Denso spark plugs

Technical Area Engine, Transmission, Exhaust etc
2

 

Has any one used the Denso 0.4mm electrode Iridium spark plugs,they are supossed to give 5% better fuel economy over standard plugs, this may be due to the size  of the electrode ads some plugs are 0.7 mm and 2.5mm.

It is claimed that the Denso Iridium plugs have a service life of 60k.So why is the electrode so slim the smaller the size the larger the electrical field strenght of the electrode and this reduces the the voltage required for sparking the flame kernal then grows incredibly rapidly improving the ignitability decreasing the ther cooling efect on the electrode and increasing the compression ratio. delivering a quicker combustion compared to normal plugs

As the combustion spreads throughtout the entire combustion chamber within .0004 seconds after spark discharge as a normal plug on fill a fraction of the combustion chamber in this time, I may look around to find these plugs and give them ago any thing that save money and gives a little more power can’t be all bad.Its also claimed by Denso that the customer should see financial payback within about six months of purchase contact   http://www.carsparkplugs.com for more details.

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3

I’ve not tried them, but I seriously doubt we could get 5% mpg improvement just by changing sparkplugs.

It would be interested to see the results if anyone tries them, though I hope they’ll record mpg for several tankfuls before and several more after.

4

Also try hitting occasionally so we don’t get a headache reading your post.

Unless that whole thing was cut and paste, in which case stick it in quotes and blame the guy who wrote it.

5

 Its apparantly the way in which the fuel is ignited to give a more efficient burn of the fuel and a more intense spark, that how I see it. sorry for the print I could read it ok Upgrade your email with 1000's of emoticon icons I took what I thought was the best points of the artical and posted.











6

[;)]

 

7

 Nicely done mate Upgrade your email with 1000's of emoticon icons

8

For a naturally aspirated car I really doubt whether you’ll do any better than the OEM  V-grooved plugs made by NGK. If however you’re running a supercharged or turbocharged engine, especially one at the higher end of the power range, say, 225+ HP, then plugs with smaller electrodes can be a real advantage as they make it easier to ignite the (much) denser mixture.

In the case of the MX-5, with it’s waste-spark ignition system you really need plugs with  precious metal electrodes on both sides of the spark, otherwise you will find two plugs wear out much quicker than the others. This isn’t a problem with cheap. copper plugs as they’re swapped every 10k miles or so, but with the extra cost of the iridium (or platinum) plugs it’s worth doing it right.

9

 Fitted stock so I wouldn’t know about any improvements but they are still fine after almost 50,000 miles. The Denso number I have is SK16PR-F8 but I cannot find an importer.

10

G’day Boris, I’ve searched all over the net here in Australia and can’t find them, in fact Denso don’t list that number. Maybe a Mazda dealer as a last resort. If you want me to, just let me know. Precisely what is your car model called?