LOL's.
Come off it, how can changing plugs blow your engine.........
I have used Bosch 4 tip spark plugs in Civic, installed them in 2006, after the 5000kms. Drove the car for 2 years (45,000kms) and sold it with the plugs. Things I noticed was better acceleration, smoother running engine.
I dont sell plugs but understand them well. Please understand that;
Copper is the BEST CONDUCTOR in the world.
Secondly, as the car manufacturer's have drastically improved service intervals i.e. 36,000kms or 1 year. they needed to improve the longevity of sparkplugs thats why platiniums and iradium were introduced. ONLY for LONGEVITY and no other reason.
Read the following articles available on web;
There are three basic electrode materials.
Traditional nickel-alloy electrode materials have good conductivity, but melt at a relatively low temperature and are more easily eroded. To counter the inevitable erosion, the electrode must be made large, and that means more of the combustion chamber is taken up by the electrode.
Platinum is equivalent to traditional materials in its conductivity, but has a much higher melting point and resists erosion much better. The platinum center electrode can be made much smaller, which promotes a stronger, smaller spark. The smaller center electrode allows more room for the flame front to propogate out away from the plug. Platinum plugs are, of course, much more expensive than traditional spark plugs.
Iridium is the king of spark plug metals. It has strength and melting temperature far higher than even platinum. The high melting point means the center electrode can be made even thinner - 0.4mm on the Denso plugs we sell (see picture). The longevity of these plugs is unsurpassed. Iridium is so hard that the electrode must be welded on using lasers; this process, plus the scarcity of the metal, contributes to the plugs' high price. But no plug will last longer than an iridium one.
Hey All
I've just installed the above spark plugs (NGK Iridium IX's) into my 1.8 FIAT Stilo, and I thought I'd give my opinion in case anyone else was thinking about it.
The long and short of it is - I'm not buying them again! Don't get me wrong, they're very good, no doubt far superior compared to the originals. However, I've been a longterm fan of Bosch Super 4's (got Stu DemonD to get them 
), and after taking them out and putting the IX's in, I've noticed the following:
- PRO - Improved fuel economy round town
- NO CHANGE - Acceleration is still smooth, starting warm is pretty much immediate. Took a bit longer when cold to start, but I'd just fitted them, so I'll forgive that.
- CON - Apparent loss of torque. Tried pulling away in second on a flat, car almost died! There was a flat spot when I got it that has seemed to come back.
Cost; I paid £35 delivered for the set. The Bosch Super 4's can be purchased for £15 on ebay.
I personally won't be buying them again, I shall go back to the Bosch plugs. Yes, economy will suffer, but the car seems to drive so much better and is more responsive on the Bosch plugs. And at less than half the cost, it makes sense to change them twice as much. __________________
THINK.........
