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BMW 3-Series (E90 E92) Forum > E90 / E92 / E93 3-series Powertrain and Drivetrain Discussions > N55 Turbo Engine Tuning and Exhaust Modifications - 335i Tuning > MHD Stage 2+ Spark Plugs



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      09-16-2018, 12:48 AM   #23
TheGoodTheBadTheUgly
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Quote:
Originally Posted by bbnks2 View Post
If you aren't having problems then what do you think a tighter gap is going to do for you??? You don't need to gap down plugs on a stock turbo n55.
Even if I will be running a Stage 2+ tune on FBO?
I mean it is absolutely not a question of money it's more of a is there any disadvantage going for a colder spark plug?

The way an inexperienced person like me is seeing the situation right now is the colder the safer, so if you could clarify why it's not worth getting colder plugs maybe that would help.
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      09-16-2018, 03:51 AM   #24
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Quote:
Originally Posted by TheGoodTheBadTheUgly View Post
Even if I will be running a Stage 2+ tune on FBO?
I mean it is absolutely not a question of money it's more of a is there any disadvantage going for a colder spark plug?

The way an inexperienced person like me is seeing the situation right now is the colder the safer, so if you could clarify why it's not worth getting colder plugs maybe that would help.
Found this for you:

Quote:
Originally Posted by LiquidREVUP View Post
If there's not enough boost and heat and pressure is too low inside the cylinder, the spark plug tip is "too cold" and can't self clean. Fuel on the tip and fouls up, eventually causing misfire. Too cold a plug and you have to change the spark plugs right away.
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      09-16-2018, 12:37 PM   #25
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I'm stage 2+ with the stock Bosch plugs and they're working perfect no complaints at all
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      09-16-2018, 03:45 PM   #26
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Trust me, on N55 x drive you are fine on OEM coils and plugs with FBO and tune.

The only time you should consider 1 step colder NGK plugs is if you have a hybrid turbo.

V
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      09-16-2018, 07:47 PM   #27
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Quote:
Originally Posted by Vampire335i View Post
Trust me, on N55 x drive you are fine on OEM coils and plugs with FBO and tune.

The only time you should consider 1 step colder NGK plugs is if you have a hybrid turbo.

V
You're fine if you go with 1 step colder or OEM with FBO + tune. Just depends on what you just feel like doing.
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      09-17-2018, 07:49 AM   #28
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Quote:
Originally Posted by TheGoodTheBadTheUgly View Post
Even if I will be running a Stage 2+ tune on FBO?
I mean it is absolutely not a question of money it's more of a is there any disadvantage going for a colder spark plug?

The way an inexperienced person like me is seeing the situation right now is the colder the safer, so if you could clarify why it's not worth getting colder plugs maybe that would help.
I already gave my experience that 1-step colder is good.

You replied to a post where I am saying that there is no need to pull your plugs back out to gap them down smaller. Two completely different things.
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      09-17-2018, 11:24 AM   #29
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Quote:
Originally Posted by DYOOS View Post
Found this for you:
There we go thanks a lot!
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      09-17-2018, 11:25 AM   #30
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Quote:
Originally Posted by Vampire335i View Post
Trust me, on N55 x drive you are fine on OEM coils and plugs with FBO and tune.

The only time you should consider 1 step colder NGK plugs is if you have a hybrid turbo.

V
Roger that thanks!
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      09-17-2018, 12:23 PM   #31
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Since I see lots of reference to "one step colder" with no reference to part numbers, I wanted to point out that on the BMS website it's all relative to the stock N54 plugs.
So the: "NGK 5992 1-Step Colder Spark Plug" is actually the same heat range as the stock N55 ZR5TPP33S plug.

One step colder would be the NGK 97506 N20 replacement ones.
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      09-17-2018, 01:44 PM   #32
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Quote:
Originally Posted by Supermoon View Post
I use stock bosch plugs without any issues.
I don't think NGK plugs are needed for OTS pump gas maps.
Yeah I'm going stage 2 and understood that stock plugs were fine.
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      09-18-2018, 10:13 PM   #33
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Im on mhd S2+, running S55 plugs, stock gap, no problems
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      09-19-2018, 01:14 PM   #34
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Quote:
Originally Posted by HOT335MSPORT View Post
Im on mhd S2+, running S55 plugs, stock gap, no problems
Hmm interesting, the S55 plugs are direct fit?
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      09-19-2018, 09:43 PM   #35
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Quote:
Originally Posted by TheGoodTheBadTheUgly View Post
Hmm interesting, the S55 plugs are direct fit?
yes, cheap too, i got mine for $7 each
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