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anybody else used these?

if so what are your views...

think ive got the raw deal....yet again

brook shaw wrote:anybody else used these?

if so what are your views...

think ive got the raw deal....yet again

..u sound sceptical ??.. why would u wanna use anything other than champion or ngk ??.... foxy52

sound like a snake oil purchase to me.....

they look like fun to gap

whats "snake oil " rich?

foxy52 wrote:

brook shaw wrote:anybody else used these?

if so what are your views...

think ive got the raw deal....yet again

..u sound sceptical ??.. why would u wanna use anything other than champion or ngk ??.... foxy52

ehem...

bought a trade pack of 30

looks like im off to my motor factors for some ngk i think....

on 3 cars ive fitted em to there is a horrendous mid range misfire

stick some 50 yr old champion n5 plugs in,,,which are worn out by the way,,the cars run very sweetly

tried to ring em for 2 days to no avail...

waste of money........

brook shaw wrote:whats "snake oil " rich?

http://en.wikipedia.org/wiki/Snake_oil

i shud have known better

NGK 's will always work well , We have had nothing but problems using Champion , brilliant many years ago BUT not so of late .
G

They are nothing new I remember seeing a very similar plug in the early 80's. Even then they were ancient stock in my old boss's country garage.

it could have somthing to do with the fact you drive em at 85mph all day lol

Hi spud you ok

The spark jumps from the earth electrode to the centre electrode (electrons flow from battery negative to battery positive).
Sparks also like to jump from sharp edges/corners.

So I presume that is the thinking with this style of plug.

But it might be that those sharp corners become too hot / incandescent, and cause pre-ignition, hence the mis-fire. Maybe the shrouding effect they cause on the centre electrode also makes that hotter, so that a 'colder' plug is required. -But the company should be aware of that and allow for it.

Either way, as everyone says, I think it's better to use normal plugs. (And file the end face of the earth electrode to give a square, sharp corner).

-Personally, I always prefer Champion or Bosch. I have found that NGK, while initially superior to Champion, seem to 'go off' sooner.
-In as little as 4000 miles in some of the engines I've had (no idea why, magic probably )

andy1071 wrote:The spark jumps from the earth electrode to the centre electrode (electrons flow from battery negative to battery positive).
Sparks also like to jump from sharp edges/corners.

So I presume that is the thinking with this style of plug.

But it might be that those sharp corners become too hot / incandescent, and cause pre-ignition, hence the mis-fire. Maybe the shrouding effect they cause on the centre electrode also makes that hotter, so that a 'colder' plug is required. -But the company should be aware of that and allow for it.

Either way, as everyone says, I think it's better to use normal plugs. (And file the end face of the earth electrode to give a square, sharp corner).

-Personally, I always prefer Champion or Bosch. I have found that NGK, while initially superior to Champion, seem to 'go off' sooner.
-In as little as 4000 miles in some of the engines I've had (no idea why, magic probably )

..."Champion the wonder horse ".. ill never use anything diff... but can u plse elaborate on this fileing the end face of the earth electrode plse ?? makes sense but i have never heard of it,whereas on an old plug ill take it out and lightly wire brush all of the end of the electrode ??!! ta foxy52...

Foxy, you shouldn't be wire brushing plugs either. Scratch marks from the wire can cause tracking. Scrape the carbon off or blast them.

Al

you file the tip square to the center of the electrode as you will notice most electrodes are long. sparks like to jump to a sharp eadge . i think i read it is something by david vizard ages ago.

ive used the NGK iridium and platnium plugs before and had no issues.

I think that andy1071 is correct...

This reminds me of my 'O' Level Physics!

Isn't it the electrons that move in an electrical circuit, they are
negatively charged and move "towards" the positive?

We are talking 30 years ago here, someone please help us out!

Which electrode of the sparkplug is positive or negative will depend on whether you have positive or negative ground wiring. On a positive earth car the body of the plug is positive and the centre is negative, so by Andy's theory the spark starts at the the centre electrode and leaps to the body. I'm far from expert, but I think spark propagation is more complicated than that.

Tim