For the record: The bentley says spark plug gap is 0.4-0.6mm, or 0.0157"-0.0236"

davenew · 07-24-2005, 09:19 AM

In other words, the plug gap I'm using is too wide! I set mine to 0.028" (0.71mm), which is not within the range of 0.015"-0.023". I asked on here a couple of times and didn't get much info.

Is it me, or does this recommended plug gap seem very small? I always thought direct ignition coils were strong enough for a much wider plug gap. I think I'll set my new plugs to 0.020" and see how it runs. I run regular copper ngk plugs.

Disappear lika Ghost · 07-24-2005, 09:32 AM

DAP@EPL · 07-24-2005, 09:34 AM

The Bosch Platins are pregapped to 0.6mm (0.024") and are fine at that gap.

-Dave Pramanik

davenew · 07-24-2005, 09:39 AM

DAP@EPL · 07-24-2005, 09:40 AM

davenew · 07-24-2005, 09:42 AM

I wouldn't install pregapped plugs without checking the gap. To check them, you need to know what the proper gap is

DAP@EPL · 07-24-2005, 09:47 AM

Disappear lika Ghost · 07-24-2005, 10:11 AM

the real cause of the misfires, I mean

DAP@EPL · 07-24-2005, 10:11 AM

davenew · 07-24-2005, 10:40 AM

From what I've heard, if you run a given gap for stock boost level, you would tighten the gap slightly when adding more boost. My car runs great. I wonder what the max gap is for running 20psi

thanks

07-24-2005, 09:19 AM	#1
davenew AudiWorld Super User Account #: 70028 Join Date: Feb 2004 Posts: 7,828	For the record: The bentley says spark plug gap is 0.4-0.6mm, or 0.0157"-0.0236" In other words, the plug gap I'm using is too wide! I set mine to 0.028" (0.71mm), which is not within the range of 0.015"-0.023". I asked on here a couple of times and didn't get much info. Is it me, or does this recommended plug gap seem very small? I always thought direct ignition coils were strong enough for a much wider plug gap. I think I'll set my new plugs to 0.020" and see how it runs. I run regular copper ngk plugs. __________________ '00 S4 EPL Stg 3 (March'04-May'08) '08 BMW 135i Dinan Stg 2 (May'08-Present) '00 S4 Imola widebody AWE Stg 3 (Bought Nov'08. AWE stg 3 kit is sold.. I'm switching over to ASP GT soon)

07-24-2005, 09:32 AM	#2
Disappear lika Ghost Member Account #: 66383 Join Date: Dec 2003 Posts: 2,078	get the Bosch Platins and be done with it. :-p

07-24-2005, 09:34 AM	#3
DAP@EPL Audiworld Sponsor Account #: 6924 Join Date: Jun 2000 Posts: 19,701	I think the Bentley is wrong on that. EVERY stock plug that I've removed was gapped at 0.028". The Bosch Platins are pregapped to 0.6mm (0.024") and are fine at that gap. -Dave Pramanik __________________

07-24-2005, 09:39 AM	#4
davenew AudiWorld Super User Account #: 70028 Join Date: Feb 2004 Posts: 7,828	OK, I'll set them to .024" __________________ '00 S4 EPL Stg 3 (March'04-May'08) '08 BMW 135i Dinan Stg 2 (May'08-Present) '00 S4 Imola widebody AWE Stg 3 (Bought Nov'08. AWE stg 3 kit is sold.. I'm switching over to ASP GT soon)

07-24-2005, 09:40 AM	#5
DAP@EPL Audiworld Sponsor Account #: 6924 Join Date: Jun 2000 Posts: 19,701	Nothing wrong with 0.028". If the car runs fine at that gap, leave them there. That is the OEM gap __________________

07-24-2005, 09:42 AM	#6
davenew AudiWorld Super User Account #: 70028 Join Date: Feb 2004 Posts: 7,828	pregap doesn't mean you don't need to know the proper gap I wouldn't install pregapped plugs without checking the gap. To check them, you need to know what the proper gap is __________________ '00 S4 EPL Stg 3 (March'04-May'08) '08 BMW 135i Dinan Stg 2 (May'08-Present) '00 S4 Imola widebody AWE Stg 3 (Bought Nov'08. AWE stg 3 kit is sold.. I'm switching over to ASP GT soon)

07-24-2005, 09:47 AM	#7
DAP@EPL Audiworld Sponsor Account #: 6924 Join Date: Jun 2000 Posts: 19,701	Right. Always check. __________________

07-24-2005, 10:11 AM	#8
Disappear lika Ghost Member Account #: 66383 Join Date: Dec 2003 Posts: 2,078	have you sorted out the misfires yet? or still just speculating? the real cause of the misfires, I mean

07-24-2005, 10:11 AM	#9
DAP@EPL Audiworld Sponsor Account #: 6924 Join Date: Jun 2000 Posts: 19,701	Haven't had a chance to put that ECU in a different car yet. __________________

07-24-2005, 10:40 AM	#10
davenew AudiWorld Super User Account #: 70028 Join Date: Feb 2004 Posts: 7,828	OEM gap for stock boost levels From what I've heard, if you run a given gap for stock boost level, you would tighten the gap slightly when adding more boost. My car runs great. I wonder what the max gap is for running 20psi thanks __________________ '00 S4 EPL Stg 3 (March'04-May'08) '08 BMW 135i Dinan Stg 2 (May'08-Present) '00 S4 Imola widebody AWE Stg 3 (Bought Nov'08. AWE stg 3 kit is sold.. I'm switching over to ASP GT soon)

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