Running on Air

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Liam - 13 Oct 2004 14:12 GMT

Came across this advertised in a magazine
www.runningonair.co.uk
Claims to reduce fuel consumption by 20% or so.
Anyone tried one?

Liam

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Tim Hobbs - 13 Oct 2004 18:00 GMT

>Came across this advertised in a magazine
>www.runningonair.co.uk
>Claims to reduce fuel consumption by 20% or so.
>Anyone tried one?
>
>Liam

Lots of stuff on their website, but virtually no information about
what it actually is!

If it works (which I doubt enormously) it would pay for itself in
weeks for me. So I'm tempted to have a go at it on the Volvo - I have
quite good reference data for current consumption - a virtually
constant 31mpg.

Signature

Tim Hobbs

'58 Series 2 88" aka "Stig"
'77 101FC Ambulance aka "Burrt"
'03 Volvo V70

My Landies? http://www.seriesii.co.uk
Barcoding? http://www.bartec-systems.com
Tony Luckwill web archive at http://www.luckwill.com

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Phil Gardiner - 13 Oct 2004 20:28 GMT

"Liam" <liamhoskinAT@blueyonderDOT.coDOT.uk> wrote in news:QQ9bd.70425
$BI5.25570@fe2.news.blueyonder.co.uk:

> Came across this advertised in a magazine
> www.runningonair.co.uk
> Claims to reduce fuel consumption by 20% or so.
> Anyone tried one?
>
> Liam

Having read the "technical" section and its patent-speak wording, it
appears that all it does is lean the fuel mixture out at part throttle.
This will improve fuel consumption but if not correctly done can do some
serious damage to your engine eg melted pistons.

Also I'm not convinced that it will work on all fuel injected engines.
They mention that it will work with Mass Airflow (MAF) systems which is
correct but with a Manifold Absolute Pressure (MAP) system it is highly
unlikely to work and will probably increase fuel consumption as the fuel
injection ECU will "see" a higher load than expected and inject more fuel.

If you've got a carburettor engine then just loosen the inlet manifold nuts
by an equal amount to introduce an air leak, it'll have just the same
effect but at zero cost.

Regards

Phil Gardiner

Don't forget to check out the alt.fan.landrover FAQ @
http://cgi.mininut.force9.co.uk

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Austin Shackles - 14 Oct 2004 07:23 GMT

>Also I'm not convinced that it will work on all fuel injected engines.
>They mention that it will work with Mass Airflow (MAF) systems which is
>correct but with a Manifold Absolute Pressure (MAP) system it is highly
>unlikely to work and will probably increase fuel consumption as the fuel
>injection ECU will "see" a higher load than expected and inject more fuel.

Also, most modern systems use closed loop with a lambda sensor, so allowing
more air in will result in it seeing the exhaust looking too "lean" and
dumping more fuel in accordingly.

sounds like the "extra air valve" that ancient engines used to have in the
days when they didn't have anything much in the way of a carburettor.

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