[Biturbos4] Spark Plug Gap?

Wilson Northrup northrup at crazybug.com
Sat May 27 10:29:08 EDT 2006

OK, so there is less resistance in that plug as compared to the stock one. 
While that seems like a good thing, i guess some had problems with that 
(SFTA on Audiworld to see). You'll want to have someone scan your car, 
look for misfires if nothing else.  Some seemed to have problems with 
that.  Since those plugs will have a shorter life, you'll want to rescan 
them at some point later as well and see how things are going.

You can probably get misfire data out of several OBDII scanners, not just 
VAG-COM.  Most any local shop or friend with a decent scanner should be 
able to help you there.

BTW, If you continue to search audiworld, you'll see that for a stock 
motor, there is a strong recomondation to stay with the stock plug.  I'm 
no plug expert... I'd like to know more about plugs :)

'00 S4 BiTurbo
'94 RX7 TwinTurbo

On Sat, 27 May 2006, The Corbs wrote:

> It's the 6418 per the NGK website.
> Will do Wilson.  Although until I get a VAG-COM tool, it will be butt dyno.
> I just searched on Audiworld and saw that the gap should be .030-032??
> The NGKs definitely require setting as their website recommends. 
> Interestingly, this is the same plug they recommend for the E36 M3.
> The car is currently stock as regards ecu and turbos.
> John Corbs
> ----- Original Message ----- From: "Wilson Northrup" <northrup at crazybug.com>
> To: "The Corbs" <c.corbishley at comcast.net>
> Cc: <biturbos4 at www.audifans.com>
> Sent: Saturday, May 27, 2006 9:49 AM
> Subject: Re: [Biturbos4] Spark Plug Gap?
>> I don't have a gap recommondation.  I'll be curious to know specifically 
>> which NGK Iridium you use, how it works out for you and details about your 
>> engine (configuration - how much boost, etc).
>> The Iridium is supposed to allow for increased efficiency, but IIRC they 
>> will need to be replaced more often.  For me, the stock ones get reaplaced 
>> every 20k.
>> If you don't mind posting your results after a bit of driving & vag-com 
>> scan, i think we'd all like to see.
>> wilson
>> '00 S4 BiTurbo
>> '94 RX7 TwinTurbo
>> On Sat, 27 May 2006, The Corbs wrote:
>>> I'm going to try the NGK Iridium plugs.
>>> Any recommendations on gap?
>>> Thanks
>>> John Corbs
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