Spark plugs and Ignition Coils

RoarinForeign · 06-13-2017, 11:56 AM

What kind of coils and plugs are you guys running?
I've heard Delphi or Eldor for the coils, is one better than the other?

I have a n55 JB4/mhd bef with catless dp. (FMIC is next)

Khy335i · 06-14-2017, 10:38 PM

I bought this:
https://www.ecstuning.com/b-assemble...137594937nkt1/

Be sure to gap them correctly - I can't remember it was..

hibye19013 · 06-14-2017, 10:54 PM

I have the bosch plugs and delphi plug, no problems on my end. I bought the plugs from turner motorsport and coils from amazon, better pricing at the time. From my experience with the N55, the coils have some corrosion. Removing them from the old plugs and reusing caused me issues. The old coils caused a misfire with new plugs. Id rather be safe then sorry and replace everything.

JETmn · 06-15-2017, 07:56 AM

FYI that there are now a set of plug and play aftermarket coils out there from Precision Raceworks. N54 has some ignitions settings mapped out, but they are still supposed to work with N55's multispark. I think they said it was 2x the spark energy vs stock.

Welcome to NBA Jam · 06-16-2017, 10:54 AM

I'm not sure if "better" is the right word here...it's made to manufacturer specs by a different OEM, who may or may not use different technology to achieve the same outcome. Some part numbers supercede others, and it's always a good rule of thumb to use the most recent part number.

It's ambiguous as to why part numbers change, but it can be something as simple as a manufacturer contract with BMW ran out and a competitor can do it at a better price, or as extreme as a fundamental improvement in the overall design of the part due to an original design flaw. Generally, if there's a serious design flaw, you'll know from SIBs, recalls, or forum posts.

What you can know is that because it's an OEM, you can be more assured that it's going to be a compatible part that performs as you would expect. If you buy from a reputable company, they're not going to knowingly give you a defective part if a SIB/recall currently exists (and if they do, they should replace it).

Bosch, NGK, Delphi, and Eldor are all good choices for plugs/coils. Bosch is the current OEM for plugs, and Eldor is the current OEM for coils.

06-13-2017, 11:56 AM	#1
RoarinForeign Private First Class 40 Rep 123 Posts Drives: 2011 e92 335i xdrive Join Date: Feb 2016 Location: Western MA iTrader: (0)	Spark plugs and Ignition Coils What kind of coils and plugs are you guys running? I've heard Delphi or Eldor for the coils, is one better than the other? I have a n55 JB4/mhd bef with catless dp. (FMIC is next)
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06-14-2017, 10:38 PM	#2
Khy335i Private First Class 33 Rep 96 Posts Drives: 2011 BMW 335i E92 M-Sport Join Date: May 2016 Location: Melbourne, Australia iTrader: (0)	I bought this: https://www.ecstuning.com/b-assemble...137594937nkt1/ Be sure to gap them correctly - I can't remember it was.. __________________ 335i E92 N55 Melbourne, Australia ╳ MHD Stage 2+ ╳ Remus Quad Sports Exhaust w/ 2x QTP Exhaust Cutouts ╳ VRSF FMIC ╳ VRSF Catted DP ╳ VRSF CP ╳ Injen CAI ╳ Forgestar F14 SDC https://www.instagram.com/khy335i/
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06-14-2017, 10:54 PM	#3
hibye19013 Private 10 Rep 55 Posts Drives: 2011 BMW 335i xdrive Join Date: Sep 2016 Location: SW Chicago Suburbs iTrader: (0)	I have the bosch plugs and delphi plug, no problems on my end. I bought the plugs from turner motorsport and coils from amazon, better pricing at the time. From my experience with the N55, the coils have some corrosion. Removing them from the old plugs and reusing caused me issues. The old coils caused a misfire with new plugs. Id rather be safe then sorry and replace everything. __________________ 2011 335xi \| Pure Stg 2 Turbo + inlet + GFB DV \| ETS 5" FMIC \| VRSF Catless DP + CP \| HKS Legamax exhaust \| Fuel-it Stg 2 LPFP \| K&N drop-in \| N20 TMAP \| MHD \| xHP Stg 3 \| ER Oil Cooler \| CSF Radiator \| Eibach Pro Springs \| Bilstein B6 \| F30 M Performance Brakes \| Eibach RSB \| 18" Enkei Raijin \| Michelin PSS 225/40-18 \|
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06-15-2017, 07:56 AM	#4
JETmn Lieutenant Colonel 247 Rep 1,595 Posts Drives: 2011 335i xDrive Msport Join Date: Apr 2013 Location: Orlando iTrader: (0) Garage List 2011 335Xi [0.00]	FYI that there are now a set of plug and play aftermarket coils out there from Precision Raceworks. N54 has some ignitions settings mapped out, but they are still supposed to work with N55's multispark. I think they said it was 2x the spark energy vs stock. __________________ 2011 335Xi 6AT - VRSF catless DP - VRSF 7" FMIC with turbo inlet pipe - VRSF chargepipe - Pure Stage 1 turbo - JB4 - E30 - xHP Stage 3 - Strongflex tension bushings - Whiteline RSFB - UUC rear swaybar
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06-16-2017, 10:54 AM	#5
Welcome to NBA Jam Is it the shoes!? 3892 Rep 5,111 Posts Drives: (Sold) 2011 E92 335i ZMP 6MT Join Date: Mar 2014 Location: USA iTrader: (1)	I'm not sure if "better" is the right word here...it's made to manufacturer specs by a different OEM, who may or may not use different technology to achieve the same outcome. Some part numbers supercede others, and it's always a good rule of thumb to use the most recent part number. It's ambiguous as to why part numbers change, but it can be something as simple as a manufacturer contract with BMW ran out and a competitor can do it at a better price, or as extreme as a fundamental improvement in the overall design of the part due to an original design flaw. Generally, if there's a serious design flaw, you'll know from SIBs, recalls, or forum posts. What you can know is that because it's an OEM, you can be more assured that it's going to be a compatible part that performs as you would expect. If you buy from a reputable company, they're not going to knowingly give you a defective part if a SIB/recall currently exists (and if they do, they should replace it). Bosch, NGK, Delphi, and Eldor are all good choices for plugs/coils. Bosch is the current OEM for plugs, and Eldor is the current OEM for coils.
	Appreciate 0 Quote