Just got rid of my 15 year old leaf blower. Something like a 30cc 16/1
mixture 15 year old Craftsman.

Bought a new Poulan 40/1 33 cc blower.

Question is the 2 cycle VS 4 cycle engine. What are the pros vs cons of
both? I realize mixing oil & gas would be a hassle for most car owners but
what other negatives are there for 2 cycle engines?

I have to believe that power to weight ratio is very high for 2 cycle vs 4
cycle. Do 2 cycle engines wear more than 4 cycle?

I guess I'm looking for the science behind these two types and how they lend
themselves to automotive applications.

Thanks, I appreciate the combined knowledge of the group.

 

Brian Foster did pass the time by typing:
> Just got rid of my 15 year old leaf blower. Something like a 30cc 16/1
> mixture 15 year old Craftsman.
>
> Bought a new Poulan 40/1 33 cc blower.
>
> Question is the 2 cycle VS 4 cycle engine. What are the pros vs cons of
> both? I realize mixing oil & gas would be a hassle for most car owners but
> what other negatives are there for 2 cycle engines?
>
> I have to believe that power to weight ratio is very high for 2 cycle vs 4
> cycle. Do 2 cycle engines wear more than 4 cycle?
>
> I guess I'm looking for the science behind these two types and how they lend
> themselves to automotive applications.
>
> Thanks, I appreciate the combined knowledge of the group.

2cycle produce power on each stroke, 4cycle produce power on
each other stroke. For any given cubes a 2 cycle will
outmatch the same sized 4cycle in not only power but power
to weight ratio which is why 2cycles are used in BMX bikes.

2cycle burns oil so they pollute more. Newer engines are
better and there are some very good boat motors out there.

Also in 2cycle plugs foul real quick.

http://science.howstuffworks.com/two-stroke.htm

--
DougW

 

Brian Foster did pass the time by typing:
> Just got rid of my 15 year old leaf blower. Something like a 30cc 16/1
> mixture 15 year old Craftsman.
>
> Bought a new Poulan 40/1 33 cc blower.
>
> Question is the 2 cycle VS 4 cycle engine. What are the pros vs cons of
> both? I realize mixing oil & gas would be a hassle for most car owners but
> what other negatives are there for 2 cycle engines?
>
> I have to believe that power to weight ratio is very high for 2 cycle vs 4
> cycle. Do 2 cycle engines wear more than 4 cycle?
>
> I guess I'm looking for the science behind these two types and how they lend
> themselves to automotive applications.
>
> Thanks, I appreciate the combined knowledge of the group.

2cycle produce power on each stroke, 4cycle produce power on
each other stroke. For any given cubes a 2 cycle will
outmatch the same sized 4cycle in not only power but power
to weight ratio which is why 2cycles are used in BMX bikes.

2cycle burns oil so they pollute more. Newer engines are
better and there are some very good boat motors out there.

Also in 2cycle plugs foul real quick.

http://science.howstuffworks.com/two-stroke.htm

--
DougW

 

Brian Foster did pass the time by typing:
> Just got rid of my 15 year old leaf blower. Something like a 30cc 16/1
> mixture 15 year old Craftsman.
>
> Bought a new Poulan 40/1 33 cc blower.
>
> Question is the 2 cycle VS 4 cycle engine. What are the pros vs cons of
> both? I realize mixing oil & gas would be a hassle for most car owners but
> what other negatives are there for 2 cycle engines?
>
> I have to believe that power to weight ratio is very high for 2 cycle vs 4
> cycle. Do 2 cycle engines wear more than 4 cycle?
>
> I guess I'm looking for the science behind these two types and how they lend
> themselves to automotive applications.
>
> Thanks, I appreciate the combined knowledge of the group.

2cycle produce power on each stroke, 4cycle produce power on
each other stroke. For any given cubes a 2 cycle will
outmatch the same sized 4cycle in not only power but power
to weight ratio which is why 2cycles are used in BMX bikes.

2cycle burns oil so they pollute more. Newer engines are
better and there are some very good boat motors out there.

Also in 2cycle plugs foul real quick.

http://science.howstuffworks.com/two-stroke.htm

--
DougW

 

Brian Foster did pass the time by typing:
> Just got rid of my 15 year old leaf blower. Something like a 30cc 16/1
> mixture 15 year old Craftsman.
>
> Bought a new Poulan 40/1 33 cc blower.
>
> Question is the 2 cycle VS 4 cycle engine. What are the pros vs cons of
> both? I realize mixing oil & gas would be a hassle for most car owners but
> what other negatives are there for 2 cycle engines?
>
> I have to believe that power to weight ratio is very high for 2 cycle vs 4
> cycle. Do 2 cycle engines wear more than 4 cycle?
>
> I guess I'm looking for the science behind these two types and how they lend
> themselves to automotive applications.
>
> Thanks, I appreciate the combined knowledge of the group.

2cycle produce power on each stroke, 4cycle produce power on
each other stroke. For any given cubes a 2 cycle will
outmatch the same sized 4cycle in not only power but power
to weight ratio which is why 2cycles are used in BMX bikes.

2cycle burns oil so they pollute more. Newer engines are
better and there are some very good boat motors out there.

Also in 2cycle plugs foul real quick.

http://science.howstuffworks.com/two-stroke.htm

--
DougW

 

Emissions primarily ; 2 stroke engines are more dirty as some of the oil put
in for lubrication gets burnt. However, they tend to be higher output as
they can fire twice as often. Don't know about wear ; would guess that 2
strokes would wear faster, both because of the oil and also because of the
output.

