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There are hundreds of add on "gadgets" and oil/fuel mixtures that claim power increases, lower emissions, more miles per gallon, "smoother" engines, less engine wear etc.
Some things like the infamous Ecotek valve are extremely dubious at best. I used to have a description of what I thought here but was threatened by email by the company to remove it. So for the moment I have done so. In the meantime for excellent info on the thing check out this www.fuelsaving.info/ecotek.htm
I tested one on both all gear runs and power runs on a dynamometer, and at least on the vehicle tested XR2i it makes absolutely no difference whatsoever to the power produced.
Which is pretty much what I had expected. They do nothing other than let a little extra air into the intake manifold on over run which makes a noise. when you lift off your foot they work, they do nothing at all when your foot is ON the throttle...
But it *may* work for you, even if its only in your head! The dyno says otherwise though. I doubt they will include this "testimonial", because they only like nice ones...
Same with "magnets" that attach around your fuel line! They make all sorts of outlandish claims! They do nothing. Much like the magnets that are sold as cure all devices that you wear as a bracelet. And the same goes for the ones that are supposed to fit around a water pipe to soften the water! NONE work. I don't care what "claims" are made or how "rare earth" and fancy their magnets are!
The same thing applies to "power pills" and liquid additives sold as fuel "improvers". They just don't and can't do what the makers claim because as we read earlier the engines airflow must increase by say 15 percent to get a 15 percent power increase!
Some things CAN give more power if added to fuel, such as Nitro-methane, Nitro-benzene, etc. But they need to be in much larger quantities! And they work by being "oxygenators". They give power by being able to add oxygen to the engine! And if added in enough quantity to actually work they will make your engine run lean/weak and cause damage and corrosion problems. They will also turn your engine oil into a thin white milky mess in about 5 minutes!
Ask yourselves, why don't the manufacturers already fit these types of things? They would have an edge on the competition. If they really worked, they would fit them as standard! How much would it cost to fit say a "magnet" around a fuel pipe! Just think how much fuel a jumbo jet would save crossing the Atlantic! (10 to 20 percent claimed saving!) But the airlines don't use them either...
Some devices can work though, to a small degree if implemented properly. Free flowing air filters for example CAN help but only if this is the limiting factor in your engine setup. Its a balance. On a heavily tuned motor they would be essential. On an otherwise stock engine adding a K & N Filter for example would make little or no difference! Other than add a tiring noise...
The same goes for big bore exhaust systems - a tuned engine needs one. A stock engine will just be noisier, and possibly slower and less powerful at low RPM'S.
Boost "bleed valves" on turbo cars can be used to allow a higher boost level and improve power. But be wary of fuelling problems, and detonation problems if you go too far!
Anything that claims any power increase must do one simple thing. it MUST somehow increase the oxygen your engine gets, so it can burn more fuel. And a 10 percent increase needs around the same amount of extra air or fuel. If it doesn't do that it cannot work.
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