Spark Plugs
Close
Login to Your Account
Kia Forte Turbo Forum - Powered by vBulletin

Spark Plugs

This is a discussion on Spark Plugs within the Kia Forte Turbo Maintenance forums, part of the Kia Forte Turbo Garage category; So I was reading on the VT forums and someone posted about NGK plugs with our cars and also using their race plugs since the ...

Page 1 of 31 12311 ... LastLast
Results 1 to 10 of 302
Like Tree127Likes

Thread: Spark Plugs

  1. #1
    Super Moderator
    Member #
    96
    Join Date
    Oct 2014
    Location
    SoCal
    Posts
    3,021
    Thanked
    967 times
    Member #
    96
    Liked
    967 times

    Spark Plugs

    So I was reading on the VT forums and someone posted about NGK plugs with our cars and also using their race plugs since the are recessed. He talked to a rep there and this is what he found out

    Copied from Velosterturbo.org

    "I spoke with a technical rep at NGK last Friday about using these plugs on our car. The reason for the call was to confirm I had the proper gap and to find out what could be causing the carbon fouling I had after only a month of use. He literally LOL'd when I told him I was using them for my daily driver. He went into great detail explaining why their website does not offer a plug for our car and also why their racing plugs should NEVER be used on a daily driver. The absence of the projected ceramic tip completely prevents the plug from being able to self clean and combined with low speed driving, the expected life you should see out of this plug is around 100-300 miles, depending on how much stop and go driving you do. I can't tell you how much he was stressing THIS PLUG IS NOT INTENDED FOR DAILY DRIVING USE! Its for racing ONLY! Quarter mile and circuit races where the engine will be used very aggressively is where it shines. Any slow/low speed engine use on these plugs causes them to foul out, fast, after which they recommend throwing them away. The fouling has caused lots of spark related problems for people trying to use them as daily driver plugs. I can't remember exactly what they all were, but they were NOT GOOD. These plugs cannot be sandblasted and reused safely, and he stressed the point that I was not being told that because he was not trying to sell me some other plug to replace it with because NGK does not recommend the use of their plugs on our car. He repeated that one a couple times as well because I told him our cars come with NGK plugs, but he would not recommend even reinstalling the stock plugs. He just kept saying they DO NOT offer a plug that is appropriate for our car, they do for the N/A, but not the Turbo. He also mentioned that the race plugs do not have the reach into the chamber the the OEM plugs have, so even in the case that I wanted to use a set of racing plugs on our car, these are not the right length and they do not offer a race plug with that reach. I will be either going with the Autolite XP570(1, 2 or 3...still trying to find an Autolite spec with the actual heat range for these, I want 8) or the HKS M40XL plugs after that conversation."

    So after reading this I got a bit worried since the guy said we shouldn't be using any NGK plugs in our car. Well I have been running the NGK 1422's for a while now. So this got me thinking about them because on cold start I always have misfires and can hear it popping out the exhaust. It has done this since new with the stock NGK plugs also. Well I searched around and found out the Autolite XP5701 is their cold plug that is comparable to the NGK 1422. For those on stock setup with no tune you can use either the XP5702 or XP5703.

    Since I put these in my car I have no misfires on cold start and my car runs so much better. Mine are gapped to .028 and is running great. Today was my first day on the fwy with them and the car gets up to speed a lot better and is super smooth when crusing and if I have to get into the throttle it just pulls harder now. I would recommend these for the price. They were $27 at the local auto parts store

    Edit:

    Here is a description of what plugs work with what...

    XP5703 Stock replacement
    XP5702 Mildly modified to full bolt ons (i.e intake, dp, exhaust, fmic, 60mm tb, ect)
    XP5701 Tuned to highly modified

    Heat Range Explanation
    Typically the heat range for NGK Spark Plugs varies from 2-11. This number indicates the thermal characteristics of a spark plug, or how ‘hot’ or ‘cold’ a spark plug is. The term hot/cold is commonly used to describe whether a spark plug heats up easily (hot) or whether it provides resistance to heating up (cold).

