Hey guys, I know a few of you on here are running the plugs Way offers that are one heat range colder than stock.

http://www.waymotorworks.com/cold-he...-cooper-s.html

Does anyone know off hand what the NGK part number for these plugs is?

Thanks.

 

NGK ILZKBR7A-8G

Same spark plugs the factory JCW comes with. I'm trying to look for one step colder than JCW but unsure if it's necessary.

 

NGK ILZKBR7A-8G = NGK 5992 gap .032

 

The plugs in the picture from the link are not the JCW version.

The JCW plugs are the same heat range as the MCS but in Iridium rather than Platinum.

Way say those are a range colder and are platinum...so I'm guessing a heat range 8. Platinum isn't ideal for performance though.

There are other Iridium plugs which fit the N14 and are heat range 8....but they are OEM for japanese cars.

 

From the link on Ways site.

They are one step colder.

 

The stock MINI Plugs are Heat range 8 on the NGK Scale. ILZKBR7A-8G are the factory MCS and JCW plugs only difference is that the JCW change interval is 30K miles instead of 60K.

 

According to this post:
https://www.northamericanmotoring.co...ark-plugs.html

The JCW ones are NGK: ILZKBR7A-8G, heat range 7.
Cooper S are NGK: PLZBR7A-G, heat range 7

Ideally you'd want to stay with Iridium(or better but at the expense of longevity), and one step colder.

 

??? Not sure what you're saying.

In a post above someone suggested the plugs on the Way sight are the same as the JCW plugs. The picture in the link does not show the JCW plugs but some other NGK plug. I was merely correcting what was posted...or I misunderstood what was being said.
To clarify though (you probably already know this) the JCW plugs are the same heat range as the MCS plugs. Both are heat range 7.
Sorry if I misread/misunderstood the point you were trying to make.

 

The number 8 in that position refers to the gap. .8mm in this case.

Colder heat range 8 plugs are available. They are iridium as well.

 

Share the part number for the colder heat range iridium spark plugs? Or better yet, colder heat range gold/silver spark plugs.

 

The ones I'm running are Iridiums in a heat range 8. I don't know of any silver plugs that fit.
The NGK box is at the shop so I will get the number tomorrow and post it here.
They are from Godzilla. ;-)
Let me add...these are not the final plugs I want to test. There are some even more appropriate plugs (I think) but first I need to find a thin wall socket that will fit in the N14B16 sparkplug hole!
Failing that I will bite the bullet and buy some HKS race plugs in a heat range 9.

 

If they're the stock R35 GTR plugs, they're

NGK # DILKAR8A8

That's an 8 range iridium plug that looks like it would work quite well. And it had better for what they cost! $21 each! LOL

 

Thanks. Those are the ones.
Yes they are expensive...isn't everything these days? They are that price in £ here in the UK!

I found they needed a tighter than stock gap. My weak stock coils didn't care for the standard .8mm even though this gap was ok on the JCW plugs. Interesting... They would be fine with some stronger coils, imho.
When I get a free minute I'll check the overall timing compared to what I had before with the JCW plugs. The colder plugs should give me a bit more timing at the top end. That's been my experience on other engines anyway...

 

Ha! Still cheaper than what the stealership wants for the stock plugs. $24 a piece -.- I did call them to see if they'll price match(they've done quite a bit of price matching for me) and they won't even touch the $16 I was able to get online.

 

So you're saying I should tighten the gap on these plugs because the stock coils are weak or you did it because your specific coils are weak from age?

 

Unless the coils were replaced by the dealership without being recorded in the logbook, mine are four and a half years old with 50k on them.
I got misfires with the JCW plugs at the stock .8mm gap at around 1.5-1.6bar of boost but they were fine at 1.4bar.
The GTR plugs gave smoother performance everywhere except under full load, which is currently at 1.2bar due to the clutch. The misfires were fixed by taking the gap down from the .8mm to around .6mm. Now the car runs a little better under all conditions than it did with the stock jcw plugs. I haven't tried higher boost yet though as my clutch isn't happy at anything over 275lb/ft wheel.
Once I get a chance to log timing again I will be able to see what sort of improvements the colder plugs have made. From past experience I expect to get better consistency with the timing, especially at the top end when under constant load (high speed).
For the record, I'm not recommending these plugs...just sharing my experience with them. So far so good though.

 

Your posts are very interesting now with all the troubleshooting I'm researching! I'm starting to think I have a weak coil on my stock tune N14 engine running the NGK 5992 ILZKBR7A 8G Laser Iridium spark plugs, but for the first 13,000 miles since I installed them the gap was at .028 and noticed pinging and pre-ignition was almost non-existent unless weather was very hot and dry. California 91 octane gas.

I have been told be many that the stock gap should be .032 for the N14 engine, but with a 1 step colder heat range plug does this mean the gap needs to be less? I notice very recently a few days ago when I gap them to .032 I started getting light pinging in a single cylinder (always one cylinder) in 3rd gear immediately after shifting into 3rd gear upon first few seconds of throttle application.

I never get pinging or pre-ignition in 1st or 2nd gear, 95% of the time it's in low to moderate boost in third gear. Last Tuesday I had my intake valves walnut blasted clean with ECU reset and throttle adaptation actuator re-programmed since they cleaned the throttle body and intake manifold. My MCS has also been idling at 700 RPMS for quite awhile, but idles smoothly. Both my Torque and Dash Command app show 680-700 RPMS!

Is it likely that I have a weak coil since the pre-ignition or pinging happens in only one cylinder? You would expect pre-ignition and pinging to happen in multiple cylinders and not just one, but the one cylinder issue is a reality. Cylinders tops are pretty clean for 62,000 miles and great, even compression readings!

Thank you,
Systemlord

 

Brisk qr12ls
3 heat ranges cooler than mcs
2 heat ranges cooler than jcw
i still melted them at the track after 6k
they have an even cooler plug for the mimi that i currently run
sorry for caps.
I think the ngk are 4471 are 1 step cooler than mcs stock
DENSO IXUH22
2 COOLER THAN S
1 COOLER THAN JCW
I USED THESE WITH NO PROBLEM RUNNING 25 PSI BOOST.
BE CAREFUL AS THE INSULATORS ON RHE NGK AND LESS SO THE DENSO HAVE BEEN KNOWN TO CRACK AND DROP INTO HARMS WAY.
REPLACE OFTEN IF HAMMERING AWAY.

 

does anyone know what the proper gap should be on these plugs

 

Good option NGK: ILZKR8C-8G. Very hard to find,try Ebay UK.It is Citroen DS3 Racing spark plug.I running about 1.5 bar(+21psi) , 0.6mm (0.023) cap.