[E90joee]

Been running on both stage 2+ and e30 map for a little over a year now. I've been meaning to have a tune up and walnut blast but not sure on which plugs to get, anyone have any input? And why? I'm full bolt on n55 stock turbo

[weehe126]

N20 spark plugs gapped to 0.22. Been running them for years.

[DiFFv1]

NGK 95770 (1 Step Colder) Plugs , Gap down to 0.22

[bbnks2]

Originally Posted by DiFFv1

NGK 95770 (1 Step Colder) Plugs , Gap down to 0.22

The correct 1 step colder N55 plug would be: NGK 97506 (SILZKBR8D8S )

NGK 95770 is for the N54... They would be stock heat range on an N55.

[DiFFv1]

Originally Posted by bbnks2

The correct 1 step colder N55 plug would be: NGK 97506 (SILZKBR8D8S )

NGK 95770 is for the N54... They would be stock heat range on an N55.

Works great on my N55...But personal preference along with opinion is key

Also just for information purposes the NGK 5992 (discontinued) are NGK 95770 (replacement) plugs which are basically stock plug (in terms of heat rating) that is gapped down in order to function efficiently with the engine performance mods. (meaning running smoothly without idle issues.)

The stock S55 engine plugs by NGK are the NGK 97506 which is supposed to be 1-step colder than stock in the N55 engine.

[bbnks2]

Originally Posted by DiFFv1

Works great on my N55...But personal preference along with opinion is key

Nothing I just said is opinion.

My opinion is a stock turbo car will run just fine with stock plugs and gap (as you already know and agree with since that is what you're running lol).

My own car runs the 1-step colder plug and it runs fine as well. It has a PS1 equivalent turbo modestly tuned for about 400whp. It's not necessary but I do believe my plugs appear to be running in a bit more ideal heat range so I stick with them. Plugs look perfect coming out.



I am not telling you what to run. Your plugs should be telling you that. I am just pointing out that the plug you referenced is only 1-step colder for an N54. This is an N55 specific thread so OP would want to run the plug I posted to drop 1 heat range.

[DiFFv1]

Originally Posted by bbnks2

Nothing I just said is opinion.

My opinion is a stock turbo car will run just fine with stock plugs and gap (as you already know and agree with since that is what you're running lol).

My own car runs the 1-step colder plug and it runs fine as well. It has a PS1 equivalent turbo modestly tuned for about 400whp. It's not necessary but I do believe my plugs appear to be running in a bit more ideal heat range so I stick with them. Plugs look perfect coming out.



I am not telling you what to run. Your plugs should be telling you that. I am just pointing out that the plug you referenced is only 1-step colder for an N54. This is an N55 specific thread so OP would want to run the plug I posted to drop 1 heat range.

It is indeed an opinion your opinion being that i am not on a stock turbo lol. And this was a post for input (which means advice) Which means he can take it or leave it lol. You gave yours and so did i

[weehe126]

You gave wrong info on what is 1 step colder. He corrected that. At no point was opinion brought into question.

[Zygote55]

Originally Posted by DiFFv1

It is indeed an opinion your opinion being that i am not on a stock turbo lol. And this was a post for input (which means advice) Which means he can take it or leave it lol. You gave yours and so did i

I'm not convinced you know what the word "opinion" means...

[DiFFv1]

Originally Posted by weehe126

You gave wrong info on what is 1 step colder. He corrected that. At no point was opinion brought into question.

Originally Posted by Zygote55

I'm not convinced you know what the word "opinion" means...

If you say so...All of this is also an opinion

But in the past yes, it was consider to be " 1-step colder" So if i am wrong about the phrase excuse me lol.

NGK97506 SILZKBR8D8S Laser Iridium Plug. Gapped to 0.031" out of the box. This plug is rated by NGK to be one-step colder than the NGK 95770. (Note the number 8 in the middle of the NGK part number.) In NGK lingo the higher numbers are colder plugs. So this #8 plug is colder than the #7 plugs. This plug is listed as standard for the BMW N20 and S55 engines. NGK tables also list this plug as the stock plug for the N55 engine. But that appears to be wrong. This #8 plug should be considered to be one-step colder than the stock BMW spark plug. (Burger actually lists this plug as 2-steps colder for the N54 engine, which would confirm that it is 1-step colder for the N55 engine.) For performance enhanced engines this plug should be gapped down to 0.020-0.022

And with this being said i still choose 95770 as it is my opinion and best fitting for MY car