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Old 16-09-2009, 07:32 PM   #1
falzoony
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Default Spark Plug Advice

Anyone used denso iridiums in their 6cyl?
Was looking at these and was gonna hit buy it now but thought I should ask my fellow forum users for their opinion.

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Old 16-09-2009, 07:48 PM   #2
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They are a pretty good plug apparently, but if you go to Toyota, and quote that part number, I think youll find they are like $4 a plug, could be worth it to save a few quid.
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Old 16-09-2009, 08:40 PM   #3
azza11
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http://www.fordforums.com.au/showthread.php?t=81894

This is my XY wagon, has been in the in the build section of Xtreme fords.

Its on a rottiserie at the moment, been sandblasted inside outside. Chassis rails moved inboard 3"s each side. Have 15.5"s room there now. Had nice convos to, (Doh stolen now) Have some RRS gear that may go in, brought the cheaper stuff first, lower control arms, billet strut caps, shock tower notch kit. Decided on BBF 557 to be exact, brought plates last night. Have to notch the towers now. Also about to buy a 4" cowl scoop. Need a bare block and power glide to dummy up.
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Old 16-09-2009, 08:54 PM   #4
TE029
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Quote:
Originally Posted by falzoony
Anyone used denso iridiums in their 6cyl?
Was looking at these and was gonna hit buy it now but thought I should ask my fellow forum users for their opinion.
In my opinion cant go to wrong with the motorcraft Iriduim plugs unless it is a fairly heavily modified unit or on gas etc.
At least that way the heatrange will be spot on and the plugs will run clean,
Rather than denso iridium potentially designed and heatranged for different engine...
"Performance" iridiums are a but of a toss in my opinion as any iridium needs smaller gap and more voltage to jump than Standard plugs.
Probably get stronger spark out of standard plugs aka series 1 but trade off need to replace them every 40,000km's

Spend the money you save on a set of good quality leads instead.
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Old 16-09-2009, 09:04 PM   #5
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Jim Mock do autolites from the states, thats what Brendan told me.
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Old 17-09-2009, 04:46 AM   #6
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Quote:
Originally Posted by TE029
In my opinion cant go to wrong with the motorcraft Iriduim plugs unless it is a fairly heavily modified unit or on gas etc.
At least that way the heatrange will be spot on and the plugs will run clean,
Rather than denso iridium potentially designed and heatranged for different engine...
"Performance" iridiums are a but of a toss in my opinion as any iridium needs smaller gap and more voltage to jump than Standard plugs.
Probably get stronger spark out of standard plugs aka series 1 but trade off need to replace them every 40,000km's

Spend the money you save on a set of good quality leads instead.

There are Denso iridiums made for our cars, plenty of people have run them before (FS5, me).
In saying that I have found no difference between a $120 a set plugs to my now $20 a set plugs.
I get my plug leads from QLD ignition leads. Made to order, 9mm spiral wound core, in any colour, $85, and they will post as well.
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Old 17-09-2009, 09:42 AM   #7
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Quote:
I get my plug leads from QLD ignition leads. Made to order, 9mm spiral wound core, in any colour, $85, and they will post as well.
QFT. Best leads ever. I run them on all my cars, so do my mates, so does my brother. Best leads ever.
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Old 17-09-2009, 03:20 PM   #8
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In the end with mucking around with plugs for a while ... i ended up going back to standard plugs ... in an EGAS engine.

The reason being there was little to do difference in them ... except the price .... and they are pretty eas to change .. it worked out cheaper to replace standard plugs every 50,000km (I could get actually get that much out of them on LPG) .... than to replace Iridiums every 100,000km .... and sometimes they'd need replacing prior to that.

As for leads ... QLD Ignition leads are excellent as well for the $$$$$.
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Old 17-09-2009, 05:00 PM   #9
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Quote:
Originally Posted by Mr Hardware
QFT. Best leads ever. I run them on all my cars, so do my mates, so does my brother. Best leads ever.
Yep... I use them as well
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Old 17-09-2009, 06:20 PM   #10
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I am going to buy a set of the QFT leads.
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Old 17-09-2009, 06:27 PM   #11
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On both my AUs I use stock NGK plugs and change them once a year. Cheap and easy to do. They both run stock leads also.

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Old 17-09-2009, 07:20 PM   #12
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i have had the autolite plugs from jmm in our xr6 for over 4 years and they are still going strong........... obviously now i have typed this one will crap itself any day lol
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