spark plugs gap?

E90ROXS · 04-23-2019, 12:56 PM

I bought a new set of spark plugs. I currently run jb4 map 3 with dp, intake and exhaust. I know these plugs are gapped at .028 from the manufacturer. Should I gap it to .022 for the mods that I have?

Brett530 · 04-23-2019, 01:34 PM

My understanding is it is a function of cylinder temperature/pressure, which is a function of boost. The bolt-ons only matter if you are running higher boost. I don't know what the exact boost needs to be to start needing smaller gaps, but somewhere around 18-20 psi I think. There are a couple of spark plug threads here.

B58 · 04-23-2019, 01:44 PM

I gaped mine at .022 i think or .023 and it's the NGK 2 step colder spark plugs from burgertuning.com

G.Newt · 04-23-2019, 06:00 PM

Quote:

Originally Posted by B58

I gaped mine at .022 i think or .023 and it's the NGK 2 step colder spark plugs from burgertuning.com

They running well? I need spark plugs in about 5k miles (because fuck BMW's 60k interval).

For clarification, they're 1-step colder for our B58's.

B58 · 04-23-2019, 08:33 PM

Quote:

Originally Posted by G.Newt

They running well? I need spark plugs in about 5k miles (because fuck BMW's 60k interval).

For clarification, they're 1-step colder for our B58's.

It's running and idling smooth.

sspade · 04-23-2019, 08:47 PM

FWIW...

Im running stock gap on the upgraded NGK Laser Iridium plugs. Car runs perfect on Bootmod3 Stage 1 with FBO.

Wrestling with the idea of adjusting gap when I go stage 2 but not sure yet. Some report issues which has me iffy.

kern417 · 04-24-2019, 07:11 AM

If your logs are fine, leave the spark plugs alone.

MTWO · 04-24-2019, 07:26 AM

Quote:

Originally Posted by kern417

If your logs are fine, leave the spark plugs alone.

+1

eksigned · 04-28-2019, 11:34 PM

Quote:

Originally Posted by sspade

FWIW...

Im running stock gap on the upgraded NGK Laser Iridium plugs. Car runs perfect on Bootmod3 Stage 1 with FBO.

Wrestling with the idea of adjusting gap when I go stage 2 but not sure yet. Some report issues which has me iffy.

Who reported having issues? This a BM3 thing? (like within the thread of users?)

I think the idea of bringing down the gap is more preventative of blow out. I'd recommend it. I too didn't notice much of a difference, but it's piece of mind for what...$150?

04-23-2019, 12:56 PM	#1
E90ROXS Captain 225 Rep 677 Posts Drives: E90 Join Date: Feb 2012 Location: SJ iTrader: (1)	spark plugs gap? I bought a new set of spark plugs. I currently run jb4 map 3 with dp, intake and exhaust. I know these plugs are gapped at .028 from the manufacturer. Should I gap it to .022 for the mods that I have?
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04-23-2019, 01:34 PM	#2
Brett530 Second Lieutenant 208 Rep 245 Posts Drives: '17 F30 340i Join Date: Apr 2016 Location: Utah iTrader: (0)	My understanding is it is a function of cylinder temperature/pressure, which is a function of boost. The bolt-ons only matter if you are running higher boost. I don't know what the exact boost needs to be to start needing smaller gaps, but somewhere around 18-20 psi I think. There are a couple of spark plug threads here. __________________ 2017 F30 340i RWD // MG Flasher // xHP // CG DS-1 // ZTR ZMP ZCW ZLP
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04-23-2019, 01:44 PM	#3
B58 Major 558 Rep 1,457 Posts Drives: 922 Turbo Join Date: May 2018 Location: USA iTrader: (1)	I gaped mine at .022 i think or .023 and it's the NGK 2 step colder spark plugs from burgertuning.com __________________ 2024 X3 M40i 2014 BMW M5
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04-23-2019, 08:47 PM	#6
sspade Major General 2466 Rep 5,457 Posts Drives: F30 Join Date: Oct 2017 Location: Stevenson, WA iTrader: (3) Garage List 2016 BMW 320i [7.87] 2014 BMW 328i [6.83]	FWIW... Im running stock gap on the upgraded NGK Laser Iridium plugs. Car runs perfect on Bootmod3 Stage 1 with FBO. Wrestling with the idea of adjusting gap when I go stage 2 but not sure yet. Some report issues which has me iffy.
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