I took the highest and the lowest mpg and times and discarded them to come up with an average for each plug in each category. My tests indicate that the only significant increase was with the Splitfire Triple Platinum plugs. It also shows that mpg actually decreased with the E3, Torque Master, and Bosch Platinum +4 plugs. According to the Splitfire website, their plugs sell for $5.99/plug. My conclusion: While Splitfire Triple Platinum plugs do give slightly increased mileage, it may not be worth the added cost.
Horsepower is how hard you hit the wall, torque is how much of the wall you take with you.
No you drill a 1/16" hole in the bonding strap above the electrode and then dish the electrode a little so that when it fires the spark will go through the hole in the bonding strap for more spark front. There's pictures in the link. It an interesting idea, granted that there is only 2-3% to be gained in this area but every bit helps.
The link no longer works. I have heard of people doing this before, but never knew exactly how it was done. Does the hole go directly above the electrode? What do you use to dish out the electrode?
I remember The RoadWarrior..To understand who he was, you have to go back to another time..the world was powered by the black fuel & the desert sprouted great cities..Gone now, swept away..two mighty warrior tribes went to war & touched off a blaze which engulfed them all. Without fuel, they were nothing..thundering machines sputtered & stopped..Only those mobile enough to scavenge, brutal enough to pillage would survive. The gangs took over the highways, ready to wage war for a tank of juice
Lowering your gap from stock is like advancing your timing because of the lower voltage requirement.
Drilling a hole in the ground strap only serves to give a better 90 degree angle for the spark to jump to, lowering required voltage to fire the plug, and, again, advancing your timing. The spark won't fire through the hole either, it'll fire to the point of least resistance (closest point), the bottom near the electrode.
Increasing the voltage(or gap) will give you better ignitabillity when you go into lean burn. What you really want though is more current to the plug. Automotive ignition systems are grossly inefficient.