closer to 'perfection' so you get higher rpm, smoother ticks over and so on) , and optimised to run at that rev range.

Crankshaft your bike sounds cool.....

just wonder have you ever ridden a fast two strokes?
these days four stroke dirt bikes have AMAZING powerbands... I only heard about it, never rode one of those newer two-stroke bottom ened fourstrokes, except an early Husquvarna 510TE, shit that thing was FAST !!!
aircraft engines are fascinating, they developed so fast in the 30's -40's until they done away with conrods, it ended up being Jets.....Jets is like 'by-pass' combustion instead of internal combustion, external combustion were steam engine on trains.
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I figured it's the design of the engine which helps it to rev at really high rpms (more likely short stroke design) Long stroke engines tend to have more torque while short stroke tend to have higher horsepower but creates more heat.
 
thats neat..while i was in vo-tech years ago they dont have veidos like that just maunal books which i still have somewhere..
 
I have been watching this video closely, theres something wrong it doesn't show the exhaust stroke, when the piston comes up as the spent air/fuel mix expels from the chamber through the exhaust valves when at TDC. Have anyone else noticed this?
 
Grummer said:
god, this thread brings back memories, I was a mechanical engineer student for 2 years, then i chucked it, (reason withheld). but the thing is, yes I understand 2 strokes, 4 strokes, and Rotarys.
yes 4 strokes can redline quite high even a 250cc Jap bikes could do 18,000-20,000

Redlines has a lot to do with, how light the valves are, and how the conrods, cranks, and pistons are all evenly balanced how close it is to the blue print, (being blueprinted is a different matter - it is even closer to 'perfection' so you get higher rpm, smoother ticks over and so on) , and optimised to run at that rev range.

Crankshaft your bike sounds cool.....

just wonder have you ever ridden a fast two strokes?
these days four stroke dirt bikes have AMAZING powerbands... I only heard about it, never rode one of those newer two-stroke bottom ened fourstrokes, except an early Husquvarna 510TE, shit that thing was FAST !!!
aircraft engines are fascinating, they developed so fast in the 30's -40's until they done away with conrods, it ended up being Jets.....Jets is like 'by-pass' combustion instead of internal combustion, external combustion were steam engine on trains.
Click to expand...

Thanks Grummer. I would have to agree with you on blue printed engine..they can go real high on RPM and would not show any heisiation.. actually it can go faster. but they'll have to switch to nitromethane due to they burn faster than gas... but more $...

.. No I have never rode 2 stroke rocket bike before.. but I did on dirt bike back in my younger age.... but I imagine 2 stroke engine would be the best in Hp to weight ratio compare to 4 stroke.. but I'm sure the EPA. is not going to like it at all for street application.

but those 4 stroke rocket bike (inline 4) on today's bike is stupid fast IMHO it cease to amaze me how fast it can go.:-o now they're selling kawasaki ZX14 1400CC rocket bike.. sheesh.. In my opinion... 600 CC is fast enought.. maybe I'm being skeered?... lol...

speaking of turbine engine.. if I had money to piss away.. this is the first thing I would snatch... (wink) check the link...

MTT - Leading Turbine Innovation
 
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