Spark Plugs Info
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Thread: Spark Plugs Info

  1. #1
    Dubster Rancher's Avatar
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    Default Spark Plugs Info

    Please Mr Moderator: Do not KILL me! I am certain that the subject of "Spark Plugs" has been addressed on this forum, but not with seat of the pants technology...

    As usual, a huge robust discussion took place among my crowd regarding "Spark Plugs". Specifically, which ones should you be running with APR's KO4 setup to which we all ponied-up money into the pot buying three (3) sets of plugs. Of course, my car 2011 MKVI (see mods) was chosen because it barely has 10,000 miles and it is only driven for fun.. In short, not my daily driver... Yes, it got really deep, especially with plug gaps -- .028" verses .032" -- Jesus, these guys are relentless.... With seat of the pants technology we tested the following:

    - Bosch OEM #BOM 06H905611 R1
    - NGK #PFR7S8EG Stock Number 1675
    - NGK #PFR7B Stock Number 4853

    The NGK #1675 w/gap of .032" won hands down. I was stunned that we all agreed which is historical with this crowd. Additionally, it is a testament that the NGK #1675 is the plug you should be running. Note: this plug is the recommended OEM replacement per NGK...

    However, as with anything a really weird thing stood out in that the NGK #4853 produced a notable smoother idle. Make no mistake! The NGK #1675 produced a good idle, no problems, but it didn't seem as smooth. Go figure!

    I might also suggest that those running the Bosch OEM plugs on Stock, Stage I, Stage II or KO4 Turbos should replace them with the NGK #1675 as everything we concluded points that direction. Frankly, everything about the Bosch OEM seemed cheap, the look, the feel -- just the general build quality IMO..

    Attached are pics of the Bosch OEM and the NGK #4853.. The NGK #1675 plugs are still in my car and I am not removing them for pics.. lol.. FYI - The color of the NGK #1675 was literally in between the Bosch OEM (dark one) and NGK #4853 (white one) color which makes sense, I think...

    Click image for larger version.

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    In closing, I will say that the difference between all these plugs with our seat of the pants technology was stunning... Yes, you can literally feel the difference, especially between with the Bosch OEM / NGK #1675 verses the NGK #4853 and no we were not drinking.... lol... FYI: the NGK #4853 gapped at .028" is the recommended for APR's Stage III.....

    I hope no nerves have been hit here.. Just us car guys sharing seat of the pants technology info...
    Last edited by Rancher; 09-06-2012 at 01:07 AM. Reason: pics
    >>>> 2011 MKVI <<<<

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    Default

    Solid info, and I think sticky worthy. Thanks for the post!
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    Can't get your loose stick into top gear, eh?

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    I'm Watching You volcano's Avatar
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    Default

    Good info

    Don't think it's sticky worthy since there is no dyno testing

    But it can be included/linked in what mods to do thread

    Not sure if these car should be running a colder plug when tuned like older generations

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    GTI Master Coltello's Avatar
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    Default Re: Spark Plugs Info

    I don't know. I love my Bosch Platinum Iridiums. Gapped at .30. No hpfp upgrade, stage 2 with no fuel cuts and a smooth idle. <<shrug>>
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    Default Re: Spark Plugs Info

    thats why i said it needs dyno testing
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    GTI Master Coltello's Avatar
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    Default Re: Spark Plugs Info

    Quote Originally Posted by volcano View Post
    thats why i said it needs dyno testing
    Agreed. I've even heard of people running Denso's and loving them.
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    Default Re: Spark Plugs Info

    You guys are relentless... Sticky worthy - Not Sticky Worthy - Dyno Pulls - Denso's - Platinum Iridiums.... Why not throw in some KRYPTONITE guys? lol....

    Geeezz.. Didn't mean to start all of this, you know...

    Seriously, regardless of what platform your running go get some plugs, get your tools out, remove that engine cover and play around... You don't need to go ANAL as the verdict will be in your ASS, no pun intended....

    Again, we are simple car guys just having fun and sharing this hopefully helpful info.. Yes, take it with a grain of salt as I have no idea what your findings will be and/or what you really did, but I do STICK by GUNS --- running a MKVI Platform Stock, Stage I, Stage II or KO4 set-up I do recommend the NGK #1675 at .032" -- the verdict was crystal clear without a single DUNNO in this crowd.....

    You guys are too funny and I love it....
    >>>> 2011 MKVI <<<<

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    Engine cover? Pshhh...weak!

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    Default Re: Spark Plugs Info

    i know, what the hell is an engine cover?
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    Default Re: Spark Plugs Info

    Quote Originally Posted by volcano View Post
    i know, what the hell is an engine cover?
    You guys are joking, right?? It's that big thing literally in the center of your engine bay sitting on top of your engine that covers your 'Kaneuter Valve and Johnson Rod" -- lol....

    I don't mean any harm and do sincerely apologize if your not joking and/or f**king with me....

    Attached are some pics, just in case....

    Click image for larger version.

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    >>>> 2011 MKVI <<<<

  12. #11
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    Not sure if serious.

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    Hidden Content Originally Posted by xcrazydx Hidden Content
    I wouldn't trust them to install a burrito into a paper bag.
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    Default Re: Spark Plugs Info

    Quote Originally Posted by csmith1957 View Post
    Not sure if serious.

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    Speaking of serious... One thing is for sure: We have SERIOUSLY deviated from the topic of this thread...

    I'm calling it quits here guys.... Good luck!!
    >>>> 2011 MKVI <<<<

  14. #13
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    I'm just trolling, waiting on those dyno tests.

