I was looking at the 4X. Opinions differ because electricity will find ground through only one of those four posts at a time. I'm also wondering given my head was shaved, when does plug depth become an issue ?I used NGK Iridiums.
If you are using helically wound wires you should be able to get by without resistor plugs and still be able to get decent AM radio reception. Resistor plugs, resistor wires, or helically wound wires are all designed to increase the rise time of the spark waveform. This reduces harmonic emissions in the radio spectrum. You should not need to use more than one of those solutions together, and if you don't listen to AM radio, you probably don't need any of them. In terms of performance, the helically wound wires have much less of an effect on spark amplitude than the resistor solutions but if your ignition system is in good shape, I'm not sure you would notice a huge difference between them.Don says: used to use Champion N9Y plugs but for my new engine I got NGK BP6ES plugs based on what I have read here. If I wasn't using using helically wound wires for RF suppression, I'd go with the BPR6ES.
i have to buy a new set of s.p., (i use helically wire leads), wich plugs i should buy? i currently run a set of bosch WR7DP that are really white for overheathing (probably due incorrect inition timing), all the manual that i found says to trash the plugs if they are so white
last year i purchased the bosch platinums because found a text on the wiki xweb section that says they add 3hp (!!) i didnt belived that but thought anyway they are good sparkplugs
I guess he forgot that Ohm's Law can also be written as I = V/R so the spark discharge current is going in the wrong direction as R goes up. Did he do one of those deals where they put the car in a big bag and fill it with nitrogen? Hopefully, he remembered to drain the gas tank.Back in the 70's I participated in a SAE certification program. One of the instructors prided himself as being very scholarly, highly experienced, and on the cutting edge of automotive technology. He insisted the greater the amount of resistance built into the secondary spark system (high side), the greater the spark will be at the plug tip. Something about Ohm's Law and how overcoming resistance increases the potential. So his theory was to use resistor wires, resistor plugs, and a cap / rotor made with high resistance material (can't recall what that was). But then again, he also purchased a new Corvette and sealed it up to hold onto until it became worth a million dollars. Wonder if he is still hiding that car and waiting for it to appreciate? And if his daily driver starts on a cold morning?
Is there an advantage to the iridium? I thought iridium was more for long life, so you don't have to change them for another 100K.I used NGK Iridiums.
That might have been a consequence of what I said earlier; NGK offers a very limited heat range selection for each application. Their entire line of plugs is significantly less than that of other plug makers. So the plugs recommended for any given application may be off by as much as 3 or 4 heat ranges (compared to what the others offer). Therefore the ones you had might have been too hot, and the electrodes burned off. To further complicate this problem, if you went to one size colder NGK plug it might have been way too cold and fouled. They just don't offer enough of a heat range selection to work in many cases. I'm not bashing NGK, just relating what I've found in my experiences; in my opinion sometimes it does matter what brand you choose.As for NGK Iridium, I tried those in my old 5cyl 20v turbo Audi. Burned the tips completely off the plugs in 11k miles.