Posted by user on August 13, 2009, 2:09 pm
News wrote:
>
>> News wrote:
>>>
>>>
>>>> And often end up with one that ALSO needed the chain replaced. I used
>>>> to replace them as a precaution whenever I replaced one of the engines
>>>> that was prone to fail - with an aftermarket chain set that was
>>>> proven to outlast the OEM significantly.
>>>
>>> Chains stretched far more than timing belts, one of the reasons why
>>> they went to belts. When they stretched the timing went out. I
>>> replaced my timing belt and the engine was noticeable faster and
>>> smoother as the timing tightened up. Best to have two-stroke engines
>>> with no valves or belts. :) Two-stroke units are best used as range
>>> extenders on the likes of the Chevy Volt running at constant speed.
>>> Very smooth.
>>
>> Two strokes are filthy engines.
>
> Modern two-strokes with direct injection are not at all. Look at the
> Bourke engine:
> http://en.wikipedia.org/wiki/Bourke_engine
> http://www.bourke-engine.com/vlb/
>
>
Most don't pass the current acceptable levels, which is why most
vehicles that used to use them such as scooters now use four stoke
engines.
Posted by News on August 13, 2009, 2:44 pm
> News wrote:
>>
>>> News wrote:
>>>>
>>>>
>>>>> And often end up with one that ALSO needed the chain replaced. I used
>>>>> to replace them as a precaution whenever I replaced one of the engines
>>>>> that was prone to fail - with an aftermarket chain set that was
>>>>> proven to outlast the OEM significantly.
>>>>
>>>> Chains stretched far more than timing belts, one of the reasons why
>>>> they went to belts. When they stretched the timing went out. I
>>>> replaced my timing belt and the engine was noticeable faster and
>>>> smoother as the timing tightened up. Best to have two-stroke engines
>>>> with no valves or belts. :) Two-stroke units are best used as range
>>>> extenders on the likes of the Chevy Volt running at constant speed.
>>>> Very smooth.
>>>
>>> Two strokes are filthy engines.
>>
>> Modern two-strokes with direct injection are not at all. Look at the
>> Bourke engine:
>> http://en.wikipedia.org/wiki/Bourke_engine
>> http://www.bourke-engine.com/vlb/
> Most don't pass the current acceptable levels, which is why most vehicles
> that used to use them such as scooters now use four stoke
> engines.
Orbital, Chrysler and others used direct injection and reached emission
levels. Chrysler had a normal wet crank - about 20 years ago!!!!.
http://www.allpar.com/neon/stroke.html
Chrysler went against the engine because of the screaming scooter/lawn mower
image, as you demonstrated. Their engines were very quiet and smooth and
revved to 10,000 without any problems. All a two-stroke is, is an engine
that every downward stroke is a power stoke, as opposed to every other stoke
a power stroke in 4 -stroke. There are many ways to achieve that. The
largest piston engines in the world are two-stroke diesels.
Posted by harry on August 13, 2009, 6:24 pm
> > News wrote:
> >>> News wrote:
> >>>>> And often end up with one that ALSO needed the chain replaced. I used
> >>>>> to replace them as a precaution whenever I replaced one of the engines
> >>>>> that was prone to fail - with an aftermarket chain set that was
> >>>>> proven to outlast the OEM significantly.
> >>>> Chains stretched far more than timing belts, one of the reasons why
> >>>> they went to belts. When they stretched the timing went out. I
> >>>> replaced my timing belt and the engine was noticeable faster and
> >>>> smoother as the timing tightened up. Best to have two-stroke engines
> >>>> with no valves or belts. :) Two-stroke units are best used as range
> >>>> extenders on the likes of the Chevy Volt running at constant speed.
> >>>> Very smooth.
> >>> Two strokes are filthy engines.
> >> Modern two-strokes with direct injection are not at all. Look at the
> >> Bourke engine:
> >>http://en.wikipedia.org/wiki/Bourke_engine
> >>http://www.bourke-engine.com/vlb/
> > Most don't pass the current acceptable levels, which is why most vehicles
> > that used to use them such as scooters now use four stoke
> > engines.
> Orbital, Chrysler and others used direct injection and reached emission
> levels. Chrysler had a normal wet crank - about 20 years
ago!!!!.http://www.allpar.com/neon/stroke.html
> Chrysler went against the engine because of the screaming scooter/lawn mower
> image, as you demonstrated. Their engines were very quiet and smooth and
> revved to 10,000 without any problems. All a two-stroke is, is an engine
> that every downward stroke is a power stoke, as opposed to every other stoke
> a power stroke in 4 -stroke. There are many ways to achieve that. The
> largest piston engines in the world are two-stroke diesels.
Correct. Pulitzer. However they have a piston rod and crosshead
similar to a steam engine. They rev very slow. The reverse side of the
piston takes the place of the crankcase & transfer port in the
conventional 2T engine. Crankshaft has "conventional lubrication"
actually from a separately powered oil pump which is started before
the main engine is run (hence virtually no wear on the engine at all)
This overcomes all the lubrication problems, no oil is mixed with the
fuel or burns with the fuel.
Extremely heavy engines but as they are marine engines it doesn't
matter.
They have the added advantage that they can run equally well in either
direction
Posted by News on August 13, 2009, 9:40 pm
>> > News wrote:
>>
>> >>> News wrote:
>>
>>
>> >>>>> And often end up with one that ALSO needed the chain replaced. I
>> >>>>> used
>> >>>>> to replace them as a precaution whenever I replaced one of the
>> >>>>> engines
>> >>>>> that was prone to fail - with an aftermarket chain set that was
>> >>>>> proven to outlast the OEM significantly.
