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Discussion Starter · #1 ·
I've recently bought NGK Irridium spark plugs <br>Anyone else tried them , are they noticeable better than stock ? ( other than in theory ? )
 

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Re: spark plugs (pasat)

I've used them in every car over the last say7 or 8 years and yes I can see some increase in MPG, a little better performance and how the engine "works" like for the S40 a common complaint is stange power at normal driving HP and speeds, hard to modulate.. I note that this seems much better with the good plugs. The s40 uses a deeper plug then most other Vovos so make sure you get the right ones.
 

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Discussion Starter · #4 ·
my dealer got them from europe , so try <A HREF="http://www.ngksparkplugs.com" TARGET="_blank">http://www.ngksparkplugs.com</A>
 

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a few quick questions... <p>1) where are the spark plugs located under the hood<br>2) is this something I can change myself or do I need to go to a dealer and let them install it?<br>3) how many spark plugs are needed? i'm asking because i thought only 1 was needed but when i went to this website to buy the spark plugs, they came in boxes of 4.<br>
 

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Re: (smartxtai)

Please don't try to change your plugs, smartxtai. Trust me on this.<p>Tom.
 

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Re: (smartxtai)

Well, both, but especially the first. If you don't know your way around the engine pretty well, you can do some significant damage even in what might sound like this simple job. Second, I doubt you'll notice a difference, and the wrong choice of plug (rather likely given the aftermarket) could make things worse too.<p>Tom.
 

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Re: (passat)

<TABLE WIDTH="90%" CELLSPACING=0 CELLPADDING=0 ALIGN=CENTER><TR><TD><i>Quote, originally posted by <b>passat</b> »</i></TD></TR><TR><TD CLASS="quote">why would you buy copper and not irridium or platinum ? </TD></TR></TABLE><p>I've read that it's possible for the iridium to chip off. I read the same thing from a few different sites. I'm sure there are many others that run it w/o any problem, but I don't want to risk it. <p>Platinum is not as a good of a conductor as copper. <p>Copper is a good and cheap but the downside is that it doesn't last long. I was planning on running copper and replacing them every time I change the oil which is at 7500 miles.<p>gdogg16 posted some of these links:<br><A HREF="http://volvospeed.com/vs_forum/index.php?showtopic=19093&hl" TARGET="_blank">http://volvospeed.com/vs_forum...93&hl</A><br><A HREF="http://volvospeed.com/vs_forum/index.php?showtopic=17782&st=15" TARGET="_blank">http://volvospeed.com/vs_forum...st=15</A><br>
 

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Copper plugs also operate at lower temperatures than Platinum or Iridium plugs. A lower temperature is supposed to give better performance. Silver plugs are supposed to operate at lower temperature than copper plugs.
 

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Re: (volvoNB)

cooper is the best but like you said, gotta change them a lot. 60 to 90K on iriduim and they look almost new. <IMG NAME="icon" SRC="http://www.vwvortex.com/vwbb/eek.gif" BORDER="0"> I've had turbocharge Acrua cars and the sub 10K sparkplug changes ummmm gotta be a real drag.<p><A HREF="http://www.ngksparkplugs.com/apps/car_truck_suv/results.asp" TARGET="_blank">http://www.ngksparkplugs.com/a...s.asp</A><p>2005 VOLVO S40 T5 2.5 L5 B5254T3 FI Turbo<p>Spark Plug Part No. Stock No. Plug Gap Photo <br>Standard BKR6ES 3783 0.028 <br>V-Power BKR6E 6962 0.028 <br>G-Power Platinum BKR6EGP 7092 0.028 <br>Laser Platinum PFR6G * 4793 0.028 <br>Iridium IX BKR6EIX 6418 0.028 <br>* Premium Laser Plug <p><br>I always had good luck with the VPower Copper plugs.<BR><BR>
<i>Modified by Oldman at 4:18 PM 7-18-2006</i>
 

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Re: (Oldman)

I went to look at Denso on their website and they list the IK20 for the S40 T5. I'm pretty sure T5 uses the same plugs as the S60R which is IKH22. I just find it strange that the manufacturer would list this incorrectly.<p>Edit:<br>I scrolled down and saw that it is listed correctly for the V50. Strange isn't it?
 

