Thread: 2 stroke ain't dead yet....

I read somewhere recently that two strokes are starting to make a comeback in trail bike riding.

I have a V6 two stroke hanging off the back of my ski boat and I don't see two stroke outboards disappearing for a long time yet.

Personally I love two stroke engines. Nothing smells better than when the big Merc is fired up and I get a whiff of the exhaust.

Dave.

now thats clever, very very clever.

I like the electrically assisted turbo....

I can see that developing into a dynamo or generator... spin it up with electricery to start the engine then when its running it charges the battery.

That is a brilliant concept I hope they can keep it going.
Question?????? Do any of you out there know why the rotory engine from mazda was stopped from being built.??????
It was an almost unbrakable engine and sounded awsome with the right gear on it.
Cheers Nev.

Originally Posted by Blue Bandit

That is a brilliant concept I hope they can keep it going.
Question?????? Do any of you out there know why the rotory engine from mazda was stopped from being built.??????
It was an almost unbrakable engine and sounded awsome with the right gear on it.
Cheers Nev.

Mazda still make a rotary; it's in their RX8. I wouldn't go as far as saying it was unbreakable. I did the apex seals in my RX7 at around 150,000km.

You try and buy a outboard. Sure there are 4 strokes, but the direct injection 2 strokes are really putting up a strong case. They don't use much (if any) more fuel than the big 4 strokes, they are lighter, and have a fraction of the maintenance requirements. Also, they use hardly any oil. In the case of the e-tec - they can actually run without oil for many hours at reduced power settings.

Originally Posted by Blknight.aus

now thats clever, very very clever.

I like the electrically assisted turbo....

I can see that developing into a dynamo or generator... spin it up with electricery to start the engine then when its running it charges the battery.

One of the early model Hondas (Scamp, Zot??) had a starter/generator as a single unit. Other manufacurers have used the same idea.

Originally Posted by Blue Bandit

That is a brilliant concept I hope they can keep it going.
Question?????? Do any of you out there know why the rotory engine from mazda was stopped from being built.??????
It was an almost unbrakable engine and sounded awsome with the right gear on it.
Cheers Nev.

It is still available, not hugely popular due mainly to reliability issues and high fuel consumption.

Originally Posted by Captain_Rightfoot

You try and buy a outboard. Sure there are 4 strokes, but the direct injection 2 strokes are really putting up a strong case. They don't use much (if any) more fuel than the big 4 strokes, they are lighter, and have a fraction of the maintenance requirements. Also, they use hardly any oil. In the case of the e-tec - they can actually run without oil for many hours at reduced power settings.

Why not build two strokes with a proper lubrication system, thus eliminating the requirement to add lube oil to the fuel? GM were doing so over fifty years ago. Consider the 53, 71 and 82 Series Detroits.

Originally Posted by V8Ian

One of the early model Hondas (Scamp, Zot??) had a starter/generator as a single unit. Other manufacturers have used the same idea.
.. ... .. ... .. .... .... ... ....

The Haflinger had one.

Long live the 2 stroke! In a conventional 2 stroke the crankcase is where the induction takes place and a sump therefore isn't possible. Detroits have blowers and intake valves so are a different kettle of fish. No problems with oil delivery on angles offroad in a conventional 2 stroke which makes for a lot of fun. My LJ50 was idling happily in this shot.