Having had a look at Ecoteks web site, they list an example of this wotnot being used on a couple of Alfas The info is under the Cars and Fittings menu see
Alfa V6 24v
The V6 24v comment runs something like this
Paul Martin fitted the device to his Alfa V6 in February 2002 and here are his comments:
"The Ecotek seems to be doing its job the car is more responsive in the lower rev range, I just came home from Wales, were I did some driving around Snowdonia and Blaneu Festiniogue, I did less gear changes than I expected and the car pulled easily in 6th gear on hills were I would have expected to change down to 5th or possibly 4th.
As for consumption figures I will give these at a later date as I have just done a lot of fast dual carriageway and fast Welsh back roads, this is not my usual driving haunt so it's not a true representation of my usual driving style, saying that I did 225 miles to half a tank so its looking good."
I am still in need of current opinion.Having trawled through all the AlfaOwner threads provided by Wrinx it would seem that they had a right royal argument over it!
Now if we are all sitting comfortably, I shall begin.
The scientific argument on this device is however sound. In any engine the fuel and air need to mix well and completely in order to get maximum burn efficiency. Fuel however is heavier than air and tends to sink to the bottom of the inlet tract air flow stream. In multipoint EFi engines this isn't so much of a problem as it is in carb or single point EFi engines. The fuel sits in one part of the air stream into the cylinder and then ignites on spark.
This widget, it would seem, introduces very short pulses of air into the inlet tract. The short pulses of air stop the smooth flow of air being possible. Therefore the fuel gets tossed about in the air flow on its way into the cylinder. The fuel stays remains higher in suspension in the air flow into the cylender, is better mixed and therefore burns faster and more completely.
The effects of this are that you don't use as much right foot to get the same go, hence better mpg,
your engine burns fuel more effectively and completely, hence lower emissions,
and the engine also produces more power as the burn is more complete and aggresive due to the increased mix quality.
Thats the science, but what is the on road effect?
Oh yes as to the issue on leaning the mixture, any CAT equipped car with a lambda has self righting capability, if the mixture leans out the ECU detects this through the lambda and corrects it by increasing injector opening time.