spark plugs

[(RIP) Kaister]

All this talk about 'brisk' spark plugs got me thinking. From what i can tell, they are an earth prongless plug replaced with peripheral earth electrode - ie they can spark from the centre to anywhere around the body along the path of least resistance .

What they won't do is provide more sparks per firing stroke - you only get one chance. They may give a 'fatter' spark, due to less resistance, i suppose.

So - what i'm getting to is - i'm not prepared to pay the price or service interval for these plugs. What i want is the multi-electrode plug made by NGK as sold by Halfords or similar.

Anyone tried these or know where to get them ?

Phil

 

[cookie]

i mentioned same rule of physics here, i think but someone produced a photo of one of these plugs sparking all over the shop at once and my argument fell apart

dunno how they get round one of the most basic rules of electricity. a cynic might suggest photoshop. not me though, oh dear me no, i've been here before

 

[jdtg06]

i mentioned same rule of physics here, i think but someone produced a photo of one of these plugs sparking all over the shop at once and my argument fell apart

dunno how they get round one of the most basic rules of electricity. a cynic might suggest photoshop. not me though, oh dear me no, i've been here before

More likely they use a different power source to create multiple sparks within the duration the shutter is open. Way I see it, 1 fat spark or 3 thin ones, the coil is still delivering the same amount of energy, only the distribution is changing.

 

[cookie]

i cannot decide whether you are being serious or taking the piss.

different power source

shutter

 

[jdtg06]

I'm being serious. A photo of a spark plug tells you very little. Say for example you hooked a spark plug up to this tesla coil here ... http://nic.funet.fi/pub/sci/electrical/tesla/pictures/rq/rq_e800.gif
the pictures would be mighty impressive but they would tell you very little about how good the spark plug is

The shutter I was reffering to was the shutter on the camera takling the photo, if you have an ignition system simulating an engine running at 6000 rpm, thats 6000/60 = 100 sparks a second (assuming wasted spark system like airheads). So if the camera shutter is open for 250th of a second you will capture a picture of ~25 seperate sparks.

 

[jdtg06]

No you won't, not with those numbers, I meant 1/4 second, 250 milliseconds. And that is why I am not an accountant

 

[cookie]

ahh, i see now. too early in the morning for me. sorry.

i only have an airhead. maybe they fit tesla coils to oilheads

 

[(RIP) Dennis]

I don't know the answer to that one either, but I can tell you that on the recent 3 Peaks challenge with five GS's I was constitently using less fuel whilst running Brisk plugs. I am now easily getting 210-220 before the warning light come on, whereas before fitting said plugs it was usually 190 -200.

Seems good value to me.

 

[jdtg06]

I would give them a go to see what happens just out of curiosity, but I can't find them for the airhead motor.

 

[boxer]

jdtg06

Email Brisk support.

If they respond as quickly for you as they did for me you should have an answer when you get up tomorrow.

Russ

 

[jdtg06]

Thanks boxer, nice one. I'll post their reply in the airhead section in case anyone else wants them.