This is all in the subtlety of perception and conduct of the driver. If you alternately drive country roads, highways, mountains, you will have trouble perceiving anything, but on an identical route, only one driver, you will feel the difference and possibly this will be confirmed by your consumption. But the most characteristic is the drastic reduction of CO, a gas toxic to humans, which appears on CT measurements, where no subjectivity is possible.Okay, well I'll test ...
On the other hand, my admission to the carburetor is 100% homemade ... the original air box was cracked and I was in trouble ... Suddenly, to "respect" the meaning, it is possible to make 2 vortices, one in one direction, the other in the other direction, of course, not installed at the same time lol, but to compare, like 2 full with one, 2 full with the other ..?
How to see if one is more effective than the other?
For the meaning, from memory (?) You just turn it over - (to check)