JLO/ILO ROCKWELL MODEL L77L 2 STROKE PROJECT

kevjhnsn wrote:thanks stu
its a weired carb it goes from tickover about 750 rpm to 2-3000 rpm and then the other throttle to air vaine govenor takes it up to 4500-5000rpm
it screams at you like when you stand on a cats tail lol
thanks kev

Kev do you not think all 2 strokes are like that, even with a hand contol fitted they still rev freely, that's why I think alot are just ran flat out when working.

Stu.h

Two strokes need a little load really to get them to "two stroke" correctly, otherwise they just flood the sump, as my Scott will hence I got the dynamo sorted, the only engine I have thats ok on as close to tick over as it can get is a Villiers WX11.

Petter M's will also kind of Idle, but need a tap on the sump really to clear up the build up of dirty fuel.

Cheers Steve

Skankin_giant wrote:Two strokes need a little load really to get them to "two stroke" correctly, otherwise they just flood the sump, as my Scott will hence I got the dynamo sorted, the only engine I have thats ok on as close to tick over as it can get is a Villiers WX11.

Petter M's will also kind of Idle, but need a tap on the sump really to clear up the build up of dirty fuel.

Cheers Steve

the villiers midget has a plug in the sump also for the dirty fuel oil
thanks kev

stationary stu wrote:

kevjhnsn wrote:thanks stu
its a weired carb it goes from tickover about 750 rpm to 2-3000 rpm and then the other throttle to air vaine govenor takes it up to 4500-5000rpm
it screams at you like when you stand on a cats tail lol
thanks kev

Kev do you not think all 2 strokes are like that, even with a hand contol fitted they still rev freely, that's why I think alot are just ran flat out when working.

Stu.h

hi there stu
ive never had a 2 stroke in my life before so are all new to me
but i see what you mean with no valves , camshaft ect to control the ins and outs of fuel and exhurst like a four stroke
thanks kev

Im pretty sure the ILO is a typical ported 2 stroke, so they have a stepped piston to direct the fuel air mix and exhaust gasses.
They rely heavily on Crank Crase and combustion chamber pressure to move the mixture of gasses around, the crank case compression is as important as combustion chamber compression, needs to be a good seal as the vacuum of the piston rising draws the fuel/oil air mixture around the sump coating the crank, crank case and bearing in petroil mixture, then the pressure as the piston drops pushes it back to the top of the combustion chamber.
When the exhaust port it uncovered the change is pressure helps remove the old gases.

Hope that makes sense.

Cheers Steve

nice one
and its in terms that i can even understand
there simple and effective but the fuel consuption must be higher than a eqivalate size 4stroke
but the 2 stroke must give better hp to size then I BE THINKING ?????
thanks steve

yes and no, a 4 stroke has more torque, 2 stroke rely more on RPM to produce power, take my Scott SE, at 500rpm its 1hp at 2000 5 1/2hp, all this in a engine smaller then a Petter A.
Oh yea 2 strokes can drink alright! smaller ones are normally ok, my scott will use 2 gallons in a day

Cheers Steve

hi steve
i do like the scotts you have they have a charming style to them
i thought they were 4 strokes SORRY
anyone have an idea of the fuel consumption of a villiers midget of load low revs per rally day
THANKS KEV
and or on load and higher revs
thanks kev

Skankin_giant wrote:yes and no, a 4 stroke has more torque, 2 stroke rely more on RPM to produce power, take my Scott SE, at 500rpm its 1hp at 2000 5 1/2hp, all this in a engine smaller then a Petter A.
Oh yea 2 strokes can drink alright! smaller ones are normally ok, my scott will use 2 gallons in a day

Cheers Steve

Wow can that drink @ £5 + a gallon not cheap to take away for the weekend. Makes sense now there's not as many 2 strokes about.

Kev have a look on you tube at the trucks with the diesel two stokes in and see how high they rev, you think they'll got BANG at any time

http://www.youtube.com/watch?v=mfKmkitnqQY

I've only ever once had a two stroke diesel in bits and that was at college so it was never started to see if it ran. It was also a Commer TS3 with a Roots blower (like a super charger). Very strange to see the ports in the cylinder liner for the induction/exhaust.

Stu.

stationary stu wrote:

Wow can that drink @ £5 + a gallon not cheap to take away for the weekend. Makes sense now there's not as many 2 strokes about.

Stu.

Might be a bit better when running load so it doesn't fart and pop about and fill the sump.
There still a fair amount of two strokes, loads of petter m's about, my old one of them used to drink a gallon a day! the wx11 used to be ok would get through half a gallon.
The small stuff like Marvils and Midgets should be ok on half a gallon.

My old Petter M appeared on Ebay a few months back....and boy do I want it back! I would have another tomorrow.



Cheers Steve

That's always the way Steve but you've got some good engines now and I'm sure we would all like to keep all our engines but money and space plays a big part in what we have. Saying that I've never sold an engine yet and I need to and I'm not looking forward to it.

Stu.