I've been hearing alot of bad things about a split fire plug. I have one in my 400ex. Has anyone else heard anything about the splitfire plug? I noticed better throttle reponse with the splitfire, but i would like to know the hard facts on the plug. From what i've heard, it's not too good for your cylinder. Is this because of the extra heat produced? We all know that anything that would make the 400ex run hotter is a bad thing! Just wanted to know if this is true or not.

 

I have never had a problem with splitfire plugs.The idea is basically the same as an old racers trick of cutting the electrode back so the spark jumps sideways.The purpose-spark exposed directly to fuel mixture.Dyno tests have shown a slight increase.Just make sure to get correct plug for particular motor.

 

The NGK website carries a good explanation of the function of "multiple ground" or whatever designation a Splitfire carries; NGK makes 'em (multiple ground plugs), too.

According to NGK, applications where multiple grounds provide advantage are rare and specialized. However, I believe Splitfire plugs "do no harm," as in the Hippocratic oath.

Tree Farmer

 

they foul easy i hear.....

 

they are EXPENSIVE gimmics. a spark will travel the path of least resistance and/or shortest distance. spiting the electrode will serve no real purpose, other than for marketing.

i'm sure the electricians on the board can (and have) explain this better

 

Here is a webpage with a run down of a little trouble Splitfire was in with the FTC (Federal Trade Commission) for false claims and testimonials.

That came from http://www.magnecor.com/ Magnecor's website, manufacturer of some of the best plug wires on Earth. They have quite a bit of good reading on their site, give it a visit.

I may have gotten bad data somewhere, but I believe Splitfire is nothing more than a marketing company that markets these plugs that are acutally made by Bosch (a person has gotta ask himself why Bosch doesn't want their name associated with them).

 

Hard facts, a spark plug cannot amplify a spark that comes from voltage generator, less resistance maybe. I have heard the Federal Trade Commision news also.

However, I have a 400EX and brand new was fouling plugs regularly (1 plug to every 2 tanks). I put a split fire in about 10 months ago and still have not fouled a plug (motor is still stock).

I can't tell if I am running hotter or not.
No, I don't believe in all the hype, etc. But, the results are there for me and I don't change plugs any more.

 

It's all marketing hype. For Adams44, maybe this splitfire was just the ideal heat range for your engine. As to more spark making the engine run hotter(not that I believe that the splitfire gives any more spark), just the reverse is true. Ask any aircraft mechanic, as all gasoline powered aircraft engines run dual sparkplugs. You turn one set of spark plugs(leaves one plug firing in each cylinder) off at a time as part of a preflight check. The exhaust temps & cylinder temps rise when only one sparkplug is firing and cool back down when both plugs are firing. The splitfires may be good plugs, but their claims are false & they are way too expensive.