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Old 22-02-2006, 05:32 PM   #1
boodek
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Default Iridium Plugs

I've just been down to Repco to price plugs for my AU3 - they want $22 each for Iridiums, and $63 for a set of 8mm leads. Is this dear, and if so what should I pay and from where?
Thanks.

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Old 22-02-2006, 05:49 PM   #2
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JMM http://www.jimmockmotorsport.com/mai...Mail_Order.php

$90 and $90 Although they are Platinum not Iridium.
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Old 22-02-2006, 05:58 PM   #3
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"JMM" plugs can be purchased elsewhere MUCH cheaper.
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Old 22-02-2006, 06:10 PM   #4
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I'd like to stick with Iridiums, but see platinum plugs recommended a bit. What are the advantages/disadvantages of both?
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Old 22-02-2006, 06:26 PM   #5
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I have a set of newNGK Iridium plugs p/n BPR6EIX-11. for sale at $80
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Old 22-02-2006, 08:37 PM   #6
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Quote:
Originally Posted by boodek
I've just been down to Repco to price plugs for my AU3 - they want $22 each for Iridiums, and $63 for a set of 8mm leads. Is this dear, and if so what should I pay and from where?
Thanks.
There has been lots of discussion here about these plugs, some love em, some hate em!

Myself, I wouldn't pay that much for plugs that so many have said didn't do much for their car's performance.

It's your hard earned though. I see another member has some for sale. If they are so good, why would they not be in his car? Just a thought!

Not sure about the leads either, someone like JC or LG or Casper are often good with questions like that. Maybe they'll see the thread and drop in a comment.

All the best with it.

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Old 22-02-2006, 08:49 PM   #7
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Thanks for your replies. I don't want to get done buying expensive plugs when cheaper ones will achieve the same result. I await further comments!!
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Old 22-02-2006, 10:03 PM   #8
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Send a message to Useless he is the Spark Plug King! lol
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Old 22-02-2006, 10:58 PM   #9
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I've had them in before & they do last a lot longer. I got over 70,000 Kms & they were still ok out of the last set. But the cheaper standed 1's do the job as well.
The Iridium plug can tolerate a lot of heat. I would use them again when the cheap AC Delco plugs need replacing as for performance for every day driving I cannot tell any difference between any decent plug.

The NGK site will give you some better tech info
www.ngk.com.au
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Old 22-02-2006, 11:24 PM   #10
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i have them as i have an egas ute and these are the best plugs for gas as they are a colder plug, i love them
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Old 23-02-2006, 12:15 AM   #11
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Simple answer BA xr6 T plugs better than NGK $13 each. I have found them to be good (Denso irridiums). Best value the JMM plugs. I havent used them but have spoken to knowledgeable mechanics. They are autoline or autolite 985's. Casper knows what they are. I have the details at work so drop me a PM, I will let you know Thursday. The plug guru is Useless!!
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Old 23-02-2006, 01:10 AM   #12
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No comment on the plugs, as for the leads, around $60 for a set of Topgun 8mm leads is about right. I dare you to price the 8.8mm leads (I paid $130 - then found them $40 cheaper a week later - I hate that!).
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Old 23-02-2006, 08:24 AM   #13
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Quote:
Originally Posted by stiddy
Send a message to Useless he is the Spark Plug King! lol
My tests on various plugs showed the iridiums made my car quicker .The NGK brand of iridiums in my test sucked!! They made my car slower than standard plugs. The best results I had were with denso ford iridium plugs.

The worst performance came from champion plugs.

Since then Ihave purchased another new set of denso iridium plugs and the car misfired! I think that from my data that the denso iridiums are the best but you must be lucky for them to be manufactured properly. If all the manufacturers did provide a better quality standard then we would all have much better performance.

BTW Te champion plugs which I bought for my car measure 6 different resistances across each plug.This indicated to me that those plugs were not made manufactured properly.

My ngk ridiums went straight into the bin,champions went straght into the bin.

The ngk replacement for lpg and xr6 fared well at second best in my testing.ZG SOMETHING.?
All plugs were tested with gtech over 4 runs each to ensure consistent results....
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Old 23-02-2006, 09:39 PM   #14
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I still don't know which plugs to buy...
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Old 23-02-2006, 10:01 PM   #15
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after reading all that, best bet is to buy ear plugs.
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Old 23-02-2006, 10:25 PM   #16
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Quote:
Originally Posted by sourbastard
after reading all that, best bet is to buy ear plugs.

