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NGK SPARK PLUG IRIDIUM Anyone use them
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Author:  NG [ Sat Apr 02, 2011 11:48 am ]
Post subject:  NGK SPARK PLUG IRIDIUM Anyone use them

Anyone use them on your mini? How have you found them?

Currently have bp6 range

Author:  NG [ Sat Apr 02, 2011 12:02 pm ]
Post subject: 

Just had a read, nothing special except
Longer service periods..???

I'll may as well stick to normal ones, unless they really take advantage
Of my electronic ignition?

How long do normal plugs last?

Author:  phillb [ Sat Apr 02, 2011 12:22 pm ]
Post subject: 

NG wrote:
Just had a read, nothing special except
Longer service periods..???



Yeah my 2000 Pajero has them in the rearmost plugs apparently because they are difficult/impossible to reach without removing a whole pile of stuff from the engine.

Author:  Drewie [ Sat Apr 02, 2011 1:40 pm ]
Post subject: 

I think they are mainly used for their long life so used where the plugs are difficult to access, my V8 SS Commodore has Platinum plugs which are another long life plug and they have a change interval of 80,000 km,
I have done 72,000 km on them now and they are still running perfectly.
They are expensive though, some thing in the region of $20 a plug, from what I have read.

Author:  LS1380 [ Sat Apr 02, 2011 3:23 pm ]
Post subject: 

Yes I use them,have done for about three years now.
I use the IW20 the heat range is good(thats the Nippon denso product.)
Just don't drop them when you are installing them :cry:

Author:  kirby [ Sat Apr 02, 2011 4:24 pm ]
Post subject: 

They are a better plug not only do they last longer but they put less strain on your ignition system and they last longer.

The Bosch brand also has 4 cathode terminals which is like indexing your spark plug but without the work and in theory should through the spark further.

In short Id probably have to be running short on other mods to drop $20 a plug into the mini.

Author:  Monaco [ Sat Apr 02, 2011 8:44 pm ]
Post subject: 

Apparently, long life platinum plugs produce less HP than standard plugs and that they were only used to reduce the service interval on cars to make the running costs look better in new car sales and where replacing plugs is difficult.
I have heard you can gain HP on the dyno by using regular plugs in engines that are specified to run platinums? Anyone know more?

Author:  drmini in aust [ Sat Apr 02, 2011 9:08 pm ]
Post subject: 

My AUII Futura had Iridiums in it when bought. Fuel economy was poor and the cruise control used to surge.
I pulled them out and found all the gaps had worn to .080". I closed them up to .040" and the econimy came back, car ran great again.
So I binned them and put standard NGKs in, these have done about 30,000km now so I should probably fit another set.

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