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extra horse power from fancy sparkplugs


datfreak

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I've got a old article from a hot 4's magazine that compares different "performance" spark plugs on the same motor on a dyno..

I think champian golds were the best(by a couple of KW's on a honda civic--i think)

Is there any newer dyno tests on the new style of plugs.???

ie bosch +4, denso iranim(or something) the new NGK's etc

Each of the companys have a before and after dyno graph on their own website and "claim" magical power gains ,but i'd prefer to see a independent magazine article..the companys claims seem a bit "snake oil" magic to me.

Any ideas(or tech websites???)

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Sparkplugs ignite the fuel air mixture. They either work or don't. No horsepower from "better/ faster/ hotter/ cooler/ fluffier/ prettier/ nicer" spark.

You want more power add more fuel+air/ displacement/ compression/ all the other things that cost more than $8.00!!!!

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I'm with Pancho, These "better, more horsepower" plugs have been around for 40 or more years in one form or another. Gains if there are any are so small as to not be noticeable, for their cost it is money better spent on something else.

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Get a proper set of NGKs and know you have the right plugs at the right gap for your car! Spend the money on some good wires, or a can of silicone to help out the old ones! It is amazing what can be lost throught the cracks-even the ones you can't see!

Will

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Hls30 says it best of all, get a good set of plugs (NGK) that suit the need of your car.

I run NGK coppers in my turbo application. I go one step colder then stock, and that does help contrary to what one member has said as it helps keep detonation down in my application.

If your not buring all the fuel on a N/A application and you do have the car set up to move the amount of air needed to use that extra fuel then a hotter set of plugs will work well too.

One other point HLS30 makes that is a great point too is on the wires. Bad wires and or leaking wires will seriously reduce the productivity of your plugs and ignition system.

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About the only performance aspects of plugs would be the correct heat range, gap, and to have the proper washers so that plug threads are not exposed to combustion chamber. Also so that plug is not to short (head threads exposed). Any exposed threads create hot spots that can cause detonation.

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