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NGK Spark Plugs Information

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#21 ·
I got this NGK IRIWay 7. What's the deal with this? Any good? Apparently the BKR7EIX-11 are gapped at 1.1mm, stock is at 0.6mm and these ones are at 0.8mm. What's the significance of using these as opposed to the BKR7EIX-11?

BTW, those figures were quoted to me by the person from NGK Australia.
 
#22 ·
Perm said:
Been looking into spark plugs for my Mini Cooper S and thought it would be of value to document what I have found out. ...
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Many thanks for that.


I've now read several threads here, several reviews, and several manufacturers' claims (for example, here). The general theme seems to be that (for most "normal" cars anyway) you should not expect a significant performance increase (in terms of power output) but that you might see other benefits such as better efficiency. To me this suggests that installing high-end (e.g. the NGK Iridium) plugs might represent a worthwhile investment.

I wonder if someone could summarise the actual benefits, if any, for an otherwise unmodified MINI?

mmalc
 
#23 · (Edited)
mmalc said:
I wonder if someone could summarise the actual benefits, if any, for an otherwise unmodified MINI?

mmalc
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None...

The reason for the colder plugs really comes into play when you run a lower ratio SC pulley. The colder plugs help to deter premature detonation. However, I am running a 15% with stock plugs and have had no problems. I may actually pull them out this weekend or next to see what they look like, but I don't suspect that I will see anything other than normal wear.
 
#26 ·
I got the NGK range 7 irridium plugs for reduced pulley/JCWs and I paid £5 per plug not £18!

Bought mine from sparkplugsuk online
 
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#27 ·
Arghhhh im confused now, I keep hearing different things from different people, I have been told that non standard plugs sometimes dont fit as well as the standard ones, which can cause problems. Im looking at putting a 15% pulley on, but dont want to wreck my engine (obviously) and am being told by some to keep the standard plugs and others to change to a colder plug.

DOH!
 
#28 ·
MINI_Nick said:
Arghhhh im confused now, I keep hearing different things from different people, I have been told that non standard plugs sometimes dont fit as well as the standard ones, which can cause problems. Im looking at putting a 15% pulley on, but dont want to wreck my engine (obviously) and am being told by some to keep the standard plugs and others to change to a colder plug.

DOH!
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With a 15% pulley, you can stay stock on plugs. The reason to run non-standard plugs is mainly to curb detonation and this will not happen with 15% pulley. Lots of people run colder plugs because they are sold under presumably false pretenses. I ran standard plugs for a year before I switch to colder plugs just to see what the hype was about and I found no change other than 1 MPG more in fuel savings.

That was it.... My advice is to stay stock and don't worry about it.
 
#29 ·
I run NGK irridium range 7s and there are no issues with fit if they are torqued up to the correct value!

PS I have a 15% pulley and manifold and intake
 
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#30 ·
I just recently got a 17% pulley and got the NGK iridium IK ones BKR7EIX. I got all my bits from Lohen including the plugs (despite them only listing Denso's). Just wondering if anyone has any idea why the NGK's are £40 whilst the Denso equivalents are £62 :confused: when everything I've read on MINI2 (admitidly from roland) says NGK's are the ones to have.
 
#31 ·
Damo said:
I just recently got a 17% pulley and got the NGK iridium IK ones BKR7EIX. I got all my bits from Lohen including the plugs (despite them only listing Denso's). Just wondering if anyone has any idea why the NGK's are £40 whilst the Denso equivalents are £62 :confused: when everything I've read on MINI2 (admitidly from roland) says NGK's are the ones to have.
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Mainly name....
 
#33 ·
MINI_Nick said:
Ok, so if you go for a 15% pulley, with no remap, alta intake and cat back exhaust, colder plugs are not needed?

ps i have an 05 car and have been told a remap is not necessary

Thanks

Nick
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Nick,

What you are asking is going to really vary engine to engine and should be handled that way. From what I have found with 05 and 06's is that the plugs are really not needed unless get the engine hotter than a 15% pulley with street driving is going to make. That is my stance on this matter and you could save that money to go elsewhere.

