NGK Ruthenium HX Spark Plugs
09-19-2019, 11:13 PM
#1
Thread Starter
NGK Ruthenium HX Spark Plugs
Anyone tried these? Thoughts and feedback in comparison to OEM PFR7's or Iridium BKR8EIX (my personal favourite thus far)?
https://ngksparkplugs.com/en/product...um-spark-plugs
https://www.ebay.com/itm/Spark-Plug-...AAAOSwi5dcqBwg
https://ngksparkplugs.com/en/product...um-spark-plugs
https://www.ebay.com/itm/Spark-Plug-...AAAOSwi5dcqBwg
09-20-2019, 07:44 AM
#2
I have them installed with Okada coil packs, on a NA car. I can't say I can tell the difference, since I had Iridium IX 7s installed(500 miles on them) before. NGK only makes heat range 7 for the S2000 at the moment though, if you want 8 or 9, you have to get Iridium IX ones. Rock Auto had the lowest price, 5% off coupon can be found on here.
NGK 92400 is the correct part # for S2000s.
https://www.rockauto.com/en/moreinfo...=9779948&jsn=1
NGK 92400 is the correct part # for S2000s.
https://www.rockauto.com/en/moreinfo...=9779948&jsn=1
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Last edited by jackmugen02; 09-20-2019 at 07:47 AM.
09-20-2019, 08:38 AM
#3
Thread Starter
I have them installed with Okada coil packs, on a NA car. I can't say I can tell the difference, since I had Iridium IX 7s installed(500 miles on them) before. NGK only makes heat range 7 for the S2000 at the moment though, if you want 8 or 9, you have to get Iridium IX ones. Rock Auto had the lowest price, 5% off coupon can be found on here.
NGK 92400 is the correct part # for S2000s.
https://www.rockauto.com/en/moreinfo...=9779948&jsn=1
NGK 92400 is the correct part # for S2000s.
https://www.rockauto.com/en/moreinfo...=9779948&jsn=1
09-20-2019, 08:39 AM
#4
Thread Starter
They don't have colder than 7 for the HX range yet as you said. The spark plug gap on the spec sheet seems to be 1mm as well as opposed to the tighter gap of the BKR8's...
09-20-2019, 10:01 AM
#5
You gap the plugs for your application, less for forced induction and the stock gap for NA. I know some say you can't gap these plugs but here is how you can gap them safely. I always check my plugs to make sure they are gapped to the right spec. and if I have to gap a plug to make it right, thats fine by me. I've been using Iridium plugs since they came out over 20 years ago. Never had one fail yet and I put 100k miles on my plugs.
https://docs.google.com/viewer?a=v&p...NmNkNTQwMjc1OQ
Any time you get a better(hotter) spark you get a hotter flame front and that burns the fuel more efficiently which means more power at WOT and better fuel mileage at part throttle or cruising on down the road.
Rod
https://docs.google.com/viewer?a=v&p...NmNkNTQwMjc1OQ
Any time you get a better(hotter) spark you get a hotter flame front and that burns the fuel more efficiently which means more power at WOT and better fuel mileage at part throttle or cruising on down the road.
Rod
09-22-2019, 11:44 AM
#6
Thread Starter
You gap the plugs for your application, less for forced induction and the stock gap for NA. I know some say you can't gap these plugs but here is how you can gap them safely. I always check my plugs to make sure they are gapped to the right spec. and if I have to gap a plug to make it right, thats fine by me. I've been using Iridium plugs since they came out over 20 years ago. Never had one fail yet and I put 100k miles on my plugs.
https://docs.google.com/viewer?a=v&p...NmNkNTQwMjc1OQ
Any time you get a better(hotter) spark you get a hotter flame front and that burns the fuel more efficiently which means more power at WOT and better fuel mileage at part throttle or cruising on down the road.
Rod
https://docs.google.com/viewer?a=v&p...NmNkNTQwMjc1OQ
Any time you get a better(hotter) spark you get a hotter flame front and that burns the fuel more efficiently which means more power at WOT and better fuel mileage at part throttle or cruising on down the road.
Rod
I'm currently NA modded but will be supercharged eventually. I'm comfortable running BKR8's in both scenarios.
09-22-2019, 01:38 PM
#7
Yeah cool. I've never gapped spark plugs previously. Never had a reason to. I've been running BKR8EIX for a long time now and felt the difference in power that you mentioned. Now I wonder if at stock gap of about 1mm will these ruthenium plugs really make the difference NGK's charts show. I'm guessing they would so I'm willing to try. It seems that they don't make heat range 8 for ruthenium plugs though...
