Pajero Owners Club of South Africa

Hi Guys,

I need some advice,

I found this product on e-bay (INTAKE Fuel Saver Increase MPG Gas Mileage +20 hp)

The seller seems to have a really good rep, and out of 600 feedback responses, almost 100 are from people who bought this product, all give a fantastic response, which to me says it should be a great product.

I am sceptical about this, as are others in my office, can someone with really good tech know-how, check it out,
is it just a gimmik or is there actually something to this product.
It doesnt cost much, about $10, but with the shipping etc, I'm not willing to just risk it without some advice from POCSA.

Thanks
Ned

those cheapies are usually an intermediate telling the ecu the engine is hotter than it is, or the timing is more retarded than it is, or the airflow is less than it is.

The result is a lean running over advanced engine. Good for short term racing gain. BAD for long term engine life.

Naturally aspirated cars are lucky to get 5% performance increase as there is limited you can do to add performance unless you physically modify the head, valves, stroke, bore etc and that stuff costs mega bucks.

Turbo cars benefit more from chipping as the boost can be upped and in conjunction with that the timing and fuelling can be adapted accordingly.

A good chip that still keeps the parameters in check usually starts at about R4000 so anything under that should ring

"tooooo good to be true!"

Just my honest opinion. Stay away!

Hi e4pikanini,

Thanks for the advise, I dont know if you took a look at the product, its seems to just be a static ring with fins cut into it
that fits into the air intake hose just before the air mass sensor,
anyway, the performance looked like a bonus, I'm actually looking for any way to save fuel,

Less fuel = more Pajero fun

are you talking about this?


that increases swirl and turbulence which allows less flow. Port jobs on race cars try and make the movement of air as smooth as possible.

It also gets straightened when it gets to the MAF as your MAF has fins like this (so you swirl the air and then straighten it again which is a waste of energy and if anything you will loose power due to the restriction, extra turbulence and possible heatcreation by the swirl and straighten of air)

Pajero MAF example

Hi 4epikanini,

Thats exactly it, and I see your understanding 150%,

Thanks for the advice, I must buy you a beer or 5 (maybe $19 worth some time)

p.s. Its Marius, isnt it,
You offer a lot of good advice, and want to make sure I've to your name right.

Mcnoogle wrote:Hi 4epikanini,

Thats exactly it, and I see your understanding 150%,

Thanks for the advice, I must buy you a beer or 5 (maybe $19 worth some time)

p.s. Its Marius, isnt it,
You offer a lot of good advice, and want to make sure I've to your name right.

No problem. I'm still learning a lot these days. I just took a farm manager job and I have no experience so my learning curve is climbing exponentially at the moment.

Marius is my name. That's correct. I'm 4ePajero's (Gerhard) son.

Stupid question but does this not act somewhat like a turbo by forcing more air into the air intake channel and eventually into the piston chambers? I understand the air gets straightened out again but is it not 'more' air that gets straightened out due to this device creating a faster flow of air through the air intake?

Just curious as always

Cobvs wrote:Stupid question but does this not act somewhat like a turbo by forcing more air into the air intake channel and eventually into the piston chambers?

Unfortunately not. Introducing swirl requires energy, which is derived from the intake air stream (there is no other source). This will manifest as an increase in the intake pressure drop, which would mean that intake air would be at a lower pressure (hence lower density) than before. This is exactly the opposite of what is required for volumetric efficiency. Turbo-chargers use energy that would have been dumped out the tailpipe to compress intake air to a pressure and density higher than atmospheric in order to increase volumetric efficiency.

Cobvs wrote:I understand the air gets straightened out again but is it not 'more' air that gets straightened out due to this device creating a faster flow of air through the air intake?

No, due to the pressure drop the air mass flow would be less than without the gadget installed. I am not sure whether all of the vorticity introduced into the flow would be cancelled by any straightening vanes in the flow path. It is possible that the large vortice would be broken down into several smaller ones. The result might be that the flow entering the combustion chambers could still have greater vorticity than without the gadget and this might facilitate improved mixing of air and fuel and more complete combustion. The catch is that any (dubious) improvement in combustion efficiency would have to exceed the definite drop in volumetric efficiency due to the increased intake restriction. It is doubtful that one would end up with a net gain...

OK I get most of it . I have also looked at the Tornado (similar like device) on the internet and it seems that the contraption is placed after the MAF on injection based vehicles. The straightening of the air happens before the MAF if I have it correct (beehive structure after airfilter and before MAF?).
Does the swirling not compact the air (higher density) and also speed up the flow? Looking at a real tornado the end point(eye) is always where the windspeeds are the highest.

Taking an expanse of air at high (atmospheric) pressure and start feeding it through a tunnel to another area with low pressure (suction of piston) will create speeding up of the air and swirling of air by nature of inconsistent pressures at entry and movement along corners on the way. :?:Why does the air get straightened ? a) To improve airflow or b) to assist MAF in getting consistent airflow for reading?
If it is b) only then this device recreate swirling effect before air was straightened. If a) then this device should not be there ...

Would be nice to see a smoke passing through the whole process with an without it.

Cobvs wrote:Does the swirling not compact the air (higher density) and also speed up the flow?

No. If air is accelerated while the mass flow rate remains the same (say by passing it through a venturi or restriction), the pressure is reduced according to the Bernoulli principle.

Cobvs wrote:Looking at a real tornado the end point(eye) is always where the windspeeds are the highest.

The eye of the Tornado is its center or core where it touches the ground and the wind speed is actually least at this location. At the edges of the funnel, the wind speed can be horific (more than 450 km/h). By the way, violent storms like tornadoes and hurricanes are typically associated with low atmoshperic pressure.

Cobvs wrote:Why does the air get straightened ? a) To improve airflow or b) to assist MAF in getting consistent airflow for reading?

In my opinion the flow is straigthened to improve the consistency of the MAF sensor reading. More vorticity is actually beneficial to uniform mixing of fuel and air and hence to complete combustion.