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Re: (mball)

<TABLE WIDTH="90%" CELLSPACING=0 CELLPADDING=0 ALIGN=CENTER><TR><TD><i>Quote, originally posted by <b>mball</b> »</i></TD></TR><TR><TD CLASS="quote">Copper plugs also operate at lower temperatures than Platinum or Iridium plugs. A lower temperature is supposed to give better performance. Silver plugs are supposed to operate at lower temperature than copper plugs. </TD></TR></TABLE><p>Low temperature has little to do with running "better". Basically you want the hottest plug possible, but hot plugs can cause detonation (pre-igition). You want the plug to be matched to the needs of the engine, and also the way you drive it. There's a range, but not a really wide one.<p>Iridium plugs are good because you can have a teeny tiny tip, which holds very little heat. Also, the sharp point emits a really good spark. The metal is stable and doesn't erode under the stress of the cylinder.<p>Copper is good because it's a good conductor, and a good heat dissipator. The tip itself isn't copper, but the plug's core is. The copper pulls heat up the plug, getting it away from the tip, where it can cause trouble.<p>You can have an iridium plug with a copper core. For all I know the Denso plugs have this. I haven't looked into them much. Personally, I think the stock plugs are fine. But I could be convinced otherwise.<p>Tom.
 

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Re: (tmtalpey)

The last time I was trying to diagnose issues with my old SAAB I found this page to be very informative:<p><A HREF="http://www.ngksparkplugs.com/techinfo/spark_plugs/techtips.asp?nav=31000&country=US" TARGET="_blank">http://www.ngksparkplugs.com/t...ry=US</A><p>Many SAABs required (or really, really wanted) the original equipment NGK plugs because the plugs were actually part of the ecu sensor circuit.<p>That said, I can see no obvious reason to use something other than what the manufacturer recommends. Spark plugs, premium or otherwise, are not a significant expense to a car maker. If the super-de-duper ti-platinum kryptonite plug yields 20% better mileage or enhanced performance don't you think that the (smarter than me) automotive engineers at Volvo would spec them? The marketing benefit that comes with improved mpg or performance specs. would far outweigh the additional cost of 5 premium plugs.
 

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Re: (volvoNB)

<TABLE WIDTH="90%" CELLSPACING=0 CELLPADDING=0 ALIGN=CENTER><TR><TD><i>Quote, originally posted by <b>volvoNB</b> »</i></TD></TR><TR><TD CLASS="quote">I went to look at Denso on their website and they list the IK20 for the S40 T5. I'm pretty sure T5 uses the same plugs as the S60R which is IKH22. I just find it strange that the manufacturer would list this incorrectly.<p>Edit:<br>I scrolled down and saw that it is listed correctly for the V50. Strange isn't it?</TD></TR></TABLE><p>With the BSR kit use IK22 if they are available for that engine.
 

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Re: (jackf)

<TABLE WIDTH="90%" CELLSPACING=0 CELLPADDING=0 ALIGN=CENTER><TR><TD><i>Quote, originally posted by <b>jackf</b> »</i></TD></TR><TR><TD CLASS="quote">That said, I can see no obvious reason to use something other than what the manufacturer recommends.</TD></TR></TABLE><br>From a technical perspective, the only real reaon would be if you consistently drive your car in a specific performance range. The stock plug is selected for a wide-range profile, that will fire well, resist fouling and prevent preignition in general.<p>If (for instance) you race the car and drive it constantly at 4000-5000rpm+, you'll need a colder plug, to prevent overheat and preignition under heavy load. Conversely, if you drive like a granny, you may need a hotter one.<p>One risk worth mentioning is, because preignition is usually the first indicator of a too-hot plug, and the car senses it way before you do, it will pull timing and suppress it no matter what plug you put in. Therefore, you'll risk robbing the very performance you wanted, and not even know it. Just food for thought...<p>Tom.
 

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Re: (jackf)

by that logic we would all be using metal champion plugs, as NGK copper was out a LONG LONG LONG time before OEMs started using them, then groove or slotted designs were out a long long long time before OEMs started using them, then platnium was out a long time before OEMs used them and then iridiums have been out for a while before some OEMs use them. So why change anyting on the car <IMG NAME="icon" SRC="http://www.vwvortex.com/zeroforum_graphics/screwy.gif" BORDER="0"> IMO the car can use better oil, plugs, tires and this is true for almost every car except Toyota which has gone to iridium plugs, and maybe my Camaro which had an optional ultra highperformace tire which was OK. Try a set of PZero Nero M&S on the car to see how much better a great tire is over an OK tire.
 
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