05-24-2016, 07:01 PM | #23 |
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Does the normal 14mm 12pt socket work? Looks like the copper plugs are 6pt.
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05-24-2016, 07:11 PM | #24 |
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Thin wall is needed, http://www.amazon.com/CTA-Tools-2376...rk+plug+socket
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05-24-2016, 07:41 PM | #25 | |
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- 1 step colder iridium (ocn55 reco) - copper (which ones? Pparana reco) - n20 (?) You guys are all familiar with my mods... |
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05-26-2016, 11:28 PM | #27 |
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Is that what you ran?
The stock ngk iridiums? |
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05-27-2016, 12:12 AM | #29 | |
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The car is running great since the new plugs, no problems whatsoever, idle and under power is very smooth. I think I am good for now. Thanks again! |
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05-27-2016, 08:27 AM | #30 |
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Depends on what you want, copper most power, most Maintence. N20 is what I would run if I was In a 91 octane state.
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05-27-2016, 09:05 AM | #31 | |
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Looks like N20 is popular with by power guys. |
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02-13-2017, 09:45 AM | #32 |
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Have you tried the N20 plugs or did you go a different route..? After much searching it seems the old 5992's now NGK ILZKBR7A-8G are very popular on N54 tech and come well received by Terry running JB4. Im debating between the copper core 4786's, old 5992's, and N20's. Correct me if im wrong but all 3 of these plugs are one step colder in heat range than our stock plugs which would seem like the sweet spot running roughly 100hp over stock. I would like to know the latest info on plug choices before i replace mine here soon. I will be FBO this spring running stock turbo and fueling system 3-4 gal E85 to 93oct map 5.
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02-27-2017, 04:06 PM | #33 | |
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http://www.jegs.com/i/NGK+Spark+Plug...YQDBoCIZTw_wcB I might not be 100% right, but if your car is not running an upgraded turbo, I'd stay with the stock plugs or whatever Terry recommends. But generally, from all the tuners I've spoken with Copper is a better conductor than Iridium. Iridium lasts longer. BTW, IF you get the N20 plugs, make sure to gap them yourself to the right N55 gap. They are NOT pre-gapped for the N55. Hope this helps. |
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03-01-2017, 10:52 AM | #35 |
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03-01-2017, 11:07 AM | #36 |
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I saw the post but I should rephrase my question. Other than being gapped differently, are Laser Iridium or is the N20 a combination of some other compound? I'm sure the higher boost levels experienced by N20 spark plugs have something to do with it.
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03-21-2017, 10:50 AM | #37 |
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I think it was also mentioned above that the N20 plugs are copper vs the N55 being iridium.
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03-21-2017, 01:09 PM | #38 |
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08-01-2017, 05:33 PM | #40 |
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i'm running the s55 plugs, 15k miles, no issue.
So in a pinch, you can run the n20 or s55.
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08-02-2017, 07:33 PM | #41 |
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What about M2 plugs? They seem to be different from M235i
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11-19-2017, 12:07 PM | #43 |
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Did you ever make a decision on plug choice. I have S55’s waiting for install but I think I’m going to sell them and opt for the N20’s due to what I have been reading lately. The part # (NGK SILZKBR8D8S). I have read NGK and Bosches heat ranges differ and do not directly correlate. Running between 80-100hp more than stock should decrease heat range by 1. The N20 plug is 1 step colder than the stock N55 plug. The S55 plug also has the same heat range as the stock N55 plug. So anyone of us FBO folks should benefit from a colder plug. The N20 plug gapped to .020 - .023 depending on boost seems to be the way to go.
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11-19-2017, 08:18 PM | #44 |
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I just ordered my set of plugs from Amazon. Gotta love when they are on sale and you get 2 day shipping. Got the N20's because I have the N20....ha ha.
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