JinDIESEL

anyone with experience in using both NGK iridiums and NGK platinums, could you voice your opinions in terms of performance and gas mileage issues?

[ taken from sparkplugs.com ]
Iridium is a precious metal that is 6 times harder and 8 times stronger than platinum, it has a 1,200=F higher melting point than platinum and conducts electricity better. This makes it possible to create the finest wire center electrode ever. Prior till now, spark plug manufacturers have favored platinum for their long life or performance spark plugs due to its high melting point, also the technology did not exist to machine and bond iridium on a spark plug electrode(at least in a cost effective manner). Champion spark plugs had already made an iridium industrial application spark plug, but it still sells for over a hundred dollars per plug. Just now is the technology available to effectively use iridium in a spark plug for automotive applications. The strength, hardness and high melting point of iridium make it very well suited for a fine wire plug. The primary iridium plug manufacturers at this time are Denso with a 0.4mm center electrode and NGK with a 0.7mm center electrode. Both are the best performance plugs on the market for traditional automotive use and many racing applications.

everyone says to get the stock NGK platinum plugs for the ITR, but after reading the article, it made me think. the NGK iridium (IFR6E-11) or the platinum NGK (PFR6G-11)?




Modified by JinDIESEL at 1:36 PM 9/10/2004

JinDIESEL

and they both cost the same. iridiums, or platinums?

iperez

I have Denso IK20 Iridiums on my R and I am very happy with them. I noticed better torque and nicer idle with these. I can't talk about NGKs but I am definitely getting a new set of Denso's when the time comes .. BTW, NGKs are MUCH cheaper than Densos..

Doctor CorteZ

why not just use 2 dollar NGK-resistor plugs and be done with it.

I've never seen any of these gimmick plugs make any more power than a fresh set of cheapy resistors.

PatrickGSR94

iTrader: (1)

I've always known copper to be the best electrical conductor. I use NGK copper plugs in my GS-R (BKR6E-11). They don't last very long (10K-15K miles) but at $8 for a set of four, who cares, it only takes 5 minutes to change the plugs anyway.

The only time I would want to spend the money on a very long last spark plug is if my engine had extremely difficult to change the plugs, like my brothers 4-cyl. Range with 8 plugs, or Toyota FWD V6 engines which require removal of the entire intake manifold to access the rear 3 plugs.

jmk2888

I use NGK PFR7G-11 on my 96 JDM ITR Motor. That's what it comes with stock so I just replace them with the same ones. They are actually 1 heat range lower due to 11.1 compression.

So far so good.....

ultimatehonda

I am using the NGK Iridium plugs...they are hella cheaper then the platinum....I have no idea why but so far so good

Nvious R

i believe that spark plugs don't really make a real big difference power wise untill you get into turbo applications or higher compression situations. it would make the car run smoother i guess but its not like you're misfiring with either plugs, they both fire off at the same time and ignite the same air fuel mixture. I really don't think it makes a difference. Stock ones are fine

DutchITR1689

<TABLE WIDTH="90%" CELLSPACING=0 CELLPADDING=0 ALIGN=CENTER><TR><TD>Quote, originally posted by ultimatehonda &raquo;</TD></TR><TR><TD CLASS="quote">I am using the NGK Iridium plugs...they are hella cheaper then the platinum....I have no idea why but so far so good </TD></TR></TABLE>
There are 2 types of Iridium plugs. One has Iridium tip but normal ground electrode (NGK Iridium IX).
The other one has Iridium tip + platinum ground electrode (NGK Laser Iridium). This one costs the same as the double platinum stock ones (platinum tip + plat. ground).

Electrical conduction is not the only thing that is important with plugs. Heat resistance and heat transfer is also important (pre-ignition, misfire etc). Especially when you track your ITR. For a "normal" engine with low compression, copper is fine.





Modified by DutchITR1689 at 1:33 PM 9/11/2004

Nvious R

Looks like the LSD didnt' effect this brain child.
Very informative

DutchITR1689

Go to bed!

Nvious R

<TABLE WIDTH="90%" CELLSPACING=0 CELLPADDING=0 ALIGN=CENTER><TR><TD>Quote, originally posted by DutchITR1689 &raquo;</TD></TR><TR><TD CLASS="quote">Go to bed!</TD></TR></TABLE>

Starbucks Owned me tonight/this morning. LoL

you see the massive response ownage on both pages huh? LoL

Mike K

copper is a better conductor of electricity, and for the price of platinums you can supply your engine with plugs for like 2 years.

