spark plug equivalents

Paradigm

oldtoolie wrote: »

You don't need to replace them every year either.

Ideally they should be replaced every 12-15000 miles, unless you use the "iridium" or platinum tipped.

mikey72

Mine is 40,000 miles or 4 years.
The electrode length between twin or single is different, the spark on single electrodes is from the end down, so further into the combustion chamber. Twin sparks are sideways, so slighty further up. It matters to the injector pattern.
You can compensate by using a shorter electrode, but that changes the heat of the plug tip.
Put different ones in my 1.8 Vauxhall engine, you can get a lumpy tickover.
Or the end falls off the spark plug, into the combustion chamber.
For a fiver every 4 years, I'll put the correct ones in mine.

Paradigm

mikey72 wrote: »

The electrode length between twin or single is different, the spark on single electrodes is from the end down, so further into the combustion chamber. Twin sparks are sideways, so slighty further up.

Sorry? I think you're falling into the hype trap.

It makes no difference if there is one, 2 or more ground (side) electrodes, the gap between the centre & the ground will be specified to ensure a strong enough spark to ensure efficient combustion.
if it's sparking "slightly further up" then it's not doing what the manufacturer intended.

In the case of multi ground plugs the spark will follow the path of least resistance until that electrode has worn sufficiently to make the other electrode the better path (closer).

andygb

I use Bosch Super 4s in my Mondeo, and it runs like a dream, lovely and smooth, crisp acceleration, and better fuel economy.
You pay £4 plus per plug for a reason.

jd82

I don't get this. Spend £12 on some decent plugs which will last for 30-40k and won't wreck your coil pack or try and save £8, risk more fuel usage and damage to coil pack etc.

mikey72

Paradigm wrote: »

Sorry? I think you're falling into the hype trap.

It makes no difference if there is one, 2 or more ground (side) electrodes, the gap between the centre & the ground will be specified to ensure a strong enough spark to ensure efficient combustion.
if it's sparking "slightly further up" then it's not doing what the manufacturer intended.

In the case of multi ground plugs the spark will follow the path of least resistance until that electrode has worn sufficiently to make the other electrode the better path (closer).

Do you even know what electrode length is?
Do you know where the ground electrode is on a multi electrode plug as opposed to a single electrode?
You do realise the spark is in a totally different place?
But if you think it's hype, put in what you want to. It's your car.

Paradigm

mikey72 wrote: »

Do you even know what electrode length is?

Yes although it's irrelevent.

mikey72 wrote: »

Do you know where the ground electrode is on a multi electrode plug as opposed to a single electrode?

Yes I do know but I'm wondering if you do.

mikey72 wrote: »

You do realise the spark is in a totally different place?

Is it?

mikey72

Paradigm wrote: »

Yes although it's irrelevent.

Yes I do know but I'm wondering if you do.

Is it?

So long as you're happy.

Flying-High_2

:DSlightly off topic.....

Do red "Performance" leads give more power than blue ones?....

somech

Flying-High wrote: »

:DSlightly off topic.....

Do red "Performance" leads give more power than blue ones?....

no but the yellow ones carry more current

i cannot believe this thread, someone is asking if they can fit cheaper !!!!! single electrode plugs to save £4
bearing in mind the plugs specified for your car go through months of testing to check effeciency, life and heat cycles
go ahead and fit the wrong plugs but i bet you'll see an increase in fuel consumption poor performance and you'll change them more often.
by the way multi electrode plugs give a more focused spark between the electrode tips into the combustion chamber