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Thread: Superchargers

  
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    Superchargers

    Hi folks,
    Just out of interest has anyone tried one of them electric superchargers of the bay of e. In theory forced air into the intake makes sense and for less than 100. Pounds cheap too ! Cheers all!

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    For a ton.......can't see that working

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    Smile

    Lol I know but has anyone been brave/daft enough to test it ? What would the air flow meter think of all that extra airflow?

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    At work one day we did the math on these things.

    Dont know if the math is correct but if it is then the little electric blowers should run out of puff pretty soon.

    An engine does 2 full rotations of the crankshaft for every air intake so of you have a 2000ccm engine it needs 2000ccm's of air (2 litres) for every 2 rpm's.

    A standard zafira has it's limiter at ~6000 rpm so if it is just going to deliver enough air to just keep up with the car without any added pressure it will need to be able to deliver :

    2000ccm * 6000rpm / 2 = 6000ccm's of air every minute.

    This equates to 100ccm's of air every second.

    And as i said, that is only to keep up with what the engine itself takes in.

    I am no eagle when it comes to pressure but i am pretty sure that to be able to an airpressure of say 2 psi you would need to double those figures....AND the blower would have to be able to build that kind of pressure..It cannot just be an open fan blade type.

    I dont know exactly how fast those small blowers would have to spin to deliver that kind of performance but i bet that it would take alot of amps to do so and atleast the one i saw did not look like an item that would do that.

    Zafiraowner

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    most of them are just a computer fan which you hook up to the battery. they cause a drag on performance rather than an increase so stay well away.

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    Thanks for the replies guys . Those little fans would need some juice to be able spin/deliver air REAL quick to keep up with the needs of the aspiration of the engine. If it were to be effective you'd probably need another battery or two to power it thus creating more weight ?

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    Quote Originally Posted by nanospasm View Post
    Thanks for the replies guys . Those little fans would need some juice to be able spin/deliver air REAL quick to keep up with the needs of the aspiration of the engine. If it were to be effective you'd probably need another battery or two to power it thus creating more weight ?
    Yeah AND it would probably also need a bigger generator and the drain from the generator would be so high that the lost HP's from driving the generator to make all of this extra power would be more than what would be produced.

    And another thing is that if those fans should be big enough and spin fast enough they would need real good bearings to avoid burning them out real fast as well...

    Zafiraowner

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    Quote Originally Posted by zafiraowner View Post
    Yeah AND it would probably also need a bigger generator and the drain from the generator would be so high that the lost HP's from driving the generator to make all of this extra power would be more than what would be produced.

    And another thing is that if those fans should be big enough and spin fast enough they would need real good bearings to avoid burning them out real fast as well...

    Zafiraowner
    Lol True possibly liquid nitrogen cooled bearings...

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    Tom{BSc}'s Avatar
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    At the end of the day if it was that easy and they are that good, all cars would have one. Avoid!
    124.6 Bhp and 133.5 lb/ft from an x18xe1 (Now Sold)

    Now Drive a Corsa VXR

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    Quote Originally Posted by Tom{BSc} View Post
    At the end of the day if it was that easy and they are that good, all cars would have one. Avoid!
    Agreed but most production cars these days are geared around efficiency but as above, the energy/fuel resources it would take for this kind of crap to work would render it a total no go

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