NGK Iridiums BKR8EIX ***12k mile update on page 13***

[Tfsi_Mike]

Quick question or two - I know that these plugs are sometimes sold as single units (as they appear to be on the ebay link) as they are used in motorbikes. However, I think the bike plugs come with a different gap setting. Is it the same for these or are they preset to 0.8mm like the 4-pack?

Also, there was a post or two about some folks reducing the gap from 0.8 to 0.67mm or something like that on tuned cars. Is there anything behind reducing the gap (as there is a big danger of damaging the delicate tips on these plugs?

The pad damper I'm talkin about ^^ 

I managed to source 4 of these for my NQSBBK as I was unlucky enough to get a bit of low speed squeel although it may have been a combination of discs, pads and not being broken in enough. These things fixed it no problem anyway.  As a bit of advice, if you are going without the anti-squeel shims, use a non-petroleum based grease on the back of the pads like CeraTec. Copper grease rots the bejeeziz out of the rubber dust seals. 

It was RON ECHT who suggested that gap on the other NGK iridium thread.  I bought a feeler gauge but didnt want to damage the plug.

[Tfsi_Mike]

Can you take the brake talk to another thread please, I will clean this up a bit later.

Deleted my brake posts. Sorry about that.

[alackofspeed]

I found this thread after a bit of searching having noted my car was missing occasionally at idle after a long run at medium to high loads (extended motorway run, with some B-road overtaking for instance). I have the latest revision PCV flying-saucer-esk jobba fitted.

Mine's a stg-1 K03, so I'll report any improvement to add to the thread's statistics. For reference the plugs I removed are 15k old PFR7S8EG and they look in text-book condition. Whatever the outcome 4 iridium plugs for just over £20 makes them pretty much disposable, so cheers to the OP for the tip-off.

Notes since fitting:-

Idle better.
Fuel consumption unchanged - currently getting between 35-37mpg on the run to work, and saw 37.5 mpg on a 45 mile motorway drive earlier in the week, which is par for the course.
Engine seems to sound crisper, but this may be placebo.

[alexperkins]

Ive noticed the same so it would imply these plugs really do make a big difference.

However my MPG has improved by around 2-3mpg

[sub39h]

Ive noticed the same so it would imply these plugs really do make a big difference.

However my MPG has improved by around 2-3mpg

My mpg improvement has been more to the order of 4-5mpg

[alexperkins]

Mine may be more but I've only driven it twice since replacing them!

[markymark]

Fitted my set today and I immediately noticed the engine ran a lot smoother. My slight misfire had totally gone and she even seems more eager!

[flyboy1976]

Put mine in the other day and def smoother! I was running the NGK OEM heat range ''7'' plugs before.

[Tfsi_Mike]

Put mine in the other day and def smoother! I was running the NGK OEM heat range ''7'' plugs before.

Looking forward to feeling a difference between the 7 & 8

[MAT ED30]

Going to get some of these next week I think

[jimk04]

Have bought some of these today- got them from my local motor factor as a friend runs it, payed £35.

What is the deal with the gapping of them?

IS it best to close them down a bit?

[markymark]

Mine were gapped at .8 I think.

[alexperkins]

I wouldn't touch the gapping. Mine are perfect from their purchased spec.

[markymark]

I wouldn't touch the gapping. Mine are perfect from their purchased spec.

Mine were all over the place, that's the only reason why mine were done!

[vRSAlex]

 0.8 should be the standard gap. I always gap them down to 0.64.