MK5 Golf GTI
All Things Mk5 => Mk5 General Area => Topic started by: Janner_Sy on January 13, 2010, 02:54:56 pm
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you often here about pople upgrading their spark plugs, commonly used is the iridium BKR7EIX spark plugs.
reading JKMs link http://www.jkm.org.uk/performance/tfsimisc.htm
they say that they are one heat range colder, what does this mean and what are the benefits of having the heat range set lower.
currently im running a set of these bosch plugs from halfords http://www.halfords.com/webapp/wcs/stores/servlet/product_storeId_10001_catalogId_10151_productId_194623_categoryId_165736_langId_-1?cm_vc=IOV4PLPZ1
Not to sure on the heat setting of these, any one know how they would rate??
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A cooler plug helps to prevent pre-ignition. Running too cold can cause problems when idling the engine or low speed/load and the cyclinders are running at lower temperatures.
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reading JKMs link http://www.jkm.org.uk/performance/tfsimisc.htm
they say that they are one heat range colder,
....Funny, because it was JKM who told me that the oem plugs were fine and I didn't need to change to a cooler plug. However, I was at Stage1 when I asked.
I change my spark plugs every 20k miles anyway.
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reading JKMs link http://www.jkm.org.uk/performance/tfsimisc.htm
they say that they are one heat range colder,
....Funny, because it was JKM who told me that the oem plugs were fine and I didn't need to change to a cooler plug. However, I was at Stage1 when I asked.
I was about to add the same thing, there is unlikely to be any advantage to running a colder plug unless you're going a bit mental with your tuning like a certain Mr. Jonny C. If you just need to replace your plugs, I'd stick we OE spec.
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how do they compare price wise, because if thats comparable, then it would be worth the swap
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^^^^
I've put in a call to JKM to see what they have to say.
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how do they compare price wise, because if thats comparable, then it would be worth the swap
No idea... You'd need to check that out but I cant see there being much in it. Similar to oil, lots of different grades, all priced more or less the same, its just a case of picking the correct one for your engine. From experience, for something like spark plugs main dealers are usually as competative as anywhere else. I cant speak for Skoda/VW specifically though.
The Halfords page is a bit dodgy as it doesn't actually allow you specify which type of plug you want to order! Some modern plugs can straddle more than one heat range but they are far from 'one size fits all'.
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Denso Iridium power spark plugs are the ones I'm using. No issues at all with running them :happy2:
Around £8 to £10 each.
IK24's (don't know the full number as I'm not at home). 2 steps colder than OEM Bosch ones. Equivalent OEM Denso ones are IK20, then IK22 and then IK24 and they go all the way up to over 30, which must be uber cool plugs!! :laugh:
I was recommended to run colder plugs on stage 2+ K04 :smiley:
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not sure if im reading your post correct but the gist i got was
your Denso iridium plugs part no IK24........
the standard Oem equivelent Denso Plug is a Ik20 part number
etc etc
i believe my bosche ones are the equivalent to oem spec
where abouts did you pick yours up john. if theyre fine on yourd im sure they will fine on mine, or would you say maybe 1 heat setting higher than your densos would be about right. maybe a set of Ik22 would be a decent buy for me since i am running around 100Hp less than you :ashamed:
although both our turbos will be stretched to the safe limit.
this is a quote from JKM website
Colder spark plugs remove heat quicker, helping to reduced timing pull
that cant be a bad thing to be honest
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I bought mine off Steve Jr at Statllers. He'd bought them for his own car and I "appropriated" them :laugh:
I'd just go for the IK24's if I were you. You could run these on a stage 1 car without any idling issues. :smiley:
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this is a quote from JKM website
Colder spark plugs remove heat quicker, helping to reduced timing pull
that cant be a bad thing to be honest
No, but if they run too cold and the tip doesnt get up to optimum temperature (at idle/tickover or even during sedate 'normal' driving) they can become fouled/sooted up which will reduce their performance significantly. There are trade offs and it is possible to be to cold.
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I changed my o/e plugs for the cooler ones at 14k miles. I noticed a smoother idle straight away. Always best if your running more power.
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I've been thinking about changing my plugs aswell if it'll benefit so I'm glad this topic has come up.
I'd just go for the IK24's if I were you. You could run these on a stage 1 car without any idling issues. :smiley:
I'm running a custom stg1 map on my KO3 GTI so would you recommend sticking with the OEM plugs or would it be worth changing to some of the IK24's?
Cheers
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I've fitted the plugs from JKM after a guy over on ASN noticed reduced timing pull runnin stg2+ on his S3 after fitting them, it certainly does feel a little crisper :smiley:
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I've been thinking about changing my plugs aswell if it'll benefit so I'm glad this topic has come up.
I'd just go for the IK24's if I were you. You could run these on a stage 1 car without any idling issues. :smiley:
I'm running a custom stg1 map on my KO3 GTI so would you recommend sticking with the OEM plugs or would it be worth changing to some of the IK24's?
Cheers
X2
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On a K03 you'd see a small benefit changing to IK24's in terms of idling, but there wouldn't be much in it at the top end in performance unless you are running a HPFP. On a K04 I believe that even on a remap only modded car you would see a benefit from the IK24's :happy2:
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My car is coming to its 30K service interval...I think VW normally change the spark plugs during that service.