Dave Milne, Scotland
'91 Grand Wagoneer, '99 TJ

"Brian Foster" <brianfoster@houston.rr.com> wrote in message
news:FZjte.46691$j51.34409@tornado.texas.rr.com...
> Just got rid of my 15 year old leaf blower. Something like a 30cc 16/1
> mixture 15 year old Craftsman.
>
> Bought a new Poulan 40/1 33 cc blower.
>
> Question is the 2 cycle VS 4 cycle engine. What are the pros vs cons of
> both? I realize mixing oil & gas would be a hassle for most car owners but
> what other negatives are there for 2 cycle engines?
>
> I have to believe that power to weight ratio is very high for 2 cycle vs 4
> cycle. Do 2 cycle engines wear more than 4 cycle?
>
> I guess I'm looking for the science behind these two types and how they
lend
> themselves to automotive applications.
>
> Thanks, I appreciate the combined knowledge of the group.

 

Emissions primarily ; 2 stroke engines are more dirty as some of the oil put
in for lubrication gets burnt. However, they tend to be higher output as
they can fire twice as often. Don't know about wear ; would guess that 2
strokes would wear faster, both because of the oil and also because of the
output.

Dave Milne, Scotland
'91 Grand Wagoneer, '99 TJ

"Brian Foster" <brianfoster@houston.rr.com> wrote in message
news:FZjte.46691$j51.34409@tornado.texas.rr.com...
> Just got rid of my 15 year old leaf blower. Something like a 30cc 16/1
> mixture 15 year old Craftsman.
>
> Bought a new Poulan 40/1 33 cc blower.
>
> Question is the 2 cycle VS 4 cycle engine. What are the pros vs cons of
> both? I realize mixing oil & gas would be a hassle for most car owners but
> what other negatives are there for 2 cycle engines?
>
> I have to believe that power to weight ratio is very high for 2 cycle vs 4
> cycle. Do 2 cycle engines wear more than 4 cycle?
>
> I guess I'm looking for the science behind these two types and how they
lend
> themselves to automotive applications.
>
> Thanks, I appreciate the combined knowledge of the group.

 

Emissions primarily ; 2 stroke engines are more dirty as some of the oil put
in for lubrication gets burnt. However, they tend to be higher output as
they can fire twice as often. Don't know about wear ; would guess that 2
strokes would wear faster, both because of the oil and also because of the
output.

Dave Milne, Scotland
'91 Grand Wagoneer, '99 TJ

"Brian Foster" <brianfoster@houston.rr.com> wrote in message
news:FZjte.46691$j51.34409@tornado.texas.rr.com...
> Just got rid of my 15 year old leaf blower. Something like a 30cc 16/1
> mixture 15 year old Craftsman.
>
> Bought a new Poulan 40/1 33 cc blower.
>
> Question is the 2 cycle VS 4 cycle engine. What are the pros vs cons of
> both? I realize mixing oil & gas would be a hassle for most car owners but
> what other negatives are there for 2 cycle engines?
>
> I have to believe that power to weight ratio is very high for 2 cycle vs 4
> cycle. Do 2 cycle engines wear more than 4 cycle?
>
> I guess I'm looking for the science behind these two types and how they
lend
> themselves to automotive applications.
>
> Thanks, I appreciate the combined knowledge of the group.

 

Emissions primarily ; 2 stroke engines are more dirty as some of the oil put
in for lubrication gets burnt. However, they tend to be higher output as
they can fire twice as often. Don't know about wear ; would guess that 2
strokes would wear faster, both because of the oil and also because of the
output.

Dave Milne, Scotland
'91 Grand Wagoneer, '99 TJ

"Brian Foster" <brianfoster@houston.rr.com> wrote in message
news:FZjte.46691$j51.34409@tornado.texas.rr.com...
> Just got rid of my 15 year old leaf blower. Something like a 30cc 16/1
> mixture 15 year old Craftsman.
>
> Bought a new Poulan 40/1 33 cc blower.
>
> Question is the 2 cycle VS 4 cycle engine. What are the pros vs cons of
> both? I realize mixing oil & gas would be a hassle for most car owners but
> what other negatives are there for 2 cycle engines?
>
> I have to believe that power to weight ratio is very high for 2 cycle vs 4
> cycle. Do 2 cycle engines wear more than 4 cycle?
>
> I guess I'm looking for the science behind these two types and how they
lend
> themselves to automotive applications.
>
> Thanks, I appreciate the combined knowledge of the group.

 

Two cycles are too dirty, and use way more fuel, even then in
bigger engines you need a way for them to breath, needing both turbo and
super chargers, and four valves per cylinder like the 1947 Detroit 6-71
still being used in diesel trucks with twelve cylinders, 92 cubic inches
per cylinder: http://blakeboatworks.com/janbill.jpg
God Bless America, ßill O|||||||O
mailto:-------------------- http://www.----------.com/

Brian Foster wrote:
>
> Just got rid of my 15 year old leaf blower. Something like a 30cc 16/1
> mixture 15 year old Craftsman.
>
> Bought a new Poulan 40/1 33 cc blower.
>
> Question is the 2 cycle VS 4 cycle engine. What are the pros vs cons of
> both? I realize mixing oil & gas would be a hassle for most car owners but
> what other negatives are there for 2 cycle engines?
>
> I have to believe that power to weight ratio is very high for 2 cycle vs 4
> cycle. Do 2 cycle engines wear more than 4 cycle?
>
> I guess I'm looking for the science behind these two types and how they lend
> themselves to automotive applications.
>
> Thanks, I appreciate the combined knowledge of the group.