Supercharger...

[jonbuoy]

What do turbochargers use? Scotchmist?

Turbo is a gas compressor with a turbine not a "fan". Fans make stuff all static pressure.

[bogan]

Turbo is a gas compressor with a turbine not a "fan". Fans make stuff all static pressure.

so what about propellers? they are basically a fan, they seem to work pretty well....

[schrodingers cat]

[youtube]364dzVsBs2o[/youtube]

The funniest thing about this is that if you try to watch it in You Tube itself, it comes up as having been flagged as inappropriate...??? WTF?

I mean, who by? Bricklovers?

Some brilliant stuff there. More of this sort of thing thanks

[jonbuoy]

so what about propellers? they are basically a fan, they seem to work pretty well....

They are good at moving a lot of air not compressing it ie "static pressure", the compressor blades in a turboprop engine look nothing like the propellor blades on the front of the engine, designed for two different purposes. My point is these small electric fan based "turbo" chargers don´t work, it would be possible to drive a roots or rotrex type of charger with an electric motor that would give you a decent amount of boost, but you might as well power it from a belt on the engine.

[Ocean1]

think your average supercharger will take 10-20% of the engines hp to run it,

Depends.

A top fuel rail blower drive has to be good for about 300hp.

[Ocean1]

Fuck all to do with mains frequency, they're not usually a synchronous motor.

[pete376403]

They are good at moving a lot of air not compressing it ie "static pressure", the compressor blades in a turboprop engine look nothing like the propellor blades on the front of the engine, designed for two different purposes. My point is these small electric fan based "turbo" chargers don´t work, it would be possible to drive a roots or rotrex type of charger with an electric motor that would give you a decent amount of boost, but you might as well power it from a belt on the engine.

EcoMotor ( www.ecomotor.com/technology ) have a turbocharger with an auxilliary electric motor to assist the turbo to spin up quickly (and can act as a generator when the turbo is driven by exhaust gas).
Also a turbo compressor wheel is designed to get low pressure air moving at high speed. When te air slows down in the diffuser, thats where the pressure rises. Anyway, air pressure isn't as important as volume (flow)

[bogan]

They are good at moving a lot of air not compressing it ie "static pressure", the compressor blades in a turboprop engine look nothing like the propellor blades on the front of the engine, designed for two different purposes. My point is these small electric fan based "turbo" chargers don´t work, it would be possible to drive a roots or rotrex type of charger with an electric motor that would give you a decent amount of boost, but you might as well power it from a belt on the engine.

you've lost me, a turboprop runs a turbine to drive a propellor doesn't it? so the turbine shaft is driven by the gases, we are talking about the opposite here. the way I look at it, is if the prop on a plane is creating forward force, theres gotta be a pressure on the back of the blades right? Newton's third law init.

Depends.

A top fuel rail blower drive has to be good for about 300hp.

so whats that equate to? bout 25%? man those things are awesome

[jonbuoy]

you've lost me, a turboprop runs a turbine to drive a propellor doesn't it? so the turbine shaft is driven by the gases, we are talking about the opposite here. the way I look at it, is if the prop on a plane is creating forward force, theres gotta be a pressure on the back of the blades right? Newton's third law init.



so whats that equate to? bout 25%? man those things are awesome

You´ve lost me as well, I was talking about the design of the blades and the difference between a compressor fan and a propellor fan, different beasts.

[jonbuoy]

EcoMotor ( www.ecomotor.com/technology ) have a turbocharger with an auxilliary electric motor to assist the turbo to spin up quickly (and can act as a generator when the turbo is driven by exhaust gas).
Also a turbo compressor wheel is designed to get low pressure air moving at high speed. When te air slows down in the diffuser, thats where the pressure rises. Anyway, air pressure isn't as important as volume (flow)

Sounds like a great idea to reduce lag, my point is these crappy internet electric turbo chargers are snake oil, sure somebody somewhere has coupled a proper supercharger to an electric motor but the ones from the orginal post aren´t that type. Big difference between a proper supercharger/turbo impellor spinning at 200,000 RPM or so and an electric motor with a fan on the end of it.

[bucket boy]

Sounds like a great idea to reduce lag, my point is these crappy internet electric turbo chargers are snake oil, sure somebody somewhere has coupled a proper supercharger to an electric motor but the ones from the orginal post aren´t that type. Big difference between a proper supercharger/turbo impellor spinning at 200,000 RPM or so and an electric motor with a fan on the end of it.

I would love to have a engine that could handle spinning a blower that fast.

[jonbuoy]

Small turbos have those kinds of speeds - ie small car & motorcycle turbochargers.

[avgas]

a litre bike at 1100 rpm (idle for a GSXR) will be sucking 1100 cubic litres of air per minute.

I thought the intake valves close in a 4 stroke engine.......

[imdying]

I thought the intake valves close in a 4 stroke engine.......

Going to quote the rest of his post or even sentence, or just the bit that suits you?

Come on, tell us the truth... you're not actually retarded enough to think that one of those would have any positive effect on your engines output, right?

[bogan]

You´ve lost me as well, I was talking about the design of the blades and the difference between a compressor fan and a propellor fan, different beasts.

you were saying fan blades created fuck all pressure, I was attempting to re-educate you clearly the design is different, but it doesn't have anything to do with you original statement.