3 stroke??????

[offroader786]

i have been hearing people talk about a 3 stroke, thats gotta be impossible, if you have any info on it lit me know:D

[Ex King]

THERE IS NO 3 STROKE

[offroader786]

i know this, but other people think there is

[JATV250]

no such thing as a 3 stroke

[offroader786]

and if you think about it ther is a 2,4,6,8,10,12,14, and so on stroke:D

i think mazda has an engine that is like a 3-stroke..i think its called a rotary....i think the name is wrong..i heard very little about it last year....im sure it was BS though...but the person did say that was in the miatas

[offroader786]

yeah i saw that on history channel 2 night ago, its pretty cool, only one moving part

[Butters]

<--------------------

[offroader786]

VIVA LA 3 STROKA! hey if you find one i will take 2!:D you soanish mexican:bandit: ;)

[offroader786]

spanish*

Originally posted by JATV250
no such thing as a 3 stroke

ever hear of premature ejaculation:rolleyes:












:scary:

[JATV250]

yea, why?

[Butters]

you can edit your posts so you don't have to repost what you meant to say. works well. also you can delete the post that you didn't mean to do.. :D

[TheRedRebel17]

theres a 3 stroke.
you take a 4 stroke bottom end and bolt on a 250R top end..doh

[offroader786]

thanx master of the obvious!

[Narly R]

A 3 stroke would be cool if they worked hard enough they could do it!;)

[offroader786]

well they say that the rotary engine at a fraction of the size of a v-6 make about 235 hp, i bet someone will make a small one and throw it on a quad soon enough

[EXracer8604]

to bad a rotary engine isnt a 3 stroke lmfao

[Juggalo]

i wouldn't really consider a rotary engine a 3 stroke. its doesn't even really have a stroke. just a spinny triangle thing. yes rotarty engines are real and they were in RX7's not miatas.

3 stroke engines DO exist tho. you may ask how the hell does that work!? well lemme tell ya. basically you take a 2 cyl motor, and make one cylinder a 4 stroke and the other a 2 stroke. so your getting a power stroke once every three strokes, therefore 3 stroke motor.

[EXracer8604]

Originally posted by Juggalo
i wouldn't really consider a rotary engine a 3 stroke. its doesn't even really have a stroke. just a spinny triangle thing. yes rotarty engines are real and they were in RX7's not miatas.

3 stroke engines DO exist tho. you may ask how the hell does that work!? well lemme tell ya. basically you take a 2 cyl motor, and make one cylinder a 4 stroke and the other a 2 stroke. so your getting a power stroke once every three strokes, therefore 3 stroke motor.


Juggs, I can see how in Theory that would wor, but in reality, i just dont think it could happen. If you think about it, you would have to have a split in the tranny case for the different oils, plus if you had to split it, that would make one 4 stroke and one 2 stroke.

[FourFiftyFour]

Ive also heard of ppl refer to 4 stroke engine that run sorta like 2 stroke engines a "3 stroke" just cuz they sorta seem like a mix in between.... my cannondale sorta runs like a 2 stroke.. so sometimes i call it a 3 stroke just jokin around

[cabex]

i think that a 1 stroke should be make,

runs like a 2 but it fires on the top of the stroke and the bottom of the stroke

so theres a power stroke up and down!

just a thought

prolly could never happen

[offroader786]

that would be cool

[wilkin250r]

Rotary engines are awesome. My wrestling coach in high school had a little Mazda with a rotary engine. FAST, monkeyboy and his teckotty would be jealous. With fewer moving parts, they can rev really high.

[Fender Bender]

Not everyone from Oklahoma is as stupid as those two...:rolleyes:

[SGA]

A 4 stroke is called that because it the piston moves 4 times (2 down, 2 ) to complete its cycle, and start over again. It fires every two complete turns of the crankshaft, that is, every TWO times the piston is at the top, it fires
A 2 stroke is called that because the piston moves two times ( 1 down, 1 up ) to complete its cycle and start over again. It fires every one complete turn of the crankshaft, that is, EVERYTIME the piston is at the top, it fires.
A 2 stroke makes twice as much power as a 4 stroke, but it is not as efficient as a 4 stroke at burning the fuel charge in the cylinder, therefore making alot of pollution. (Unburned gas). Much research has gone into making a 2 stroke as clean as a 4 stroke. 2 stroke engines are starting to come with caytilitic converters on them, and computer designed combustion chambers.
Most diesel engines are 4 stroke, but some GM diesel engines are 2 stroke. They use cylinder ports for the intake like most 2 stroke, but use valves like a 4 stroke for the exhaust!

