I used to see a lot of TV commercials advertising the Splitfires, but I haven't seen anything about them for years. The concept seems logical, but I have no experience with them to know if the concept works.
I was going to try them in my car once, but the mechanic talked me out of it. Said they were the biggest joking around (his opinion, I was too ignorant to have one of my own). As he explained it to me... electricity follows the path of least resistance. So it will follow one of the tips, not split and go to both. Take that for what it's worth. I didn't buy them though...
I've talked about that with my Kawasaki mechanic, and he strongly suggested me to keep with the NGK. He said it would be good to improve inside the NGK range (they have better ones than the standard) but not to change brands. NGKs are great, he said. So, now I've changed them to better NGKs but I did not feel any difference. Haven't dynoed it yet, because I'm getting my Akrapovic + Dynojet + K&N fitted this week.
Try some NGK CR9-EIX. These would be the Iridium varients of the CR9-E. According to Motoman, plugs like the split fires might produce a little more power, but that's not down to a more efficient spark plug; it's because you're taking up a little more space in the combustion chamber thereby raising compression! It's a simple gimmick in my opinion.
Sounds good, and just to clarify, my mechanic wasnt saying they were a crap plug, but he didn;t think they were worth the price (others had the same quality/performance for less $$$). His point was it was not worth paying more for the gimmickry since it wuld not actually "split", and that was how they claimed all the 'extras' were achived.
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