B58 coils and 97506 ngk gap

Liukk89 · 01-22-2023, 04:40 AM

Hello guys, someone is running b58 coils on n55 with nexys adapter?
What gap do you recommend on 97506?
Now i'm running ngk's with 0.45mm gap (0.0177 inch)
Car have a stage 3 with upgrade turbo
Thanx

F87source · 01-22-2023, 03:22 PM

That gap is too tight especially with upgraded coils. You should start from stock gap ~0.028"-0.032" (this is in inches) and gap down as needed.

Because an overly tight gap makes it harder to get complete combustion and can cause harsh rough idles. You only gap down to prevent spark blow out, which is less likely to occur with more powerful upgraded coils.

01-22-2023, 04:40 AM	#1
Liukk89 New Member 2 Rep 10 Posts Drives: F87 m2 lci Join Date: Jun 2021 Location: Italy (UD) iTrader: (0) Garage List 2017 Bmw M2 lci [9.67]	B58 coils and 97506 ngk gap Hello guys, someone is running b58 coils on n55 with nexys adapter? What gap do you recommend on 97506? Now i'm running ngk's with 0.45mm gap (0.0177 inch) Car have a stage 3 with upgrade turbo Thanx
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01-22-2023, 03:22 PM	#2
F87source Major General 7254 Rep 7,431 Posts Drives: Bmw M2 Join Date: Aug 2018 Location: . iTrader: (1)	That gap is too tight especially with upgraded coils. You should start from stock gap ~0.028"-0.032" (this is in inches) and gap down as needed. Because an overly tight gap makes it harder to get complete combustion and can cause harsh rough idles. You only gap down to prevent spark blow out, which is less likely to occur with more powerful upgraded coils.
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