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Discussion Starter · #1 ·



Does anyone know anything about this little sucker? I saw it on eBay a couple of weeks ago it went for around $200US. I wonder if there are any in Australia??


What are your thoughts on this product guys?? It sure does look interesting.
 

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Weaponx,


I have seen these raised in a number of forums before and there are differing views. My view, and I think it is in line with the more common view, is that they nothing more than a "SuperLeaner".


If you think about what a Supercharger actually does - it forces additional air into the engine. What's the problem with this in a glow engine context....


You would have to substantially richen your mix for starters, otherwise you will get increases in power, due to the mix being lean, and you engine life is dramatically reduced.


So once you have richened the mix, what next - think about the engineering of a glow engine..... no valves, so how do you compress additional fuel / air mix into the cylinder. At somepoint that the input ports are open, sois the exhaust port, so while you may get a small amount of additional mix into the cylinder, alot of it is going to go straight out the exhaust unburnt.


With specialised porting andspecialised exhaust design, could you maximise scavenging and make better use of the additional mix flowing through the engine? Maybe... but I am doubtful.


My two bits worth.


Regards,


AUSRC
 

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AUSRC said:
If you think about what a Supercharger actually does - it forces additional air into the engine. What's the problem with this in a glow engine context....

Actually no... the RC supercharger thingy bolts to the carb, just after the air filter. So it is pressurising the entire air intake before the fuel inlet venturi; more air flowing past the venturi means more fuel gets sucked out and mixed.


In short, the crankcase is pressurised with an air-fuel mixture, not air only.


An electronic fuel management would be very nice, but not strictly necessary. (btw OS Engines has an EFi unit for nitro engines...) Most of 1:1 supercharging development comes from 1930s-1960s, think 1930s Blower Bentleys and the numerous "bolt-on" kits later available for little British sports cars of the 1950s.





However, pumping in extra mix into the chamber would only marginally increase the power imho. Very very small margin... for a lot of extra complexity.


You'll get much better returns in making sure the engine is gas flowed and the exhaust is correctly "tuned" for the rev-range that you use most. (The major experts on pipe tuning is usually the dirt-bikers who race 2-strokes.)
 

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Discussion Starter · #4 ·
Thanks for the insight into this gadget guys, its appreciated.


Still like to hear from someone that has one fitted. Or maybe a link to some video of a savage running the blower.
 

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2 stroke engines dont have valves, the air rammed in will mostly escape through the exhaust ports.
 

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Savage SS said:
well i thought it was cool

For the sake of saying look at me I have a supercharged savage, it would be cool. I've heard they chew through heaps of fuel for bugger all benifit...
 

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Should be called a SuperLeaner.


Regards,


Chris
 

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well iam saving for a Sirio .27
should get in a month or two
 

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crap. does nothing and is a complete waste of time. iff u knew how super chargers work and how 2strokes work then u know that it wouldnt work.
 

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Didn't some semi's have two stokes that were supercharged? Or were they all turbos??
 

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explain how it wouldnt work? its compressing the air/fuel mix to fit
more in. it wouldnt matter if you had 2 strokes per cycle, you are
compressing the mixture so you can fit more in the chamber to
burn.
 
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