I might as well use the opportunity to put some of these IK24s that have been mentioned here.
Not entirely sure what an IK24 spark plug is...what do I need to look on the packaging, or where can I source these online?
Many thanks :happy2:
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Euro car parts sell them.
Denso Iridium Power IK24-5311
I think Euro car parts part number is 408 77 5420 according to the box in front of me
On the base of the box it says...
IK24#4
5311#4
Barcode part number is.....0 42511 53114 7
:happy2:
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Thanks Hurdy!
Before I order a set someone has told me that there are spark plugs with 4 tips. :surprised:
Apparently they are used in the Porsche turbos...is this horse sh*t...or is there an element of truth to this, in which has anyone come across a set of these for our cars?
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the bosche ones fitted to mine use 4 tips, doubt that would have anything to do with the heat setting though. link in post #1 for them
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the bosche ones fitted to mine use 4 tips, doubt that would have anything to do with the heat setting though. link in post #1 for them
Do you have a porsche, or are the 4 tips fitted to your GTi?
I can't seem to find the 4 tip ones in the the links in the first post here.
Also, if they don't help with the heat - what do they improve?
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I've just spoken with JKM about the spark plug subject and they advise that OEM plugs are absolutely good for anything up to Stage3 on the K03 2.0T FSI. K04 cars may benefit if modified.
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I've just spoken with JKM about the spark plug subject and they advise that OEM plugs are absolutely good for anything up to Stage3 on the K03 2.0T FSI. K04 cars may benefit if modified.
I'm not convinced RR... I think it's not a costly experiment to try out the uprated spark plugs...
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Simon, i fitted the iridium and got them from JKM. Can't remember how much at the time. They have 30k on them now and run perfect.
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I've just spoken with JKM about the spark plug subject and they advise that OEM plugs are absolutely good for anything up to Stage3 on the K03 2.0T FSI. K04 cars may benefit if modified.
I'm not convinced RR... I think it's not a costly experiment to try out the uprated spark plugs...
....Fair enough but I prefer not to experiment at all and JKM know my individual car extremely well, so I take their advice.
Being modified, I change my plugs every 20k miles anyway.
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what are the sympotms of duff spark plugs. Since fitting my cat back and new bosch plugs there has been a slight dip at 5000RPM. might just swap the plugs and see if that helps.
if there was a leak on the exhaust would that potentially cause a drop at all
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Ok, I'm a little confused... Opie Oils suggest the Denso VK20Y when I put my car details in... the euro parts gives me a Denso with the part number 408775350 - but not model no. Is this the correct one?
I guess the IK variants are Iridium and the VK variants are LongLife Iridiums.... so which ones should I be going for?
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The ones I mentioned earlier. IK24's!!!!!!!!
The long life ones aren't even a colder rating by the looks of it.
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The ones I mentioned earlier. IK24's!!!!!!!!
The long life ones aren't even a colder rating by the looks of it.
Cheers Hurdy... so how long do the IK24s last for?
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The ones I mentioned earlier. IK24's!!!!!!!!
The long life ones aren't even a colder rating by the looks of it.
Cheers Hurdy... so how long do the IK24s last for?
They should easily last 30k miles, but I normally replace mine every 20k. I'm at 23.5k and the car is now almost 3yrs old.
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Question...
The NGK irdium plugs recommended by JKM are one grade cooler than standard ,where as the Densos recommended for stage2+ ed30s like mine are supposed to be 2 grades cooler.
Is one really better than the other ?
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Not much in it really.
Roughly speaking for every 70bhp the car increases in performance you should go 1 step colder with the plugs. So a stock car is 227bhp and a stage 1 is around 290-300bhp, so should go 1 step colder. A stage 2+ car will be anywhere between 340bhp and 370bhp and so should go 1-2steps colder with plugs.....simple :smiley:
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The ones I mentioned earlier. IK24's!!!!!!!!
The long life ones aren't even a colder rating by the looks of it.
Cheers Hurdy... so how long do the IK24s last for?
Spoke to Opie oils... and the situation is as follows:
Denso Iridium need replacing after 50K
Denso Iridium Long Life need to be replaced after 100K
The thing exercising my mind now is that the IK24s have a gap of 0.4mm, whereas the VK20Ys have a gap 0f 0.8mm...
Will this impact the running of the car?
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Personally, I change my plugs every 2 years regardless of mileage.
I think I'm taking comfort from the fact Densos are 2 grades cooler which presumably is a little cooler than the NGK plugs.
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Spoke to Opie oils... and the situation is as follows:
Denso Iridium need replacing after 50K
Denso Iridium Long Life need to be replaced after 100K
The thing exercising my mind now is that the IK24s have a gap of 0.4mm, whereas the VK20Ys have a gap 0f 0.8mm...
Will this impact the running of the car?
I've been running the IK24's now for around 3 months and they have been great. No lumpy idle, starts every time.
The gap isn't 0.4mm, it is the diameter of the tip :happy2:
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Cheers Hurdy...it was Opie Oils who got me thinking as the IK24s don't come up when they tap in the GTi details.
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Car is due for it's 30K service very soon... any updates/or further feedback on the IK24s before I take the plunge?