WTF

[tatters]

Just seen this in a another thread

https://cgi.ebay.co.uk/HONDA-YAMAHA-ETC-ELECTRIC-CDI-BIKE-MOTORBIKE-TURBO_W0QQitemZ8032202807QQcategoryZ25623QQrdZ1QQcmdZViewItem


Would,nt that just make the mixture very lean and seize the bike


(also its a "supercharger" and not a "turbo" right?)
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[LustyLew]

I thought a 'turbo' did 'something' (very technical term there!) with the exhaust gases, hence turbocharged bikes not having an exhaust can?
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[hazza]

that wouldnt work on a two stroke it would just push unburnt fuel through the exhaust port....how does that make a 35% power increase....bullshit
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[DaveH]

'Tis a bit bizarre!

I am assuming that it is just an electric fan to force more air through the carb, rather than using exhaust gasses! Similar to the ram air effect that some bikes use, I suppose.

Turbos are driven by exhaust gasses and superchargers are mechanically driven, so not sure what that makes this device.

Wonder if anyone has ever used one.

[Jack_Cheese]

Turbos use the exhaust gases to drive a compressor, therefore the faster you go, the more power you get. The reason for no can, is that the extra piping required basically means the exhaust comes out in an unusual position, where a can would just be awkward.

And why the hell can i never see the ebay links on this damn forum!?

Jack
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[www.125power.com]

judging from the ad there is no form of fuel management if you put more air and not more petrol your bike will ultra lean. This will not seize the engine if boost is activated at higher rpms, instead your engine will fucking detonate

For those who not familiar with denotation, it is most commonly a result of pre-ignition, this is where the hot spots in the engine (spark plug, piston crown etc) ignite fuel before the engine actually fires a spark!. In mild cases this will create knocking or piston slap, and as the engine heats up it gets worse and then the piston meets a violent explosion of fuel while it is rising up (either compresion or exhaust stroke) and it has no where to go, it cant go back down the result DETONATION.
Just how it sounds, fucking booooom
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[SteWhit]

That's not a turbo, it's a CPU fan with a metal case! Notice he doesn't take Paypal. Probably had too many people wanting their cash back when they found out it dont work! Also according to there fitment guild you have to run it with no air box?! Surly that's not exactly advisable without re-jetting?
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[G]

Looks like a PC fan.

As far as I know, for the 'proper' systems like this; to get a decent enough pressure, you need loads of batteries that get used up pretty quick.

[www.125power.com]

[beanington]

[www.125power.com]

Okay anyone with more tuning experience is more than welcome to step in and correct me but......

To get that fucker to work, you gotta rejet to suit, it will probably run fine from exsisting power on bike (scooter's probs need uprated battery at least). Okay you got all that sorted you can now drive about wasting lot's of petrol (as it wont be mixing properly due to the stupid fan)
You press the boost button and this fan speeds up pushing more air through the engine (if your lucky bike will run bag of shit and die, telling you its not right). So you figure it out and add a system that will inject more petrol just before the carb's mouth to stop it running lean when button is depressed. Now you have a petrol guzzling bike worthy for the drag strip right? wrong you press the button and the amount of fuel and air entering the engine is too much for it to burn effectively leaving your bike with less power and money then when you started, and in debt with shell or BP where ever you decide to get petrol from.

steer well clear, this is another power resistor of justice!
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[beanington]

ha ha that sounds about right actualy

[JamesVFR]

Hahaha thats hilarious, guaranteed to do eff all ! Turbos recyle exhaust gases to drive the turbine which is why the power comes though midway through the rev range, superchargers run off a belt from the engine, so are active at all RPMs. Although as said they need to be set up else... boooom ! A CPU fan would do absolutely nothing !

[Jack_Cheese]

seems more likely to inhibit airflow than improve it.

Jack
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[www.125power.com]

exactly........and if it does work it will over do it anyway
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[lilredmachine]

TBH, they use these sorts of things on big trucks, they are designed to increase torque and are called e-chargers (or hybrid turbos) i believe. A proper one can produce incredible power, and more importantly, it is lag free as the fan is kept spinning by the electric motor. A real one is still connected to the exhaust system, the electric motor merely combats lag, so this is not really a proper system at all. As has been stated, this is closer to a cpu fan in a shiny case than a proper e-charger. I should imagine it does provide some improvement, if only for a short time. Before boom.

[Kickstart]

Hi

The amount of electrical power required to drive a fan to produce some decent extra power would be hideous.

Doubt that produces any real boost. Probably a good job. It is blowing through the carb, so would (if it worked) pressurise it. Very good way of running very lean as the float bowl is not pressurised. Instead of drawing fuel out of the float bowl it would likely blow air into the float bowl.

Also no relation to engine speed, just a switch so pretty useless there.

Finally the air filter on it looks pretty hopeless. Pathetic surface area. That would be pretty restrictive.

Anyone fancy buying one to laugh at. Only trouble is it would cost far more in dyno time to show how useless it is.

All the best

Keith
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[Kickstart]

[lilredmachine]

[Kickstart]

Hi

Trouble with forced induction on a 2 stroke is that you loose massive amounts of power that you would gain from conventional 2 stroke tuning. Loads of extra complexity and weight for no real advantages that cannot be gained another simpler way.

All the best

Keith
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[lilredmachine]

Yeah, that is an issue, also an avenue for 4t that is pretty much closed off to 2t.
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[Kickstart]

Not really closed off, just that a 2 stroke can be tuned to the same level without needing the complexity.

Only way 4 strokes are going to catch up much more on power is by having the engines have a shorter engine life (already happening, with the new Aprilia V twin having a similar piston life expectancy of an RS125).

All the best

Keith
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