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#Post#: 99351--------------------------------------------------
Hiclone fuel savers.
By: spitfiremk1uk Date: October 18, 2015, 12:00 pm
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I just had a conversation about hiclone fuel saving devices with
a self interested party (he was trying to sell them). I have to
laugh at his knowledge and sales bullshit that he is apparently
taught to try and sell these things.
So a few thoughts...
The hiclone device claims to reduce fuel consumption, reduce
emissions, give more power. And all by simply fitting these
little stainless steel "widgets" into your induction system.
First of all I can already hear the screams of laughter and
ridicule from many that have had conversations or looked into
these things in the past. For the most part, I agree. The
suggested installation methods and suitable vehicles list strike
me as pure bullshit.
However. It is not as simple as all that!
Fitting a hiclone into a turbo diesel engine inlet pipe before
the turbo or in some cases, as suggested even before the air
filter! And hoping it makes a difference is just plain silly. It
will do nothing apart from restrict airflow and have simply no
effect. So no sale on the suggested applications!
Fitting the hiclone on a N/A diesel might seem more realistic
but again the reality is having swirling air before it hits the
air filter is pure sillyness. Even after the filter and before
the inlet manifold is equally useless because there is no fuel
to mix until the injector does so but only inside the combustion
chamber after the piston has compressed the charge to Very high
pressures and with huge squish areas making the swirling inlet
charge seem insignificant.
So maybe a petrol engine application makes more sense?
The 2.25 and 2.5 petrol engine uses a carburetor to introduce
fuel to the inlet charge. This is more likely to benefit from a
hiclone.
First let me suggest that properly mixed and distributed fuel
and air is very important to our petrol engines. any method that
makes the fuel and air burn more effectively and completely will
indeed produce more torque for us to use. So maybe this hiclone
has a place for our petrol engines... Except!
The suggested position for a hiclone is in the inlet pipe to the
carb. Some even suggest at the top of a snorkel!
A carb likes to have nice straight, fast moving air passing
through it. A carb can meter fuel more accuratly if the airflow
is smooth. So the last place you want to put a hiclone is before
the carb. This effectively means you need at least some mechanic
skills to install a swirl device capable of making any
difference.
If you have a hiclone or want to try it, the only effective
method would be to install 4 hiclones. 1 In each inlet port of
the cylinder head, probably between the cylinder head and the
inlet manifold. The air has been measured and the fuel supplied
in the carb and manifold. Just before the inlet valve it might
be worth a few ftlbs of torque to remix/mix properly the fuel
and air about to enter the cylinder. It might also help
introduce swirl into the combustion chamber at very low rpms
which helps with combustion (direction of swirl needing to be
reversed for 2 of the cylinders!). Whether or not you use the
power or lift your foot off the gas pedal will decide if you
gain power or save fuel. 5%? Maybe. 6 or 7 ftlbs of torque? It
is possible. Just like you can feel the engine running sweet on
a cold damp night. It makes a difference. But not much.
Hiclones in the inlet pipes before the carb or fitted to a
diesel engine especially a turbo diesel is still pure sillyness.
And unless someone can convince me otherwise My position on the
subject will remain.
#Post#: 99361--------------------------------------------------
Re: Hiclone fuel savers.
By: DarrenH Date: October 19, 2015, 5:45 am
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100% agree, the notion that any kind of motion or suggestion to
direction of air, introduced at the air filter, would survive
past the valve throats, absolutely defies physics.
ignoring all the treacherous physical turns that air has to
take, and passing through deliberate narrowing (carb venturi and
valve throats to name two) there is also the assumption the
engine is processing air in a lovely smooth transaction from air
filter to exhaust, like a flowing river. this is false, there
are high and low pressure waves running up and down the inlet
manifold runners, air/fuel does and will stall momentarily and
is constantly changing based on rpm and load
i would also go as far as to suggest that as soon as you fit a
device intended to decrease fuel consumption, you start driving
carefully to prove it, then end up with a catering sized portion
of confirmation bias
#Post#: 99374--------------------------------------------------
Re: Hiclone fuel savers.
By: jonny Date: October 19, 2015, 4:50 pm
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i love all the claims these companies make. Surely if it was
that easy everybody would be doing it
#Post#: 99381--------------------------------------------------
Re: Hiclone fuel savers.
By: edd Date: October 20, 2015, 6:28 am
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As you say using Hiclone type idea in the inlet after carb would
help. The cars that have been built to do the shell fuel
marathon competitions use this sort of idea. Getting maximum
mixing of air and fuel to get the economy as high as possible.
And achieving some ridiculous numbers. But definitely a long
way removed from what they claim.
Ed
#Post#: 99392--------------------------------------------------
Re: Hiclone fuel savers.
By: Peter de Dawg Date: October 20, 2015, 3:15 pm
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Was the bloke flogging 'em wearing a top hat ? :toothless:
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