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Posted by: CTATV
yeah its a three stroke 3 cylinder with tripple pink powerbands on each cylinder. its got 6 carbs and is going to put out around 130rwhp. the yamaha comanchee
Posted by: AlkyBurninX
The 700R and 'dales are the only SPORT quads with EFI. Some utility quads have it. Chances are its an open loop system which uses no O2 sensor so it will have to be mapped.
Rotorys are a decent design. I would consider them a 1/3 stroke engine (although there really isn't a "stroke"). Emissions are why 2 strokes are being banned and rotory's aren't much better unless they are turboed. They don't have valves, but ports like a 2stroke. You can't get the high compression needed for a complete burn in a rotory. Twin aluminum rotors would be neat in a quad though just because it would be different.
Posted by: AlkyBurninX
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Originally posted by: Russo400
My 4 stroke can smoke you all Period.
This board needs a "rolleyes" icon.
Posted by: AlkyBurninX
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Originally posted by: exrider4130
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Originally posted by: Markymannn
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Originally posted by: Raptor660Rshee350
The fucture of quads is proably going to be 4-stroke fuel injection.
I agree. So here's a question with fuel injection. So you do some mods like pipes and air box lids. With a carb you put in different jets. What happens with EFI? Does it have the "smarts" to automatically adjust the air/fuel ratio?
efi works just like your car. it has an ecu. the ecu will detect any small changes (exhaust, filter, airbox lid, etc.) and it will adjust for more air/fuel, spark advance and so forth. any big changes like bore, and an ecu upgrade or reflash will be needed
I depends on how the efi system works. Not all can adjust short and long term fuel trims. Most newer efi systems can, but I don't know what type atv's are using.
Posted by: snowbuster
wouldnt that be like a 2 1/2 stroke, imposible.
Posted by: snowbuster
And possible, unlike the "3 stroke engine"
Posted by: snowbuster
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Originally posted by: Raptor660Rshee350
The fucture of quads is proably going to be 4-stroke fuel injection.
And what are the two most recent quads? That would be fuel injected.
Posted by: Raptorlegs
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Originally posted by: Sparky8370
There could never be a 3 stroke engine. A 2 stroke fires everytime the piston reaches tdc (top dead center) well, actually a few degrees before depending on timing. A 4 stroke fires every other time. Each time it goes up or down it's counted as a stroke so a 3 stroke would have to fire at bdc (bottom dead center) every other time it fired which is 100% impossible as you need to compress the air fuel mixture to combust then where would it drive the piston? It's already down.
As for fuel map automaticaly adjusting the air fuel mixture that is untrue. You can have your computer re-mapped to fatten up the fuel mixture.
I was reading an article about a 2/4 stroke hybrid that was called a 3-stroke. Basically a 2-stroke style engine (no cam, piston/cylinder acts as valves) but it only fires every other time (4-stroke)
What are the advantagea? Low cost to produce, lighter weight and lower emissions than typical 2-stroke. Disadvantages? Limited power band and lacks 2-stroke power. May be your future weed wacker??????
Posted by: Raptorlegs
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Originally posted by: Soupbox660
I have never been so sad and depressed about people's knowledge of engines untill I read this thread. Good job everyone. Good job.
Yet you add absolutely nothing constructive to the conversation.
Please bless us with your vast knowledge of combustion engines. (where's the rolling eyes while jerking off smiley?)
Posted by: Raptorlegs
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Originally posted by: Jibrille
This thread is just bringing out all kinds of rocket scientists. hr>
Nah, I'm just a lowly brain surgeon.
Posted by: enFORCER
3 stroke?would that be like 2 compression and 1 exhaust????
Or 1 compression and 2 exhaust strokes?????
I think someone is pulling your leg.......
Posted by: DrDune
A 3 stroke engine? ........ next question please.
Posted by: deanz400
the new king quad and the LTZ450 are fuel injected .
Posted by: ostrich
So what exactly is a 3-stroke? I guess I just don't get it
Posted by: UltimateAussie
well twister cranks just down the road from me made the first 3 cylinder banshee motor
Posted by: whitebroskfx440
3 stroke i don't think but i saw a 6 stroke v twin in a street bike i think ducati makes me but im not sure from what i read i hear it has massive power amounts
Posted by: emeraldisleatv
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Originally posted by: Russo400
Who need 3 strokes!!!My 4 stroke can smoke you all Period.
