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2-strokes strike back?

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Old Jul 11, 2009 | 06:05 AM
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Default 2-strokes strike back?

hey guys, is this a fake or is it true? there had been rumers going around alot of forums in the net that they are making fuel injected 2-stroke engines that out perform the 4-stroke.

just read everything on this page and let me know what yall think.

Why 2-Stroke Direct Injection is a Big Deal
 
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Old Jul 11, 2009 | 09:10 AM
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As far as 2 strokes outpreforming 4 strokes,.... That's pretty much always been the case, when comparing displacements of the same size. That gap has been narrowing for a long time ( lately very quickly) as 4 strokes are coming along on their power to weight ratios, mostly due to one of many fuel injected designs.

I kinda like the reference in your articel to the Toyota having a 2 stroke design that's a 244 CI, that will put out torque values close to a GM 454 CI engine. That's the way it's always been comparing a 2 to a 4.... The reference doesn't mention, however, if the numbers are related to a 454 with Carb or FI. The hand that rocks the cradle rules the world,.... right? (whoever gave birth to the article wrote it how they wanted it to be heard)
 
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Old Jul 11, 2009 | 07:05 PM
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Two words: Rotax E-tec.
 
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Old Jul 11, 2009 | 09:30 PM
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Originally Posted by EastCoastWest
Two words: Rotax E-tec.
Sounds Like Buell ****e.... LOL (no offense intended, only having fun with words,... but aren't Buell motors basically a rotax in the Blast cycles?)
 
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Old Jul 12, 2009 | 06:31 AM
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No idea.... Etec was actually aquired when BRP bought out OMC (Johnson Evinrude), the system was called fitch under OMC...

Buells have 2-strokes?
 
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Old Jul 12, 2009 | 09:01 AM
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Originally Posted by EastCoastWest
No idea.... Etec was actually aquired when BRP bought out OMC (Johnson Evinrude), the system was called fitch under OMC...

Buells have 2-strokes?
Not 2 strokes,... but yes roatx if I remember correctly..... Don't know if they are 2 or 4 stroke..... Haven't played with them,.... just a litttle read a while back.
 
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Old Jul 12, 2009 | 03:12 PM
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Rotax is Based in Austria, they make 2 and 4 stroke engines for their parent company's (Bombardier Rectional Products-BRP) snowmobiles (Ski-Doo), watercraft (Sea-Doo), and atvs (Can-Am), they are very big in the ultralight business, Aprilia and BMW motorcycles use rotax engines as well. I've seen them in everything from portable water pumts to go karts as well. When BRP aquired OMC (Johnson/Evinrude outboard) they eventually adapted the Fitch DI system to work on their 2-stroke Ski-Doo engines, marketed under the E-tec name.
 
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Old Jul 12, 2009 | 05:45 PM
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Sorry guys,... I don't know who builds the Blast engine, but Rotax is said to be building the engine for the Ulysses. My bad on previous post....
 
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Old Jul 13, 2009 | 12:30 PM
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The biggest, most complex and heaviest of the conceptual automotive two-strokes is Toyota’s design. The engine is basically one of the company’s dual-overhead cam, four-stroke engines converted to run a two-stroke cycle. The camshafts run at crankshaft speed and air is delivered to the intake valves through a supercharger. Fuel is added through a high-pressure, direct-injection system. An in-line, six cylinder, 244 cubic-inch version of this engine is said to produce torque equal to GM’s 454 V8.
Two stroke technology has come a long way but I thought the idea of two strokes was also simplicity and if camshafts would be used then some of that simplicity is lost. AKA rotary valve Rotax.
 
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Old Jul 13, 2009 | 05:35 PM
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Another case of our government run amok. It would appear to me that the EPA runs this country. 2 cycle engines have always been more powerful than 4 stroke engines and if not for the EPA more work would have been done with 2 strokes as has been done with 4 strokes, and the result would have been more power yet. Global warming my a$$. I am all for protecting the environment up to a point. Dumping trash and toxic chemicals is one thing, telling everyone that their car, truck, boat, or whatever the latest complaint the "tree huggers" come up with is another. If environmentalists have their way, we will be relegated to walking the trails.
 
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