>>
>> >>>> Chains stretched far more than timing belts, one of the reasons why
>> >>>> they went to belts. When they stretched the timing went out. I
>> >>>> replaced my timing belt and the engine was noticeable faster and
>> >>>> smoother as the timing tightened up. Best to have two-stroke
>> >>>> engines
>> >>>> with no valves or belts. :) Two-stroke units are best used as range
>> >>>> extenders on the likes of the Chevy Volt running at constant speed.
>> >>>> Very smooth.
>>
>> >>> Two strokes are filthy engines.
>>
>> >> Modern two-strokes with direct injection are not at all. Look at the
>> >> Bourke engine:
>> >>http://en.wikipedia.org/wiki/Bourke_engine
>> >>http://www.bourke-engine.com/vlb/
>>
>> > Most don't pass the current acceptable levels, which is why most
>> > vehicles
>> > that used to use them such as scooters now use four stoke
>> > engines.
>>
>> Orbital, Chrysler and others used direct injection and reached emission
>> levels. Chrysler had a normal wet crank - about 20 years
>> ago!!!!.http://www.allpar.com/neon/stroke.html
>> Chrysler went against the engine because of the screaming scooter/lawn
>> mower
>> image, as you demonstrated. Their engines were very quiet and smooth and
>> revved to 10,000 without any problems. All a two-stroke is, is an engine
>> that every downward stroke is a power stoke, as opposed to every other
>> stoke
>> a power stroke in 4 -stroke. There are many ways to achieve that. The
>> largest piston engines in the world are two-stroke diesels.
> Correct. Pulitzer.
Wartsila-Sulzer
http://people.bath.ac.uk/ccsshb/12cyl/
Posted by clare on August 14, 2009, 1:59 am
On Thu, 13 Aug 2009 11:24:41 -0700 (PDT), harry
>> > News wrote:
>>
>> >>> News wrote:
>>
>>
>> >>>>> And often end up with one that ALSO needed the chain replaced. I used
>> >>>>> to replace them as a precaution whenever I replaced one of the engines
>> >>>>> that was prone to fail - with an aftermarket chain set that was
>> >>>>> proven to outlast the OEM significantly.
>>
>> >>>> Chains stretched far more than timing belts, one of the reasons why
>> >>>> they went to belts. When they stretched the timing went out. I
>> >>>> replaced my timing belt and the engine was noticeable faster and
>> >>>> smoother as the timing tightened up. Best to have two-stroke engines
>> >>>> with no valves or belts. :) Two-stroke units are best used as range
>> >>>> extenders on the likes of the Chevy Volt running at constant speed.
>> >>>> Very smooth.
>>
>> >>> Two strokes are filthy engines.
>>
>> >> Modern two-strokes with direct injection are not at all. Look at the
>> >> Bourke engine:
>> >>http://en.wikipedia.org/wiki/Bourke_engine
>> >>http://www.bourke-engine.com/vlb/
>>
>> > Most don't pass the current acceptable levels, which is why most vehicles
>> > that used to use them such as scooters now use four stoke
>> > engines.
>>
>> Orbital, Chrysler and others used direct injection and reached emission
>> levels. Chrysler had a normal wet crank - about 20 years
ago!!!!.http://www.allpar.com/neon/stroke.html
>> Chrysler went against the engine because of the screaming scooter/lawn mower
>> image, as you demonstrated. Their engines were very quiet and smooth and
>> revved to 10,000 without any problems. All a two-stroke is, is an engine
>> that every downward stroke is a power stoke, as opposed to every other stoke
>> a power stroke in 4 -stroke. There are many ways to achieve that. The
>> largest piston engines in the world are two-stroke diesels.
>Correct. Pulitzer. However they have a piston rod and crosshead
>similar to a steam engine. They rev very slow. The reverse side of the
>piston takes the place of the crankcase & transfer port in the
>conventional 2T engine. Crankshaft has "conventional lubrication"
>actually from a separately powered oil pump which is started before
>the main engine is run (hence virtually no wear on the engine at all)
>This overcomes all the lubrication problems, no oil is mixed with the
>fuel or burns with the fuel.
>Extremely heavy engines but as they are marine engines it doesn't
>matter.
>They have the added advantage that they can run equally well in either
>direction
All the old "jimmy" diesels were 2 strokers too. 3-71, 6-71, 8-71
etc. All with belt driven blowers - and I believe some also turbo
compounded.
XML site map
>> News wrote:
>>>
>>>
>>>> And often end up with one that ALSO needed the chain replaced. I used
>>>> to replace them as a precaution whenever I replaced one of the engines
>>>> that was prone to fail - with an aftermarket chain set that was
>>>> proven to outlast the OEM significantly.
>>>
>>> Chains stretched far more than timing belts, one of the reasons why
>>> they went to belts. When they stretched the timing went out. I
>>> replaced my timing belt and the engine was noticeable faster and
>>> smoother as the timing tightened up. Best to have two-stroke engines
>>> with no valves or belts. :) Two-stroke units are best used as range
>>> extenders on the likes of the Chevy Volt running at constant speed.
>>> Very smooth.
>>
>> Two strokes are filthy engines.
>
> Modern two-strokes with direct injection are not at all. Look at the
> Bourke engine:
> http://en.wikipedia.org/wiki/Bourke_engine
> http://www.bourke-engine.com/vlb/
>
>