NGK ZFR6F-11 is a good choice for mildly modded engines.

NiceDc2r

Denso IK20...I noticed smoother idle, better accel, and better gas mileage compared to the NGK double platinum...The motor just felt like it was runner a lot better with the Denso...I will never go back to platinum

Tweakmeister

I've run:

BERU Silverstones
NGK Copper
Rocket Autolite
NGK Laser Platinum

For the money you can't beat the Laser Platinum. Iridiums are probably fine too, never saw the need to try them.

DutchITR1689

<TABLE WIDTH="90%" CELLSPACING=0 CELLPADDING=0 ALIGN=CENTER><TR><TD>Quote, originally posted by NiceDc2r &raquo;</TD></TR><TR><TD CLASS="quote">Denso IK20...I noticed smoother idle, better accel, and better gas mileage compared to the NGK double platinum...The motor just felt like it was runner a lot better with the Denso...I will never go back to platinum</TD></TR></TABLE>
You are probably comparing new Denso plugs with used NGK plugs.
How old were those NGK plat. plugs?
I also noticed smoother idle, better accel. and better mileage when I put new NGK stock plugs in my ITR.....

NiceDc2r

They were replaced by the previous owner 2 days befor i baught the car...I drove the car from oakland to San diego and put the denso's ( I loved them in my b16 eg) in a week later when i did the 30,000 mi. tune up

DutchITR1689

I was looking for the Iridium eq. for the stock JDM/Euro (=S2000 plug) plug NGK PFR7G-11, but NGK is not making the IFR7E-11 (Iridium tipped center electrode + plat. tipped ground) version.
The only Iridium eq. is the Denso IK22 but this one only has a Iridium tip on center electrode but no platinum tip on the ground.

http://www.sparkplugs.com/resu...86402

NiceDc2r

Denso = IK20

DutchITR1689

<TABLE WIDTH="90%" CELLSPACING=0 CELLPADDING=0 ALIGN=CENTER><TR><TD>Quote, originally posted by NiceDc2r &raquo;</TD></TR><TR><TD CLASS="quote">Denso = IK20
</TD></TR></TABLE>
Yeah, that's for the USDM ITR which uses PFR6G-11.
Not for JDM/Euro ITR. We need a #7 plug PFR7G ----&gt; Denso IK22 (but no plat. ground)

Oh ****, I found it. The Iridium version of the PFR7G is just the IFR7G-11 = stock plug of the RSX type S


Modified by DutchITR1689 at 1:06 AM 9/12/2004

hadboosttroy

Aren't the stock platinums good for 60k or some rediculous figure? Im at 33k on my gsr with the stock plugs and its great, and don't the type r's use the same plugs?

ultimatehonda

QUOTE=DutchITR1689]
There are 2 types of Iridium plugs. One has Iridium tip but normal ground electrode (NGK Iridium IX).
The other one has Iridium tip + platinum ground electrode (NGK Laser Iridium). This one costs the same as the double platinum stock ones (platinum tip + plat. ground).

Electrical conduction is not the only thing that is important with plugs. Heat resistance and heat transfer is also important (pre-ignition, misfire etc). Especially when you track your ITR. For a "normal" engine with low compression, copper is fine.

Modified by DutchITR1689 at 1:33 PM 9/11/2004[/QUOTE]

How long do these iridium tip plugs last?[

civicsiboyboy

iridiums!!!

DutchITR1689

<TABLE WIDTH="90%" CELLSPACING=0 CELLPADDING=0 ALIGN=CENTER><TR><TD>Quote, originally posted by ultimatehonda &raquo;</TD></TR><TR><TD CLASS="quote">How long do these iridium tip plugs last?</TD></TR></TABLE>

According to Honda, they should last 110,000 miles in the RSX Type S.

len

<TABLE WIDTH="90%" CELLSPACING=0 CELLPADDING=0 ALIGN=CENTER><TR><TD>Quote, originally posted by PatrickGSR94 &raquo;</TD></TR><TR><TD CLASS="quote">I've always known copper to be the best electrical conductor. I use NGK copper plugs in my GS-R (BKR6E-11). They don't last very long (10K-15K miles) but at $8 for a set of four, who cares, it only takes 5 minutes to change the plugs anyway.

The only time I would want to spend the money on a very long last spark plug is if my engine had extremely difficult to change the plugs, like my brothers 4-cyl. Range with 8 plugs, or Toyota FWD V6 engines which require removal of the entire intake manifold to access the rear 3 plugs.</TD></TR></TABLE>

Agreed, spark plugs should be treated like oil changes.