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    Default Re: Spark Plugs Info

    most of my covers are gone

    got ripped of from being too low

    or tires rubbed half of it off

    there is no use for them anyways
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    Quote Originally Posted by csmith1957 View Post
    Not sure if serious.

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    Lol I'm fairly sure he thinks you were serious
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    Default Re: Spark Plugs Info

    Quote Originally Posted by Rancher View Post
    You guys are joking, right?? It's that big thing literally in the center of your engine bay sitting on top of your engine that covers your 'Kaneuter Valve and Johnson Rod" -- lol....

    I don't mean any harm and do sincerely apologize if your not joking and/or f**king with me....

    Attached are some pics, just in case....

    Click image for larger version.

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    Wait...There's something under the hood of my car? And it's not magical elves? LIES

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    Default Re: Spark Plugs Info

    Getting ready to put new plugs in my 2010. Any here have similar results (seat of the pants) with the NGK plugs?

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    Quote Originally Posted by ghahn View Post
    Getting ready to put new plugs in my 2010. Any here have similar results (seat of the pants) with the NGK plugs?
    Yeah I use ngk plugs

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    well im a blob and im comfortable in my mk4
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  20. #19
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    Default Re: Spark Plugs Info

    OK, just put new NGK 1675 plugs in my 2010. Not sure I needed new ones but I have 51000 on the original and started to notice it was running a bit rough on a cold start-up but within a minute smoothed out. With the new plugs the cold start-up roughness is now a little worse but again becomes smoother after a minute or so. The real difference I am seeing is a drop in gas mileage from combined 29 to about 24 as indicated by the mileage gauge. I haven't run though a full take yet but it has never indicated gas mileage this low. Haven't changed my driving habits or fuel. I'm running APR stage1 on 92 octane with Carbonio intake and magnaflow catback. Performance seems about the same (maybe a bit stronger). With these plugs is a drop in MPG normal? The stock plugs were NGK but not 1675. Any thoughts? Thanks. P.S. New fuel filter was put in 1000 miles ago.

  21. #20
    Dubster Fraydknot's Avatar
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    Default Re: Spark Plugs Info

    What gap did you use? And do you have the throttle body alignment capability with your tune?

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  22. #21
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    Default Re: Spark Plugs Info

    The plugs came pre-gapped at 0.32. With the APR stage1 tune not sure if I have throttle body alignment (whatever that means). Sorry not real savvy in this area.

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    Default Re: Spark Plugs Info

    Quote Originally Posted by ghahn View Post
    The plugs came pre-gapped at 0.32. With the APR stage1 tune not sure if I have throttle body alignment (whatever that means). Sorry not real savvy in this area.
    0.32 is correct. Did you check them to make sure they were actually 0.32? Which could cause your issue.

    If you have the full program load that most people get when they wait for the APR sale you should have it. You can run the alignment process when the car is cold and it helps get rid of the rough idle.

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  24. #23
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    Default Re: Spark Plugs Info

    No I didn't check the gap, just assumed they were correct. With the APR tune I have stock mode, 91 octane mode(We only have 92 in my area) and the valet mode. I know I should do a search, but I really don't know anything about how to do a throttle body alignment or even what that means. Thanks for your input.

  25. #24
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    Default Re: Spark Plugs Info

    For whatever reason the idle is now smoother and I'm back to a combined 29 MPG. Think I'll leave well enough alone and not pull the plugs to check the gaps. A "pre-gapped" plug from NGK should be OK.
    Thanks.

  26. #25
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    Default Re: Spark Plugs Info

    Good to hear! Definitely strange.

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    Default Re: Spark Plugs Info

    Strange indeed! Shortly after posting the cold start roughness returned and gas mileage tanked. Finally took it to the dealer. They had my car for 4 days stating they couldn't "figure it out" and had to call in a factory mechanic to give advice! All the mechanics are VW certified but they finally decided one of the coil packs wasn't seated to the plug well enough. If that was truly the problem then I'll take the blame; but $145.00 later seems a bit much for their "labor" and inability to figure it out more quickly.

  28. #27
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    Default Re: Spark Plugs Info

    Quote Originally Posted by ghahn View Post
    Strange indeed! Shortly after posting the cold start roughness returned and gas mileage tanked. Finally took it to the dealer. They had my car for 4 days stating they couldn't "figure it out" and had to call in a factory mechanic to give advice! All the mechanics are VW certified but they finally decided one of the coil packs wasn't seated to the plug well enough. If that was truly the problem then I'll take the blame; but $145.00 later seems a bit much for their "labor" and inability to figure it out more quickly.
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  29. #28
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    Default Re: Spark Plugs Info

    True, but didn't have much choice. On a more positive note the NGK 1675 seems to be a great plug and you really can feel a "seat of the pants" difference in performance and MPG are as good or better then stock.

  30. #29
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    Default Re: Spark Plugs Info

    Based upon the information from the OP, I installed NGK PFR7S8EG spark plugs in my 2013 MK6 GTi. Overall performance is very good, with a smooth idle. It is unlikely that spark plugs would increase HP; therefore I don't understand why we should request dyno charts before green lighting this option.

  31. #30
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    Default Re: Spark Plugs Info

    Quote Originally Posted by Edmundo View Post
    Based upon the information from the OP, I installed NGK PFR7S8EG spark plugs in my 2013 MK6 GTi. Overall performance is very good, with a smooth idle. It is unlikely that spark plugs would increase HP; therefore I don't understand why we should request dyno charts before green lighting this option.
    it would be useful to see the a/f numbers

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