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[Cliffo B]

Hello, does anyone know if fitting NGK iridium ix plugs is a good upgrade for my 3.2 v6 engine ? It was for my previos 3.0 ltr mv6 but then the original 3.0ltr plug spec is for GM twin electrode. and I tried the present 3.2ltr quad spec to my 3.0ltr engine without any improved performance, However the NGK's certainly did give a marginal improvement. :-/

[ngrainqey]

i found the denso iridium ones were better, btw cheapest internet place for them was www.sparkplugs.co.uk or whatever it is (has a blue background)

[HerefordElite]

i found the denso iridium ones were better, btw cheapest internet place for them was www.sparkplugs.co.uk or whatever it is (has a blue background)

they're £6.90 EACH on that site, i'd want some sort of improvement for that cash matey

but i am tighter than a ducks chuff

[ngrainqey]

denso iridium are right expensive anyway!
on www.europerformance.co.uk they're 13 pounds a plug!!!!?!?!? and you think 6.80 is bad?
the ngk ones are about 3 pounds wthout looking...anyway i prefere the denso plugs (got 121 out of a yaris instead of 110 lol) and 130 out of my 2.0 mega

[HerefordElite]

denso iridium are right expensive anyway!
on www.europerformance.co.uk they're 13 pounds a plug!!!!?!?!? and you think 6.80 is bad?
the ngk ones are about 3 pounds wthout looking...anyway i prefere the denso plugs (got 121 out of a yaris instead of 110 lol) and 130 out of my 2.0 mega

plugs bring me out in a sweat - years ago i put splitfires in my chavalier sri130 and noticed no difference so took them back (30 day money back guarantee).

when i put the old ones back in i managed to cross thread them

had to get local garage to helicoil the thread with head still on, but they F&cked it up and didn't get the swarf out   so next thing you know it's running on 3 cyls and i have to take the head off a grind in a new valve!!!!!!!!

[ngrainqey]

iv never had the problem cross threading spark plugs...as of yet

[Cliffo B]

Hello, thanks for your interest and input  got more options I will now go for Denso just got 2 different price ranges to consider £7.& £9. just a bit heavy for my pocket. Still Ido love my omega!!

[ngrainqey]

Hello, thanks for your interest and input  got more options I will now go for Denso just got 2 different price ranges to consider £7.& £9. just a bit heavy for my pocket. Still Ido love my omega!!

lol! thats what us lot are here for how many plugs is 7 and 9 pounds for?

[Abiton]

1

 

[Marks DTM Calib]

Lol....just fit standard twin electrodes....

1) You will get no noticeable benefit from fancy spark plugs so stick to good quality standard ones!

2) the extra electrodes do jut one thing....extend the service life

3) There is a down side to having more electrodes.....it shields the flame front from the spark!

So for me, twin electrodes all the way and standard Vx ones at that!

[ngrainqey]

Lol....just fit standard twin electrodes....

1) You will get no noticeable benefit from fancy spark plugs so stick to good quality standard ones!

2) the extra electrodes do jut one thing....extend the service life

3) There is a down side to having more electrodes.....it shields the flame front from the spark!

So for me, twin electrodes all the way and standard Vx ones at that!

i got better top end power in my 2.0 mark

[Marks DTM Calib]

Compared to what.....a brand new Vx plug....or a 40K mile Vx plug?

This is the key thing I keep tying to point out to people....its no good comparing snake oil parts against worn standard parts  

Lets look at the physics...

The spark will jump between the centre electrode and ONE outer electrode.....it does not spark over all 4!

The resistance of the plug is bugger all when compared to many Kohms of the leads and coil.

The insulation is pretty massive when compared to the leads etc.

So HOW exactly do people see fancy plugs making a difference on standard engine setups!  

[ngrainqey]

Compared to what.....a brand new Vx plug....or a 40K mile Vx plug?

This is the key thing I keep tying to point out to people....its no good comparing snake oil parts against worn standard parts  

Lets look at the physics...

The spark will jump between the centre electrode and ONE outer electrode.....it does not spark over all 4!

The resistance of the plug is bugger all when compared to many Kohms of the leads and coil.

The insulation is pretty massive when compared to the leads etc.

So HOW exactly do people see fancy plugs making a difference on standard engine setups!  

well the "claim" on denso iridium ones is that you get a more intensive focus'd spark (because it has a very thin electrode so makes it spark better

[Marks DTM Calib]

Compared to what.....a brand new Vx plug....or a 40K mile Vx plug?

This is the key thing I keep tying to point out to people....its no good comparing snake oil parts against worn standard parts  

Lets look at the physics...

The spark will jump between the centre electrode and ONE outer electrode.....it does not spark over all 4!

The resistance of the plug is bugger all when compared to many Kohms of the leads and coil.

The insulation is pretty massive when compared to the leads etc.

So HOW exactly do people see fancy plugs making a difference on standard engine setups!  

well the "claim" on denso iridium ones is that you get a more intensive focus'd spark (because it has a very thin electrode so makes it spark better

Again....unable to say the reality behind that......it wont spark better...it might (and its a big might) spark earlier (lectric field concentrated at a samller point) but, the ECU auto adjusts the timing anyway so its not like it can offer a great deal!

IF it was on a tuned and blown engine, I might be able to see how it benefits the ignition process....but on a standard tune volume engine!

[Techno]

I'm with DTM on this I've spent years working on high performance bikes and there is no measureable improvement that you will feel on the road.  If you do/did than then plugs you had before were more than likely totally shot or the wrong type fitting these did nothing more than restore the engine performance.

As stated multi electrodes were developed for increase plug life (or equal standard plugs life of pre-ecu/injected engines) as later ecu injected engines run very much hotter with very precise fuelling making a plugs life very very hard.

You may well get the placebo affect   but that's it.