Kamikza
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| posted on 9/11/06 at 04:25 PM |
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conwerting two stroke
Is ist posible to conwert two strok 50 cc petrol to two stroke 50 cc diesel ?? How is saw sthat the model plain engen you yust put hiter insted the
spark and it works ????true or fals
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smart51
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| posted on 9/11/06 at 04:30 PM |
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You would need to raise the compression ratio quite a lot. You would also need fuel injection for diesel, not a carburettor. You don't need a
spark plug but you might be able to fit a glow plug in the same hole.
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02GF74
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| posted on 9/11/06 at 04:31 PM |
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quote:
Originally posted by Kamikza
Is ist posible to conwert two strok 50 cc petrol to two stroke 50 cc diesel ?? How is saw sthat the model plain engen you yust put hiter insted the
spark and it works ????true or fals
plain model engines are not same as diesel - they have a glow plug - basically some fancy wire that is very hot that is equivalent of the spark in 4
stroke.
Diesels work by compressing the gas so that is gets so hot that any fuel squirted in ignites.
Now diesels do have glow plugs too that are used when starting when the engines is cold; plus they also (old land rovers anywya) have a hot spot -
some metal disc that helps combustion - at whcih point my knowledge of diesels come to an abrupt end.
So don't know if what you are asking is possible.
The US army are running diesel motorbikes - not sure if 4 or 2 stroke.
[Edited on 9/11/06 by 02GF74]
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Kamikza
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| posted on 9/11/06 at 04:37 PM |
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i whas tinking to conwert a 50 cc skuter tipe engen but then i nid a bosch pump to inject the tiesel an no way to get hier compresion ?Tanks any way
 I sad two stoke so no injectors how il i fitit
[Edited on 9/11/06 by Kamikza]
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Kamikza
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| posted on 9/11/06 at 04:41 PM |
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this is gasoline two stroke
 
Rescued attachment 789036670.jpg
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Kamikza
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| posted on 9/11/06 at 04:43 PM |
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and this two stroke diesel wher can i get the pump can i use the pump that sprays water on the windsheld?? and how to put it
 
Rescued attachment 2848177971.jpg
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NS Dev
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| posted on 9/11/06 at 04:56 PM |
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you won't burn diesel in it, simple fact it will self destruct at the compression ratio required....
however, you could (not that you would want to!!!) burn alcohol/nitro mix in it with no spark plug if you raised the compression a bit and put a
decompressor screw on it plus a blowtorch on the head when starting..............
WHY?????????
Retro RWD is the way forward...........automotive fabrication, car restoration, sheetmetal work, engine conversion
retro car restoration and tuning
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mookaloid
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| posted on 9/11/06 at 05:18 PM |
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quote:
Originally posted by Kamikza
and this two stroke diesel wher can i get the pump can i use the pump that sprays water on the windsheld?? and how to put it
I would think a screen washer pump would do nicely to pump diesel in
ROFL
and as NS Dev says it would just explode if you raised the CR enough - diesel engines are made a lot stronger than petrol ones to stop them blowing
up.
"That thing you're thinking - it wont be that."
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viatron
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| posted on 9/11/06 at 05:42 PM |
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I think you would need injectors and a timed pump, doesnt the pump in a diesel also act as the limiter, as i understand it, without a limiter a diesel
can rev itself to destruction almost straight away, may be wrong though......
Mac
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NS Dev
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| posted on 9/11/06 at 05:50 PM |
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it does, but you can throttle a diesel instead, but its not the best way to control it.
Just think of a diesel engine as a petrol with severe pinking, explains it the easiest!
Retro RWD is the way forward...........automotive fabrication, car restoration, sheetmetal work, engine conversion
retro car restoration and tuning
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Kissy
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| posted on 9/11/06 at 06:27 PM |
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You used to be able to get actual diesel engines for model planes, and yes they had carbs - very basic and cheeeeap.
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NS Dev
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| posted on 9/11/06 at 07:15 PM |
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didn't run on diesel tho, burnt methanol and nitro, just had no plug or glowplug, just a comp screw
Retro RWD is the way forward...........automotive fabrication, car restoration, sheetmetal work, engine conversion
retro car restoration and tuning
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gazza285
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| posted on 9/11/06 at 08:12 PM |
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Yes, it has been done. At this years Shell Ecomarathon one competitor, from Denmark I think, ran a converted Puch two stroke engine on diesel. The
diesel was injected, using a standard type injector fitted into the spark plug hole, but it was a measured and timed pulse as per a normal direct
injection setup (only twice as fast obviously).
DO NOT PUT ON KNOB OR BOLLOCKS!
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akumabito
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| posted on 9/11/06 at 08:56 PM |
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While on the subject of converting engines...
How come you can not run a diesel engine on petrol? The fuel isn't injected until the highest compression is reached anyway, right? So there
should be no pinking? And how come there's no high-revving diesels? Surely you can make an oversquare design with a high CR?
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Jebus
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| posted on 9/11/06 at 09:01 PM |
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because of the high compression ratio, the petrol would not want to coperate! plus the massive compresion needed for a diesal means it needs a long
stroke and chunky componats these are heavy so it wont want to rev
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ed_crouch
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| posted on 9/11/06 at 09:03 PM |
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Diesels have a long stroke to get the torque, and high RPMs would mean that the piston accelerations would be flipping high, and would probably
overload the big ends.
Also, Diesel doesnt burn that quick compared to petrol.
Also, burning petrol in a 20:1 compression engine would blow the f***in' cylinder head to mars!
Ed.
I-iii-iii-iii-ts ME!
Hurrah.
www.wings-and-wheels.net
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MikeRJ
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| posted on 10/11/06 at 12:45 AM |
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quote:
Originally posted by ed_crouch
Diesels have a long stroke to get the torque
The torque comes from the very high compression, and the extra energy in diesel compared to petrol. Stroke has relatively little effect on torque for
a given capacity engine, as the increase in area of the piston as the stroke gets shorter balances it out perfectly, in theory at least.
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Kamikza
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| posted on 10/11/06 at 10:29 AM |
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what is pinking? And can you find the puch page and im tinking of conwerting two stroke tomos or pocket bike engen.
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gazza285
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| posted on 10/11/06 at 05:28 PM |
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I don't know if there was a web page, I was looking at the car in the flesh.
DO NOT PUT ON KNOB OR BOLLOCKS!
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