For some time NGK and Denso have sold plugs with either a "U" grooved bent electrode or a "V" grooved center electrode. Considering these manufacturers are well respected, I assume there must be some measurable benefit to running these sparking plugs. However, can't recall reading any postings on this forum regarding the virtue of these grooves.
Is there anyone out there who can actually attest to the supposed benefit of these plugs?
I happen to be using Bosch and or Autolite for no particular reason other than both brands have served me well. Neither offer the "groovy" style plugs. Anyone take their tiny die grinder with jeweler's bit to cut a "v" groove in their plugs? Is it worth the effort?
Thank you in advance.
Date: 5-10-08 07:13 From: WH in White Salmon Subject: Re: Sparking plug modifications?
I think the answer is basically NO.
I believe the main theory in V groove or U is that the more sharp edges you give the spark to jump to from the center electrode, the less chance you have of a miss fire in the combustion process. When outer electrode rounds off it's edges, it takes more energy to bridge the gap, so adding more edges means you technically have a better chance of the spark always bridging. If your coil is marginal or weak, these type of plugs can help.
I myself see little reason to use them being I've never had problems with the old styles. Run the plug the car is supposed to have spec'd from the manufacturer, don't worry about fancy new plugs, if the spark ignites the mixture, it's done it's work.
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