As for the ECU, it varies. There are many folks on this site that will do a performance setup without doing anything to the ECU. In my opinion, this stock ECU is pretty flexible and can handle the additional load but every car is different. Of the 10 or so cars that I have done pulley upgrades on, 6 of them were running rich (could smell fuel at the exhaust). Mine was one of these, so I decided to run MTH and it immediately made a difference and got rid of my rich running car. I would say that it is generally best to let the car know what you have done to it. Even the JCW has a remap but there are many here running 15% with stock ECU.

The bottom line is that when you mod a car, you have to work on the overall balance of the vehicle and not just focus on strapping on parts for the sake of doing that. You also need to focus on what kind of modding you are going to do whether it is street, drag, or track. Once you make up your mind on that you can then devise a path to go down. Asking here will get you 20000 different answers with no two alike. So I guess the bottom line is "what are YOU looking for".
 
#34 ·
Thanks for that info, i take your points on board, they seem to make good sense.

Really what im after, is just a bit more flexibility throughout the rev range, im not looking to make the car much quicker, if i was going to do that id probably sell up and go buy a scooby!

The car is mainly used for normal/fast road driving and the occasional track outing, but thats all. Im wanting to get a little more power without compromising the reliability also.

Thanks

Nick

DaFlake said:
Nick,

What you are asking is going to really vary engine to engine and should be handled that way. From what I have found with 05 and 06's is that the plugs are really not needed unless get the engine hotter than a 15% pulley with street driving is going to make. That is my stance on this matter and you could save that money to go elsewhere.

As for the ECU, it varies. There are many folks on this site that will do a performance setup without doing anything to the ECU. In my opinion, this stock ECU is pretty flexible and can handle the additional load but every car is different. Of the 10 or so cars that I have done pulley upgrades on, 6 of them were running rich (could smell fuel at the exhaust). Mine was one of these, so I decided to run MTH and it immediately made a difference and got rid of my rich running car. I would say that it is generally best to let the car know what you have done to it. Even the JCW has a remap but there are many here running 15% with stock ECU.

The bottom line is that when you mod a car, you have to work on the overall balance of the vehicle and not just focus on strapping on parts for the sake of doing that. You also need to focus on what kind of modding you are going to do whether it is street, drag, or track. Once you make up your mind on that you can then devise a path to go down. Asking here will get you 20000 different answers with no two alike. So I guess the bottom line is "what are YOU looking for".
Click to expand...
 
#35 ·
Hey guys i've been shopping for these recently and went to my local parts supplier and have been told that the BKR7EIX is an obsolete product now is that correct?

Because the worker at the store said they have replaced it with another part that has a different part number now.. i did a search on the Australian NGK site for an equivalent to the denso IK22 and it came up with part number IRIWAY7 as the NGK equivalent so would i be safe to buy this?

Because if not i am going to go else where and buy the old BKR7EIX one.. plus he quoted me a more pricier cost with the new part. From $15AUD to $28 per a plug

Let me know what you guys think about the changes and if they are right according to the info ive been given because i am going to buy a v2. 15% pulley as well hehe
 
#37 ·
Thanks for the reply buddy..

Should i be getting BKR7EIX -11 or the BKR7EIX ? because i know they are gapped differently but most people seem to be getting the 0.8mm gapped one or somethin which is the BKR7EIX one i think..?

I've got an exhaust.. air pod.. soon pulley 15% and then the plugs as soon as i can figure which one is the right one..

Thanks :)
 
#38 ·
If you do a search on the NGK USA site for the "appropriate" IRIDIUM plug, they recommend model ZFR6FIX-11 (photo). So based on the fact that the JCW uses a 7 series plug I bought the BKR7EIX-11 and they work great.

Now it's true that people say modded engines can use the smaller gap of BKR7EIX model, but I'm not an expert on that.

If NGK says that -11 (.044") is the correct gap, you can feel safe that it will work. NGK WEBSITE
 

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mike1967
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