[sickmojave]

Originally posted by cabex
i think that a 1 stroke should be make,

runs like a 2 but it fires on the top of the stroke and the bottom of the stroke

so theres a power stroke up and down!

just a thought

prolly could never happen


that's how the steam engines worked :p

[SGA]

Steam produces tons of power, (Because so much energy is stored in it as heat) Super heated steam produces tons more of power, that why many ships use the boiler/reactor to make steam, to power the turbines which is tied to the propeller shaft. I think its the same in nuclear plants, the atomic energy heats the water to steam, the steam drives the turbines, which is tied to the generator shafts.

[hondafox440]

I have seen a '3 stroke' prototype. It is basically a V-Twin, with one 2 stroke cylinder and one 4 stroke cylinder. The power strokes of each cylinder are timed to aid in the compression strokes of the other, for more power. Very interesting design.

The rotary engine (as mentioned) came in the Mazda RX-7, which was produced from 1978-1995, but was in production cars in as early as 1967 (namely the Cosmo Sport, or Mazda 110S )

The problem with rotary engines is they are very difficult to design in order to meet the US emissions regulations. Also, they consume more fuel than a piston engine because the thermodynamic efficiency of the engine is reduced by the long combustion-chamber shape and low compression ratio.

[sickmojave]

Originally posted by hondafox440
The problem with rotary engines is they are very difficult to design in order to meet the US emissions regulations. Also, they consume more fuel than a piston engine because the thermodynamic efficiency of the engine is reduced by the long combustion-chamber shape and low compression ratio.

but if you could keep it together they would scream:eek2:

[Glow Plug]

Originally posted by hondafox440
The rotary engine (as mentioned) came in the Mazda RX-7, which was produced from 1978-1995, but was in production cars in as early as 1967 (namely the Cosmo Sport, or Mazda 110S )




the rx-7 was produced from 79- 95 wasn't it?

[PHIL_B54]

car and driver just did a reveiw on the new rx-8 the thing was like a 1.2 liter , 2 rotor engine, something like a 9k red line, that makes like 230hp with out turbo's like the rx-7's, they said the drawback was that it have no bottom end. they said you had to keep it up in the revs to get the horsepower.

i saw a sandrail in little sahara powered by a rx-7 engine, sounded a little funny but it hauled *****

[EXracer8604]

Originally posted by hondafox440
I have seen a '3 stroke' prototype. It is basically a V-Twin, with one 2 stroke cylinder and one 4 stroke cylinder. The power strokes of each cylinder are timed to aid in the compression strokes of the other, for more power. Very interesting design.





You guys are only thinking of the top end point of view on this theory, think about it like this, a v-twin has one crank. How are you gonna manage a 4 stroke and 2 stroke on one crank??? It would be a time bomb if it was even possible

[hondafox440]

Timing. As the 4 stroke side goes down, the 2 stroke is going up. Thats why it would be a 3 stroke, because the 2 stroke would fire twice during the 4 stroke's completetion of 4 strokes and 1 firing. 2+1 = 3. It makes perfect sense.

[goin2shock]

About rotary engines......
porshe and mazda have used them(video games are educational) look at gt3 aspec....its not a 3 stoke though

[EXracer8604]

Originally posted by hondafox440
Timing. As the 4 stroke side goes down, the 2 stroke is going up. Thats why it would be a 3 stroke, because the 2 stroke would fire twice during the 4 stroke's completetion of 4 strokes and 1 firing. 2+1 = 3. It makes perfect sense.


Theory wise it makes perfect sense, I am talking reality here ;)

[Chef]

What is keeping you guys from understanding this? The two stroke cylinder would out rev the four stroke cylinder, basically grenading the valve train, and the 4 stroke side would hold back hte 2 stroke. There is really no way to make the two different cylinders work together..

[SGA]

Originally posted by Chef
What is keeping you guys from understanding this? The two stroke cylinder would out rev the four stroke cylinder, basically grenading the valve train, and the 4 stroke side would hold back hte 2 stroke. There is really no way to make the two different cylinders work together..
I suppose you could change the port timing and powerband on the 2 stroke side so its peak power and RPM is more in line with the 4 stroke side. Anything can be done with enough money and determination. But would it be practical?

[EXracer8604]

Originally posted by SGA
I suppose you could change the port timing and powerband on the 2 stroke side so its peak power and RPM is more in line with the 4 stroke side. Anything can be done with enough money and determination. But would it be practical?

It would absolutely not be practical, you would have to have dual exhuast, two differnt gas tanks, one mix, one gas, i still think the 2 stroke would overrev the 4 stroke, otherwise it would bog

[stevengates45]

I have a three stroke.

[Juggalo]

dual exhaust is no biggy, and theres always oil injection. there was a site that had a working version but the site is no longer up. it was actually called the 2/4 stroke hybrid motor. it was linked on macdizzys site.