View Poll Results: Platinum PFR7G-11S OR Iridium IFR7G-11KS?
Voters: 39. You may not vote on this poll
NGK Spark Plugs
#1
NGK Spark Plugs
I know im If the Iridium is supposed to be a far more rare metal than platinum, why is the Platinum PFR7G-11S about the same $$ per plug. At least at the auto parts store.
#2
I can't get this across in a poll, so here is my opinion. If you are the type to install your plugs and don't look at them for 100k miles go wtih the stock platinums, they will last longest before the gaps increase. They are expensive because you have platinum on both ends.
If you don't mind pulling the plugs every 1-2 years to inspect and adjust and replace when necessary, then I like the slight performance increase of an Iridium plug. You get a thin yet strong center electrode and a tapered ground electrode - the NGK IX Iridium series. I run them in my S2k, and I will run them close to the maximum gap .043" as I'm checking them on a regular basis. The other plugs will start at the lower end of the gap spec which gives them time to grow (widen)
If you don't mind pulling the plugs every 1-2 years to inspect and adjust and replace when necessary, then I like the slight performance increase of an Iridium plug. You get a thin yet strong center electrode and a tapered ground electrode - the NGK IX Iridium series. I run them in my S2k, and I will run them close to the maximum gap .043" as I'm checking them on a regular basis. The other plugs will start at the lower end of the gap spec which gives them time to grow (widen)
#5
Originally Posted by JFUSION,Dec 13 2010, 07:56 AM
I can't get this across in a poll, so here is my opinion. If you are the type to install your plugs and don't look at them for 100k miles go wtih the stock platinums, they will last longest before the gaps increase. They are expensive because you have platinum on both ends.
If you don't mind pulling the plugs every 1-2 years to inspect and adjust and replace when necessary, then I like the slight performance increase of an Iridium plug. You get a thin yet strong center electrode and a tapered ground electrode - the NGK IX Iridium series. I run them in my S2k, and I will run them close to the maximum gap .043" as I'm checking them on a regular basis. The other plugs will start at the lower end of the gap spec which gives them time to grow (widen)
If you don't mind pulling the plugs every 1-2 years to inspect and adjust and replace when necessary, then I like the slight performance increase of an Iridium plug. You get a thin yet strong center electrode and a tapered ground electrode - the NGK IX Iridium series. I run them in my S2k, and I will run them close to the maximum gap .043" as I'm checking them on a regular basis. The other plugs will start at the lower end of the gap spec which gives them time to grow (widen)
I cannot tell the difference between plugs.
#6
Originally Posted by rob-2,Dec 13 2010, 02:32 PM
I'm under the impression both go the same distance.
I cannot tell the difference between plugs.
I cannot tell the difference between plugs.
The Iridiums I use are NGK BKR7EIX-11, they have a tapered ground electrode along with a thinner ultra-fine .6mm Iridium center electrode designed for the best performance. They don't have platinum discs on the ground electrode, hence changing them every few years is needed.
#7
I have put 100k miles on NGK Iridium plugs and the center electrode was just like new after 100k miles, the ground electrode was almost gone(non-platinum). Great plugs.
ROD
ROD
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#8
I always assumed iridiums were a fair price difference. Is the benefit of ix plugs the longevity or performance? From a harder metal and smaller electrode equals better combustion?
What gains did you notice?
What gains did you notice?
#9
Originally Posted by starchland,Dec 14 2010, 08:21 AM
I always assumed iridiums were a fair price difference. Is the benefit of ix plugs the longevity or performance? From a harder metal and smaller electrode equals better combustion?
What gains did you notice?
What gains did you notice?
I use the IX series plugs in hopes of getting a better performing plug, I like the design of the plug, and I'm willing to change them every few years. When I put these plugs in my engine they replaced the 7 year old factory plugs, which had gaps opened up to well over .051" after 55k miles. My car definitely performed better but I'm comparing new plugs with old plugs. I don't want to promise any definite gains but the design of the plugs are designed to improve performance, much like Denso Iridiums (which use the thinnest centre electrode in the market). I also like Champion Iridium plugs which are designed similarly to the NGK IX plugs, but Champion's heat ranges seem more confusing to me so I'll stick with NGK where you can stick with heat range 7 and be sure of it.