Still testing the Bobina bifilar coil, but the gas gauge is reading somewhat higher than normal for the distance I’ve travelled since installation. (Yesterday was particularly humid here, and in the 40mi I drove, I saw 2.2L/100km Frequently on the instantaneous readout in my instrument cluster- that’s in the neighbourhood of 83MPG!!!) And that’s just with a 13-turn coil on the fuel supply line closest to the rail in the engine bay. I’ll install the 2nd recommended one on the supply line to the filter next time I’m underneath doing an oil change in a couple of weeks. Much more noticeable than the magnets I removed, which I attribute directly to the field surrounding the line completely.
Also, since colder weather is coming and I’ll need to start using the heater, I’m wondering about placement for another on the coolant system- something tells me the lower rad hose is the spot, because the fluid is cooler, denser. I’m also considering one on the air intake snorkel, between the MAF sensor and TB. Air is also a fluid, after all.