Stupid hairbrain idea? Engine boost alternative

[Bitsyncmaster]

WOW, big current numbers. Success of something like this definitely depends on the percentage of time that it actually needs to engage versus how much time can be spent "charging up" for the event.

Bit; is it reasonable to be able to deliver a "few seconds" worth of such current from capacitors or other means? Or is this out of the realm of practicality?

Can't store much power even in those super caps. What could be done is charge a battery pack. Maybe use a higher voltage electric motor to get more efficiency. They do that with electric cars (200 to 400 volt).

[LEVY]

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As far as I know, capacitors charge/discharge in a split second, so capacitors should be left out of the equation, unless used just to give a bust to start the motor, then batteries would take over

WOW, big current numbers. Success of something like this definitely depends on the percentage of time that it actually needs to engage versus how much time can be spent "charging up" for the event.

Bit; is it reasonable to be able to deliver a "few seconds" worth of such current from capacitors or other means? Or is this out of the realm of practicality?

Can't store much power even in those super caps. What could be done is charge a battery pack. Maybe use a higher voltage electric motor to get more efficiency. They do that with electric cars (200 to 400 volt).

[propony]

Back in May, HotRod magazine did a story story using gas leaf blowers on a 1985 Corvette they are giving a slow death to, spent $413.93 on 2 Sears blowers 470cfm's each, for a total of 940 cfm's, gained about 50 hp. Then for comparison, they just sprayed nitrous across the top of the carb, not into the intake, and it had better results.
In the end the blowers did work, although not electrically powered, it would be a good read or check out U-Tube, that is where they got idea.
Curt

[DCUK Martin]

I used a quick online calculator; 4000 rpm, 2.89l displacement and 75% volumetric efficiency gave about 150 cfm air intake. The really powerful air blowers that you see in public restrooms (the new models), move close to 400 cfm I believe. Yes, that takes a quick jolt of juice to do, so this wouldn't be a painless idea.

Hand driers are all about shifting air, not pressurising it. Even the best hand drivers barely acheive a pressure differential in the kilopascals. You can do some relatively simple Gas Law calcs to work out the kind of power required to shift a lot of air and generate a meaningful pressure gain. It's astonishing to realise how much energy is transferred down a turbo's shaft.

[Bitsyncmaster]

Hand driers are all about shifting air, not pressurising it. Even the best hand drivers barely acheive a pressure differential in the kilopascals. You can do some relatively simple Gas Law calcs to work out the kind of power required to shift a lot of air and generate a meaningful pressure gain. It's astonishing to realise how much energy is transferred down a turbo's shaft.

Isn't that why we need to cool the air? All that energy making the pressure raises the temperature of the pressurized air.

[DCUK Martin]

Yes. Pv=RT

Pressure x Specific Volume = Gas Constant x Temperature (Absolute)