GZ 250 Forums - spark plugs

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- - spark plugs (http://www.gz250bike.com/forum/showthread.php?t=4708)

I was gonna get the dr8eix which is the iridium replacement for the dr8ea both ngk plugs

I've never seen, either through personal experience or documented material, any real proof that fancy plugs make a big difference on anything... car or bike.

Your ignition system can only output so much juice. The coil and the wires electricals are more responsible for getting a strong spark into the combustion chamber than the spark plug is (assuming the plug is right heat range and gapped properly). If you have upgraded the ignition system to a higher output, then you might be able to squeeze some more "umph" out of an engine with an expensive plug. (assuming, of course that you have already upgraded intake and exhaust and the only thing holding you back from making REAL power is the spark... But for the vast majority of us, that's just not the case.

It's only $9 bucks, so it's not a big deal. And sometimes we just want to mess with stuff so we can feel like we're doing our vehicles come good. I can certainly understand that. But don't do this just because you think it will make the bike faster. With a stock ignition, a fancy plug can do nothing more than a maintained OEM plug can.

The iridiums just last longer so you don't have to bother with replacements, like changing them every year or two in a car or bike is a real PIA or difficult task, they don't necessarily ignite the gas any better than a standard spark. The power is related to the exploding gas in the cylinder, not the hotter, if any, spark you get. If the gas explodes, it explodes, and a good plug will do that. Iridiiums can still get fouled or damaged by improper air/fuel mixtures, they are not immune, just less so than a standard plug.

Quote:

Originally Posted by Gz Rider

That being said, I've seen cars where it takes an act of god to get to the plugs.

I have a car like that, actually I have had two of them (the same car, just different years). I have a ford explorer, and it costs well over 200 bucks just to get someone to change the plugs in it, because the passenger side ones are so time consuming even for an experienced mechanic to get to, and virtually impossible for even someone like me with a toolbox full of tools to get to.

Quote:

Originally Posted by music man

Some Ford vehicles came from the factory with a two-piece spark plug that would separate when removed from the engine, leaving the threaded base seized into the head of the engine,requiring removal of the head to get the broken plug out.The aftermarket soon followed with a one-piece plug to solve the problem.
:) :cool:

http://www.denlorstools.com/autoblog/20 ... ad-design/
This explains it very well.

:) :cool: