Thread: Best spark plugs for 2006 specv

Title says it all. I have install: cai aem and apex exhaust which is a cat back.

NGK, which is what the car comes w/ from the factory.

NGK Iridium IX is what a lot of people use, better than the stock platinums.

Originally Posted by NEMESIS

Title says it all. I have install: cai aem and apex exhaust which is a cat back.

Nissan recommends a colder plug in their shop manual for mostly highway driving and higher than normal revving. This may help reduce engine knock at these conditions (heat range 6 instead of the standard heat range 5).

NGK offers 4 grades of plugs for the SpecV. Note that the chart lists all heat range 5 plugs. Just substitute 6A for 5A to get the colder plug.

Manufacturers don't agree on a standard heat range scale. The cross reference chart allows you to compare heat range equivalents for 5 plug producers.

wats the miles on the car?

Originally Posted by westner

Nissan recommends a colder plug in their shop manual for mostly highway driving and higher than normal revving. This may help reduce engine knock at these conditions (heat range 6 instead of the standard heat range 5).

NGK offers 4 grades of plugs for the SpecV. Note that the chart lists all heat range 5 plugs. Just substitute 6A for 5A to get the colder plug.

Manufacturers don't agree on a standard heat range scale. The cross reference chart allows you to compare heat range equivalents for 5 plug producers.

This thread isn't generating a whole bunch of interest. I'm just wondering just how many of you "boosted" guys ever used or even researched the advantages of 1 or 2 step colder plugs?

^-- what does that have to do w/ this thread? majority of the boosted people have been around very very long

Originally Posted by ash

^-- what does that have to do w/ this thread? majority of the boosted people have been around very very long

The original question was very legitimate. Only two of the boosted people replied: "NGK" and "iridium NGK". I provided a little more information to make a correct choice (BTW, thanks for the acknowledgment).

I respect you and everybody else who has been around a long time. I was hoping to elicit some comments from this group regarding choosing a correct heat range plug for a given application. I too have been around for a long time - I was racing at Island Dragway in 1963 and in Englishtown when it first opened a few years later. I learned very early that the cheapest mod was correct tire pressure, good fuel, good clean oil and a proper spark plug.

I apologize if I offended anyone.

i got Denso iridium's if anyone is curious..

PULSTAR , pricey but worth it.

Originally Posted by westner

The original question was very legitimate. Only two of the boosted people replied: "NGK" and "iridium NGK". I provided a little more information to make a correct choice (BTW, thanks for the acknowledgment).

I respect you and everybody else who has been around a long time. I was hoping to elicit some comments from this group regarding choosing a correct heat range plug for a given application. I too have been around for a long time - I was racing at Island Dragway in 1963 and in Englishtown when it first opened a few years later. I learned very early that the cheapest mod was correct tire pressure, good fuel, good clean oil and a proper spark plug.

I apologize if I offended anyone.

i hear that, but the op didn't say anything about being boosted, i think those recommendations were made due to the mods that he had. damn you just made me feel young again lol

Originally Posted by Tuned_DE

wats the miles on the car?

Almost 45k.

Thanks for the help guys. The NGK Iridium IX sounds like the right choice.

I have Denso Iridium

If I remember correctly I was running a hotter plug on my boosted SR20 so the spark doesn't get blown out by the boost pressure and made a difference on the Dyno, I would've showed but gave the dyno sheets when I sold the car I went from 479.6 WHP to 487.2 WHP and the car ran smoother with the hotter plugs, this was on a Pulsar GTi-R Swap with a precision SC61 top mounted, ebay inter-cooler, ITBs, and some other goodies 8.3:1 comp.
just wanted to chime in to say PLUGS MAKE A BIG DIFFERENCE

Originally Posted by shortcut10

If I remember correctly I was running a hotter plug on my boosted SR20 so the spark doesn't get blown out by the boost pressure and made a difference on the Dyno, I would've showed but gave the dyno sheets when I sold the car I went from 479.6 WHP to 487.2 WHP and the car ran smoother with the hotter plugs, this was on a Pulsar GTi-R Swap with a precision SC61 top mounted, ebay inter-cooler, ITBs, and some other goodies 8.3:1 comp.
just wanted to chime in to say PLUGS MAKE A BIG DIFFERENCE

The purpose of a hotter plug is to keep the plug from fouling at low RPM and in stop-and-go driving. In high-revving, high compression and boosted applications the hotter plug will sometimes result in knock because the heat of the plug will fire the combustion chamber before the spark does. If this happens often enough, you will generate a 0300 code - misfire.

I use the laser-platinum heat range 6 plug for my normal driving and will probably go to an iridium heat range 7 plug once I start racing.

Originally Posted by westner

The purpose of a hotter plug is to keep the plug from fouling at low RPM and in stop-and-go driving. In high-revving, high compression and boosted applications the hotter plug will sometimes result in knock because the heat of the plug will fire the combustion chamber before the spark does. If this happens often enough, you will generate a 0300 code - misfire.

I use the laser-platinum heat range 6 plug for my normal driving and will probably go to an iridium heat range 7 plug once I start racing.

No arguement there you're right, I did do a lot of driving in NYC when I had my old 91 SE-R so that's why but even at higher revs it felt smoother when I put in the hotter plug, as for my Spec-V I'm getting my 6 heat range plugs from my Job OEM Nissan, just cuz it's cheaper for me that way

never mind........... LOLS

who stole your sig?

For the NGK IX Iridium, what p/n? There are numerous on the Advance Auto website. Maybe some of them are colder than others, not sure. If not I was going with what shows up as "replacement" for this engine