You mean your 400ex?????????
Posted by: Jibrille
This thread is just bringing out all kinds of rocket scientists.
Posted by: ubertrailblazer01
anyone know how the hell a 6-stroke works? intanke, compression, detonation, exhaust, ????
Posted by: Raptor660Rshee350
3 stroke? how would that work?
Posted by: Raptor660Rshee350
i have no idea how that would work, dont believe everything you hear.
Posted by: Raptor660Rshee350
The fucture of quads is proably going to be 4-stroke fuel injection.
Posted by: Raptor660Rshee350
Its called maping
Posted by: Raptor660Rshee350
The 700R and the cannondales are the only quads with fuel injection as of now. I think the samethink that that happened with cars and trucks in 86 is going to happen with quads in the near fucture. They are all going to convert to fuel injection. Fuel Injection means cleaner burning fuel. I dont care one way or an another beacuse i know for a fact that a properly tuned carb is capeable of producing big horsepower numbers.
Posted by: Markymannn
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Originally posted by: Raptor660Rshee350
The fucture of quads is proably going to be 4-stroke fuel injection.
I agree. So here's a question with fuel injection. So you do some mods like pipes and air box lids. With a carb you put in different jets. What happens with EFI? Does it have the "smarts" to automatically adjust the air/fuel ratio?
Posted by: XtremeSkier
u been talking to TPR latelyimg src="i/expressions/face-icon-small-tongue.gif" border="0">img src="i/expressions/face-icon-small-tongue.gif" border="0">img src="i/expressions/face-icon-small-tongue.gif" border="0">img src="i/expressions/face-icon-small-tongue.gif" border="0">img src="i/expressions/face-icon-small-tongue.gif" border="0">img src="i/expressions/face-icon-small-tongue.gif" border="0">img src="i/expressions/face-icon-small-tongue.gif" border="0">
Posted by: XtremeSkier
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Originally posted by: emeraldisleatv
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Originally posted by: Russo400
Who need 3 strokes!!!My 4 stroke can smoke you all Period.
You mean your 400ex?????????
yeah thats what he meant...and it got him banned too
Posted by: XtremeSkier
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Originally posted by: spyder6
i think a scrambler could beat a 400ex hr>
Posted by: spyder6
i think a scrambler could beat a 400ex
Posted by: Russo400
Who need 3 strokes!!!My 4 stroke can smoke you all Period.
Posted by: Kawizuki400
I have heard about a new and exciting sport 4 wheeler, speaking of odd stroked engines. Polaris is coming out with 51 stroke diesel powered monster. It has all the normal strokes, and then 47 useless ones.
Come on people. 3 stroke engines . . . Jesus Christ.
Posted by: Soupbox660
I have never been so sad and depressed about people's knowledge of engines untill I read this thread. Good job everyone. Good job.
Posted by: strongtyerYFZ
Would a 1 stroke motor be possible? I guess not if a 2 stroke already fires at top dead center every time.
I've got an idea. How about a 2 cylinder engine. One cylinder is a 4 stroke and the other is a 2. LOL! I wonder what that would sound like. There would be too much weight for its purpose anyways... lol
Posted by: strongtyerYFZ
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Originally posted by: BADSHEE
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Originally posted by: Russo400
Who need 3 strokes!!!My 4 stroke can smoke you all Period.
his freinds must ride 250's.....................
250 four strokes that is
Posted by: strongtyerYFZ
Sweet! Does it come out after the 2.1 stroke 6 cylinder turbo breeze or before it? Hope it comes in hot pink!
Posted by: 87250xman
Rotarys arent that great. They dont have a high quality design like regular motors. They have have a habbit of leaking oil after being used often.
Posted by: 87250xman
No just the design.
Posted by: mfvii
amen to that.
Posted by: mfvii
I found a link that explains how the ducati 6 stroke engine theroetically works6 stroke.
I also found a page that has a descritpion of what a 3 stroke engine would operate like. And If you search on the web, some RC cars operate using these engines. 3 stroke
Posted by: mfvii
no. stroke is different than the number of cams an engine has.
