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Iridium Spark Plugs For V35

siu_loong_bao
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siu_loong_bao Rising Star

siu_loong_bao

Posted
Posted

Hi all,

I am about to purchase a set of NGK Iridium IX LFR5AIX-11 Spark Plugs from the USA for the VQ35DE....Has anyone replaced their sparks with these NGKs and noticed any difference?

From experience, 3 years ago, I replaced my 1989 MX5 NA6CE with Iridium NGKs + NGK spark lead and notice a bit more response at high revs. But then again, I would think that it was more attributed to plugs + lead...and not just the plugs.

They are about $90 USD...so am I wasting money?

Also, for those interested, someone has posted a set of NGK Laser Platinum Premium PLFR5A-11 on ebay for the VQ35DE for $99 or something like that....But I don't think that they are iridium...

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https://www.sau.com.au/forums/topic/280164-iridium-spark-plugs-for-v35/
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siglapian Explorer

siglapian

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Posted

Are there differing levels of "coldness" to the spark plugs?

When I used to drive and modify my Subaru Forester, it was recommended to upgrade to "one step colder" spark plugs for every 50-100bhp increase. I believe Iridium is the most common upgrade, now they have Platinum or Copper tips, of the differences between these I have no idea.

xscape237 Rising Star

xscape237

Posted
Posted

I dont have any experience using them in the VQ35.

However, i've had a set in a 2JZGTE and a 4G63.

IMO they are a waste of money. Im happy paying $4 for regular copper plugs, and changing them every 5,000 - 10,000kms.

To be honest my evo felt like it went better after putting in fresh coppers (and taking out the old iridiums that were in there).

-= SKiZO =- Rising Star

-= SKiZO =-

Posted
Posted

I thought the 5's were standard? Am i wrong?

http://www.skylinesaustralia.com/forums/Ch...iy-t173667.html

6's are one step colder and I've changed mine to these just recently just for the heck of it. Can't say I really noticed the difference after 3000kays.

I know they are ridiculously overpriced at the usual automarts, but don't need to buy them from the US, buy them from Harold at http://www.performancelub.com

Top bloke, the price for 6 IX plugs has gone up to about $94 delivered though since then.

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