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TimJ 
Senior member
Joined: 05 Sep 2008
Location: Cape Town
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Posts: 396
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 Quote  Reply
 Topic: 2 Strokes of the future - build it yourself
Posted: 05 May 2010 at 3:59pm |
Here's a VERY interesting read
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Hi, my name's Tim and I'm a
BIKEAHOLIC
2010 GasGas Pro300 in garage with 09 EC 250
Ama One Tya
How to lower your carbon foot-print. Keep your feet on the pegs!
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brains
Post Junkie
Badass on a Gas Gas!
Joined: 22 Sep 2007
Location: Hillcrest - KZN
Online Status: Offline
Posts: 2204
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Quote Reply
Posted: 13 Jul 2010 at 6:11pm |
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Nice read
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Only a Biker knows why a dog sticks his head out of a car window.
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Piston-Slap
Groupie
Joined: 08 Jul 2010
Location: South Africa
Online Status: Offline
Posts: 26
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Quote Reply
Posted: 13 Jul 2010 at 6:29pm |
All well about feul efficiency with DFI etc, but I think the main issue with the 2-stroke is the total-waste oil thing, mix, burn with fuel and out the pipe.
However, somebody very well known here in racing circle's, one of our legends actually has designed a "smokeless" 2-stroke engine which a V-twin prototype is being built right now.
The lubrication is not pre-mix, autolube or such but fed via the crankcase up through the conrod and out via piston glands, something like that.
Anyone aware of this development, which a Suzuki is being used for as a prototype ?
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S U Z U K I
Vintage = PE175, PE250, PE400,
Younger = TS200X, DR200, DR600
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Slowpoke
Post Junkie
I poke....slowly
Joined: 21 Sep 2007
Location: Mossel Bay
Online Status: Offline
Posts: 1247
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Quote Reply
Posted: 29 Jul 2010 at 11:53pm |
Interesting, but IMO we've been hearing about the future of the new breed 2T for so long now that the future is now in the past. 
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Reliability comes from maintenance!
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Malduister
Senior member
Joined: 24 Mar 2008
Location: on the bike
Online Status: Offline
Posts: 497
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Quote Reply
Posted: 30 Jul 2010 at 12:54am |
All the 4T guru's are kaking themselves for that day, as it will be the end for them...
VIVA 2 STROKE |
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There are only two four letter words that are offensive to me - don't and stop...unless they are used together
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backmarker
Post Junkie
Yippie Kai Yay...MF!
Joined: 17 Jun 2008
Location: Gauteng
Online Status: Offline
Posts: 2056
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Quote Reply
Posted: 13 Aug 2010 at 6:28pm |
Outboards have used this technologly for years, why can they replicate this to scoots?
maybe industry will be badly effected seeing the majority of the scoots being built out of japan are 4t?
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Piston-Slap
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Joined: 08 Jul 2010
Location: South Africa
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Posts: 26
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Quote Reply
Posted: 14 Aug 2010 at 1:35pm |
I don't think this has been done before, it's being tried out using a V-twin 800 Suzuki motor. That was dyno'd and all that as a 4-stroke now it's just a bit of wait till the re-arranged internals of this 800, as a 2-stroke will skop-gat.
But, SMOKELESS, no pre-mix or total waste oiling set-up. Oil is fed from the bottom up. The "Vintage" okes will aslo know the person behind it, now lives in Aus but the engine is being built in Cape Town by another name in the car-thing.
The idea is to "replace" a 4-stroke engine of similar power with a smaller, equal power and far less moving parts. For various applications, could be the outbaord route, small people-mover cars etc.
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S U Z U K I
Vintage = PE175, PE250, PE400,
Younger = TS200X, DR200, DR600
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Piston-Slap
Groupie
Joined: 08 Jul 2010
Location: South Africa
Online Status: Offline
Posts: 26
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Quote Reply
Posted: 14 Aug 2010 at 1:42pm |
Traditional 2-T also were fed bottom up but mixed with the fuel, which then pissed out as oil vapour with the fuel fumes through the pipe.
Initially the oil feed was up via the crank, through the conrod and out by piston glands.
In other words the fuel and oil don't mix to lubricate. The fueling is managed by fuel injection clean not mixed with 2-T oil. Something like that.
They already built a single cyl prototype the V-twin is a bit more complicated and if successfull can be applied in the same principle I would imaging with added pots.
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S U Z U K I
Vintage = PE175, PE250, PE400,
Younger = TS200X, DR200, DR600
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Expedite
Senior member
Joined: 01 Oct 2007
Location: Bryanston
Online Status: Offline
Posts: 355
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Quote Reply
Posted: 20 Aug 2010 at 10:20am |
I like this part..
In 1936, work started on the development of a very highly rated, two-cycle gasoline-injected, sleeve-valve petrol engine for aircraft propulsion... . Toward the end of the programme [1945], short-duration tests were successfully carried out at 354 BMEP at 4000 rpm...". That was a single-cylinder engine of 1639-cc (5-inch bore) and those numbers give 358-hp. (Quote from the autobiography of Sir Harry Ricardo.) Try to imagine something like a Dodge Ram pickup powered by a neat, little twin-cylinder, two-stroke engine, conservatively rated at 400-hp. I'm referring to an engine that was running in the 1930s!
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01' CR500 AF
04' CR250 R
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TimJ
Senior member
Joined: 05 Sep 2008
Location: Cape Town
Online Status: Offline
Posts: 396
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Quote Reply
Posted: 20 Aug 2010 at 1:16pm |
single cylinder 1650cc 2-stroke - 358 hp! The ultimate hill-climb motor 
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Hi, my name's Tim and I'm a
BIKEAHOLIC
2010 GasGas Pro300 in garage with 09 EC 250
Ama One Tya
How to lower your carbon foot-print. Keep your feet on the pegs!
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