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Guest Message by DevFuse
 

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Spark Plugs


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15 replies to this topic

#1 Reason01

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Posted 31 January 2004 - 07:40 AM

What do you guys think of Iridiums? I want either the NGK or the Denso's.......I'm leaning towards the Denso plugs. Does anyone have or tried any of the 2 plugs?

#2 91,93,94 Legacys

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Posted 31 January 2004 - 09:13 AM

Go with the Denso's. I put them in my 93 Legacy AWD Wagon, and their fantastic. Increased throttle response, fuel mileage, and overall performance. Cant beat them!:D

#3 Reason01

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Posted 31 January 2004 - 11:19 AM

Thanks, sounds good...

#4 Reason01

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Posted 31 January 2004 - 11:21 AM

What one is for the 2.5L engine? IK16 or IK20??

#5 91,93,94 Legacys

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Posted 31 January 2004 - 11:44 AM

Legacy 2.5's take IK20 Denso Iridium plugs.

#6 applegump

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Posted 31 January 2004 - 01:56 PM

The NGKs are good too. I've always used them and are easy to come by around here.

#7 blitz

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Posted 31 January 2004 - 04:31 PM

I've been running the Denso IK20 in my phase II 2.5 for about a year (10k miles). After taking a look at their condition recently, I was shocked to see that the iridium tip had become molten on two of the four plugs. Two of the tips had changed appearance from a flat, precision machined look, to a shiny little ball of slag.

I chalk it up to the long and extremely thin (.4mm) tip. Next summer, I'm going to swap them out in favor of NGK Iridium IX with a shorter and thicker (.6mm) tip to see if that remedies the situation.

I've never heard anyone else voice this complaint.

#8 ts johnson

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Posted 31 January 2004 - 06:22 PM

Just bought denso double plat plugs for the 98 leg out. Are these comparable to the iridiums?

#9 flash

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Posted 31 January 2004 - 06:36 PM

Sounds expensive. I wasn't even willing to pay for the OEM's ($10 each or whatever they were). The cheapo Autolite double platinums OEM equivalents work great in my '97 deuce-and-a-half Outback. If you were running boost, that would be another story.

#10 Reason01

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Posted 31 January 2004 - 07:12 PM

I was told Autolite plugs are trash. A friend of mine is a mechanic and owns his own shop, and said he would never use Autolite plugs. He gave me the run down on them but I dont want to make this post that long. I like to buy quailty, so what ever is best I want. So we have one guy likes the Denso's one guy dont, and we have one for the NGK's. What is the phase 2 engine?

#11 hklaine

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Posted 31 January 2004 - 07:29 PM

Anyone have suggestions on wires? I am looking to do plugs/wires soon and was curious if there was anything I should stay away from or anything I should track down? Thanks.

-Heikki

#12 blitz

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Posted 31 January 2004 - 09:12 PM

Originally posted by Reason01
I was told Autolite plugs are trash. A friend of mine is a mechanic and owns his own shop, and said he would never use Autolite plugs. He gave me the run down on them but I dont want to make this post that long. I like to buy quailty, so what ever is best I want. So we have one guy likes the Denso's one guy dont, and we have one for the NGK's.


I don't have a problem with Denso per se, I think they make a fine product. I've run their standard U-Groove plugs for almost 200,000 miles in my last car (not one set, I changed 'em regularly). I'm just making the observation that the iridium tips melted on my iridium Denso's. I think there's a limit to how thin the electrode can be made. :(

Also the Denso Iridiums are way expensive.

What is the phase 2 engine?



Phase I 2.5 = earlier DOHC version.
Phase II 2.5 = later SOHC version

#13 99obw

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Posted 01 February 2004 - 09:17 AM

I have been running the autolite platinums in my dodge for almost 30k, very happy with them. I would not run the autolites in a subaru but I see no reason to not run them in domestic makes.

I am on my third set if NGK platinums in the outback at 60k intervals with flawless performance.

#14 Reason01

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Posted 01 February 2004 - 09:27 AM

So there should be no big difference between Denso Iridium and NGK Iridium?

#15 nickb21

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Posted 01 February 2004 - 12:58 PM

There's also some pretty good info in this thread:
http://www.ultimates...=&threadid=9056

For plug wires, I'd think OEM or NGK, maybe even Bosch..

#16 timn29

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Posted 07 June 2004 - 01:02 PM

Oh boy, I wish I would have read this thread prior to installing a set of Autolite Double Platinums. I was looking to get a set of Champions, but saw the Autlolites and thought, "Double Platinum! They must be good." So, what kind of trouble am I looking at? Should I sweat it or keep 'em in? Please help.




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