: : : but GTech never fails !
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Old 23-02-2006, 10:36 PM   #17
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boodek - buy the plugs that are made to fit the car, and which suit your budget. If you just get the standard plugs, be prepared to replace them in 10,000km or so. If you get the iridiums etc, they are supposed to be good for 40,000 plus km. I used to have Bosch Super4s in the wagon (6 cyl), and they worked fine.

Check:
www.bosch.com.au
www.ngk.com.au
www.denso.com.au
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Last edited by JC; 23-02-2006 at 10:41 PM.
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Old 24-02-2006, 08:05 AM   #18
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Get the denso iridiums.Even though 1 set wasnt good other sets over time have proven to be the best plug.I have not tried Jim Mock plugs but have heard that they are really good as well.
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Old 24-02-2006, 12:18 PM   #19
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A write up of Iridium plugs

http://www.spswebpage.com/tech/index...leID=denso_faq
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Old 25-02-2006, 09:56 AM   #20
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I just put the NGK Iridiums in the EGAS ute ... and my last set lasted me 40,000-odd km ... could have left them in longer ... but started to notice sluggish performance ... so i just replaced them ... much better now in engine response.

Might try the Ford ones next time and see if it's worth it .... if they are only $13 a plug ... then it's worth it I guess. In 6 months (40,000km) time I guess i'll find out ... hee hee
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Old 27-02-2006, 06:50 PM   #21
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Quote:
Originally Posted by Mechan1k
Might try the Ford ones next time and see if it's worth it .... if they are only $13 a plug ... then it's worth it I guess
I like your dealer better than mine...he wants $25.30 each for Iridiums, and $92 for leads!!
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Old 27-02-2006, 07:03 PM   #22
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thats a bit rich for the plugs, i got some irridiums for my XR8 for $12ea from Bursons
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Old 27-02-2006, 09:04 PM   #23
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Quote:
Originally Posted by boodek
I like your dealer better than mine...he wants $25.30 each for Iridiums, and $92 for leads!!
Leads cost me $80 for the 9mm QLD Spiral Core leads
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Old 28-02-2006, 04:55 PM   #24
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I just had my spark plugs changed at 100,000 k's. The factory ones were still in pretty decent condition, but I changed them anyhow to the NGK Iridiums to see how they went for the trip to FPV weekend.

Compared with the stockies, they sit a bit deeper in the cylinder and hence run a tad hotter. I did notice the engine ran a tad smoother, as for power and fuel economy there wasn't a great deal that I noticed much different.
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Old 28-02-2006, 05:22 PM   #25
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Quote:
Originally Posted by useless
The ngk replacement for lpg and xr6 fared well at second best in my testing.ZG SOMETHING.?.
ZGR6B-11 with the 'V' groove , not a bad plug. Its what i use in the XR and the best part about it is that a whole set costs $25.86 from AutoOne.

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Old 06-03-2006, 06:44 PM   #26
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I've ended up putting Bosch's new Super Plus "Yttrium" plug in the car - total cost about $22.80 from Burson's. This is about the same cost as one Iridium plug which did 80,000km; if these new plugs do 30,000km, I think they will be a far more economical proposition. I'll have to do another 180,000km to spend as much as one new set if Iridiums!
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Old 06-03-2006, 09:51 PM   #27
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XR8 fella what brand were the Bursons iridiums that you purchased for $12 and are they O.K.
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Old 07-03-2006, 07:13 AM   #28
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Burson's wanted $20 or more for Iridiums when I asked them last week, and they were NGK...
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Old 07-03-2006, 09:26 PM   #29
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apparently the JMM plugs give a 4 Kiliwatt gain(so they say) so even tho it sounds funny...its a performance mod :
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Old 07-03-2006, 10:53 PM   #30
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Quote:
Originally Posted by dev5 ute
apparently the JMM plugs give a 4 Kiliwatt gain(so they say) so even tho it sounds funny...its a performance mod :

A k& N filter & tickford snorkel will give you 7kw!!(some say) bwahahahah!(I love marketing) 4kw? I hope that is true though because I went for the denso irridiums which are better. I must be getting 5kw from them & with the above I have gained as much power as a good extractor /exhaust combo!!! Seriously though, the JMM plugs autolite 985's are great value as they cost less than $30 for a set of 6,or $45 from JMM.
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