I'm currently NA modded but will be supercharged eventually. I'm comfortable running BKR8's in both scenarios.
I'm currently NA modded but will be supercharged eventually. I'm comfortable running BKR8's in both scenarios.
Rod
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09-22-2019, 02:17 PM
#8
I like the pspe design out of the two ones they might offer, the thing with that type of design which is more of a surface gap is that it should come form the plug manufacturer pre-gapped, you don't want to alter the gap on a surface gap plug. The DFE design can be gapped easier.
I have full confidence in my ability to gap a plug safely, most manufacturers don't trust consumers so they might suggest not to adjust their gaps even if they are out of spec. If someone doesn't adjust the plug gap safely it can damage your piston or score your cylinder wall, so if you can't do it 100% safely then don't try it. Denso makes a similar design plug as the DFE, If you can get them pre-gapped then try them, if you can't get them pregapped and you aren't 100 percent sure in your ability then skip it and stick with the NGK Iridium. I wouldn't be sold on the hardness claim, all that means is that you can run them longer without wear of the electrodes, Iridium is already much harder than platinum, so it is plenty good, if this new metal is harder it isn't a big selling point with me. I do like the gap design of the PSPE plug though exposing the combustion chamber mixture to the spark like most surface gaps do. At the end of the day I doubt you would be able to tell a difference but it is worth a try if you can find the right plug for your application.
I have full confidence in my ability to gap a plug safely, most manufacturers don't trust consumers so they might suggest not to adjust their gaps even if they are out of spec. If someone doesn't adjust the plug gap safely it can damage your piston or score your cylinder wall, so if you can't do it 100% safely then don't try it. Denso makes a similar design plug as the DFE, If you can get them pre-gapped then try them, if you can't get them pregapped and you aren't 100 percent sure in your ability then skip it and stick with the NGK Iridium. I wouldn't be sold on the hardness claim, all that means is that you can run them longer without wear of the electrodes, Iridium is already much harder than platinum, so it is plenty good, if this new metal is harder it isn't a big selling point with me. I do like the gap design of the PSPE plug though exposing the combustion chamber mixture to the spark like most surface gaps do. At the end of the day I doubt you would be able to tell a difference but it is worth a try if you can find the right plug for your application.
09-22-2019, 09:48 PM
#9
Thread Starter
09-22-2019, 10:10 PM
#10
Thread Starter
I like the pspe design out of the two ones they might offer, the thing with that type of design which is more of a surface gap is that it should come form the plug manufacturer pre-gapped, you don't want to alter the gap on a surface gap plug. The DFE design can be gapped easier.
I have full confidence in my ability to gap a plug safely, most manufacturers don't trust consumers so they might suggest not to adjust their gaps even if they are out of spec. If someone doesn't adjust the plug gap safely it can damage your piston or score your cylinder wall, so if you can't do it 100% safely then don't try it. Denso makes a similar design plug as the DFE, If you can get them pre-gapped then try them, if you can't get them pregapped and you aren't 100 percent sure in your ability then skip it and stick with the NGK Iridium. I wouldn't be sold on the hardness claim, all that means is that you can run them longer without wear of the electrodes, Iridium is already much harder than platinum, so it is plenty good, if this new metal is harder it isn't a big selling point with me. I do like the gap design of the PSPE plug though exposing the combustion chamber mixture to the spark like most surface gaps do. At the end of the day I doubt you would be able to tell a difference but it is worth a try if you can find the right plug for your application.
I have full confidence in my ability to gap a plug safely, most manufacturers don't trust consumers so they might suggest not to adjust their gaps even if they are out of spec. If someone doesn't adjust the plug gap safely it can damage your piston or score your cylinder wall, so if you can't do it 100% safely then don't try it. Denso makes a similar design plug as the DFE, If you can get them pre-gapped then try them, if you can't get them pregapped and you aren't 100 percent sure in your ability then skip it and stick with the NGK Iridium. I wouldn't be sold on the hardness claim, all that means is that you can run them longer without wear of the electrodes, Iridium is already much harder than platinum, so it is plenty good, if this new metal is harder it isn't a big selling point with me. I do like the gap design of the PSPE plug though exposing the combustion chamber mixture to the spark like most surface gaps do. At the end of the day I doubt you would be able to tell a difference but it is worth a try if you can find the right plug for your application.
You're right - Iridium is plenty good already. Definitely worth trying these new ones though. My annual service is coming up soon so I might grab a set off rockauto. $31 excluding shipping. I don't need to change the BKR8's I'm running now as they've got plenty of life left but I am eager to try these new plugs at the same time.