Impulse Drum Supercharger

[canthai55]

Found this while searching for a boost controller for my CRF

Definitely thinking outside the box ...

http://alterego-hardware.com/1-supercharger.html

Edited October 7, 2017 by canthai55

[CMKiwi]

i'll say.....and wonder if anyone has actually made/trialled one yet.  I cant quite see how this would work.  Are they saying that vibrations from the exhaust pipe will vibrate the drum which will then force air into the cylinder?

 

I understand the principles behind standard turbo's and superchargers but this one has me beat.  Turbos use the exhaust gases to spin a turbine, whereas the supercharger uses the crankshaft to drive the turbine.

 

This looks too simple IMHO.  But sometimes the simplest things are the best....

[papa al]

Like a diaphragm pump.

[VocalNeal]

It might work? Stranger things have happened. It is a diaphragm pump. Took me a few minutes to work out the diaphragm deflection! 

 

Not small! About the same size as a dinner plate. 

 

All the 16 year-olds in Europe will be all over these in their quest to get their 125 scooters to go faster

Edited October 8, 2017 by VocalNeal

[canthai55]

 

bikes like the KTM RC390, which Alter Ego mounted a dual drum kit to and tested an immediate 15% increase in power across the entire rev range with no tuning.

http://www.bikebandit.com/blog/post/drum-chargers-cheap-bolt-on-forced-induction-that-actually-works

Edited October 8, 2017 by canthai55

[VocalNeal]

Karts used to have engine impulse diaphragm fuel pumps, chainsaws still do.  So it works for liquids. I think we will have to wait 9 years ,or whatever it is, until whatever patent they think they have has expired.  Then they might find their way onto scooters which have a significant airbox hanging off the side.

Edited October 10, 2017 by VocalNeal

[CMKiwi]

I wonder what sort of strange 'noise' these pumps will make or will the noise be drowned out but the increase of horsepower generated as sound out the muffler?

 

I do remember diaphragm pumps from something on the farm years ago...no real noise to speak of.

 

If you acquired one of these and coupled it with say after market FMF silencer/muffler/exhaust plus put in a programmable fuel controller what the increase in actual horsepower vs torque might be.  I did all of this less the diaphragm pump/turbo unit on a CRF250m and the increase was noticeable (Plus i also did the airbox mod).

 

It could be an interesting design to follow...