Posted by: MdotHolla
Anyone know if a 3 stroke atv would ever come out? I have heard random rumors that yamaha is making one in place of the banshee or something along those lines...Anyone have any input or info that you can share?
Mike
Posted by: MdotHolla
I didnt believe the person who told me, but I thought it would be clever and unique if yamaha or someone came out with a different designed engine in place of the 2 storkes they discontinued..
Mike
Posted by: Storj
they should put a rotary engine in quad that would be sick
Posted by: Storj
what bad gaskets or something
Posted by: TheNadine
Fuel injected sport quads was a bad idea from the first time it got thought up, i say this from experience considering I own a Cannondale and ride with a few people that got rid of theirs in favor of having a carb again. and for my thoughts on this post...
Posted by: TheNadine
My EFI is very functional, but it just gets too twitchy, Im going to go back to a carb soon enough
Posted by: Splat
I am going to ask someone if he cares about some traffic - he has changed over a quad to throttle body fuel injection, pretty cool. He made his own control board and everything. will let ya know
Posted by: MrCrazyfoot
I think manufactures should direct all of there focus on perfecting the four stroke engine. Just look how far four strokes have come in the last tens or so years. And think how much farther they they can still come.
Posted by: Sparky8370
There could never be a 3 stroke engine. A 2 stroke fires everytime the piston reaches tdc (top dead center) well, actually a few degrees before depending on timing. A 4 stroke fires every other time. Each time it goes up or down it's counted as a stroke so a 3 stroke would have to fire at bdc (bottom dead center) every other time it fired which is 100% impossible as you need to compress the air fuel mixture to combust then where would it drive the piston? It's already down.
As for fuel map automaticaly adjusting the air fuel mixture that is untrue. You can have your computer re-mapped to fatten up the fuel mixture.
Posted by: Sparky8370
single, dual, and twin overhead cam.
single= 1 cam with intake and exhaust lobes
dual= 2 cams, 1 intake & 1 exhaust
twin= 2 cams, both with intake and exhaust
Posted by: Sparky8370
PS
duals are more commonly found on "in-line" type motors and twins are more commonly found on "V" type motors
Posted by: 1bad450r
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Originally posted by: TheNadine
Fuel injected sport quads was a bad idea from the first time it got thought up, i say this from experience considering I own a Cannondale and ride with a few people that got rid of theirs in favor of having a carb again. and for my thoughts on this post...
hr>
I agree with you Nadine. About both the injection system and the post.
Posted by: BADSHEE
Quote
Originally posted by: Russo400
Who need 3 strokes!!!My 4 stroke can smoke you all Period.
his freinds must ride 250's.....................
Posted by: BADSHEE
Posted by: MarkFiddling
There was SOHC, DOHC, now TOHC?
Posted by: exrider4130
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Originally posted by: Markymannn
Quote
Originally posted by: Raptor660Rshee350
The fucture of quads is proably going to be 4-stroke fuel injection.
I agree. So here's a question with fuel injection. So you do some mods like pipes and air box lids. With a carb you put in different jets. What happens with EFI? Does it have the "smarts" to automatically adjust the air/fuel ratio?
efi works just like your car. it has an ecu. the ecu will detect any small changes (exhaust, filter, airbox lid, etc.) and it will adjust for more air/fuel, spark advance and so forth. any big changes like bore, and an ecu upgrade or reflash will be needed
Posted by: ryanwolfe911
Check out Trinity Racing's website. They already have a fuel controller for the Raptor 700r.
Posted by: ryanwolfe911
Why in gods name would you do such a thing , unless the EFI system on your Cannondale is some sort of rudimentary open loop only EFI system. I can think of 50 reasons why fuel injection should be on all ATV's, and I have to wonder why it took so long for it to appear. I see people do this with cars all the time( Like taking the throttle body fuel injection off of their trucks and putting a carb on it) Most of the time , it's just cause they do not have the know how to properly diagnose a malfunctioning EFI system, and it's reall sad.
Posted by: ryanwolfe911
The only time I had considered removing EFI is for the Pikes Peak Hill Climb, as the rules explicitly prohibit Fuel Injection, Nitrous, or forced induction. i suspect they will modify the rules as more EFI equipped quads come on to the market.
