fuel catalyst

All very true but have you used these products?

Janset. I think the thing you are talking about is the 'Hiclone'. I did some research into the device a few years back and found the following. They are supposedly fitted from new to all Hyundai engines. The best way to describe them is if you could imagine a set of angled stainless steel blades, joined at the centre, and fitted inside a stainless steel ring. You install the device into the rubber air hose between the air filter and the inlet manifold. As air is drawn into the engine and passes over the blades, a vortex is created which speeds up the air flow. It then enters the combustion chamber at a greater speed which supposedly increases the atomisation of the fuel and therefore gives a better burn and better fuel efficiency. I can't see how this turbulence can reach the combustion chambers after it has passed around so many bends and valve bosses. It all sounds very plausable, but as said by Oziexplorer, if it was any good why havn't the car makers adopted it. I've been told that where the ring is located in the pipe is also critical and experimentation should be done. I met a guy who had one and he swore by it. The problem is, the people who fit these things give their opinions using the senses of the human body. The guy I believe is the one who can produce honest figures from a chassis dynomometer-dynos don't lie! Hope this helps.