    Generally, low power engines such as lawn mowers don’t produce a large amount of heat, hence use a low heat range (or hot) spark plug such as a 4 heat range. This means the spark plug will heat up easily and reach its optimal operating temperature. High performance engines on the other hand produce a large amount of heat, hence a high heat range (or cold) spark plug such as a 10 heat range needs to be used to resist the heat developed by the engine.

    Several factors influence the heat range of a spark plug, although typically the insulator nose design provides an indication of the heat range of a spark plug.

    When a spark plug absorbs heat produced from combustion, the heat is transferred through the center electrode and insulator nose to the metal shell, which then transfers the heat into the engine casing and circulating coolant.

    Attachment 1317

    A low heat range (or hot) spark plug typically has a long thin insulator nose which will heat up easily however will not dissipate readily to the metal shell (above left). Conversely, a high heat range (or cold) spark plug has a short thick insulator nose which will dissipate heat much easier (above right).

    When the heat rating is too high:

    The spark plug temperature remains too low and causes deposits to build up on the firing end; the deposits offer an electrical leakage path that gives rise to loss of sparks.

    When the heat rating is too low:

    The spark plug temperature rises too high and induces abnormal combustion (pre-ignition): this leads to melting of the spark plug electrodes as well as piston seizure and erosion.

    NGK Spark Plugs pioneered the use of a copper cored electrode in 1958, which enables a spark plug to heat up quickly and also dissipate heat quickly giving an ultra wide heat range. It is essential to use a spark plug that fits a specific engine and its conditions of use.

    As spark plugs are positioned in the head of an engine, their analysis can give a good indication of how your engine is operating.

    Directly from the Technical Information page at NGK
    Last edited by Forte5; 09-10-2015 at 09:12 AM.
    15 F5 A/T
    Ask me about my mods. To much to list
    Instagram: Forte5t
    Team Hybrid

  2. #2
    Member Mikeysweettricks's Avatar
    Member #
    295
    Join Date
    Jul 2015
    Location
    NJ
    Posts
    82
    Thanked
    57 times
    Member #
    295
    Liked
    57 times
    After reading this I did a little searching around and looks like the Autolite XP 5703 will work for our car. I'm wondering if I should wait to replace the spark plugs until after I get the tune. Good read and find btw!
    Forte5 likes this.
    2015 Kia Forte5 SX

    Current Mods:
    6th CAI
    6th Resonator delete
    6th Shifter cable bushings
    3" Tork catless DP
    Add w1 catch can
    Debadged
    Carbon fiber broken "K" emblems
    EZ lip front bumper/side skirts
    18" ICW Racing Banshee Matte black rims
    Custom 3 pod pillar

    Future Mods:
    Tork stage 1 tune
    FMIC
    Muffler delete
    Gloss black vinyl roof

  3. #3
    Super Moderator
    Member #
    96
    Join Date
    Oct 2014
    Location
    SoCal
    Posts
    3,021
    Thanked
    967 times
    Member #
    96
    Liked
    967 times
    Quote Originally Posted by Mikeysweettricks View Post
    After reading this I did a little searching around and looks like the Autolite XP 5703 will work for our car. I'm wondering if I should wait to replace the spark plugs until after I get the tune. Good read and find btw!
    The XP5703 would be for stock tune. It depends on when you plan on getting the tune. If it won't be for a while then I would say for the $27 for all 4 of them would be good insurance to do now or later
    15 F5 A/T
    Ask me about my mods. To much to list
    Instagram: Forte5t
    Team Hybrid

  4. Remove Advertisements
    ForteTurbo.org
    Advertisements
     

  5. #4
    Super Moderator
    Member #
    96
    Join Date
    Oct 2014
    Location
    SoCal
    Posts
    3,021
    Thanked
    967 times
    Member #
    96
    Liked
    967 times
    So took these for a good drive yesterday and noticed on the fey the car runs so much smoother and less throttle input. My mpg actually went over 34 which was amazing because I have never seen that. So far these plugs are way better than ngk.

    Also make sure your spark plug gapper isn't worn. I found out mine was a tad worn and was off by about .03. Or get a feeler gauge instead
    15 F5 A/T
    Ask me about my mods. To much to list
    Instagram: Forte5t
    Team Hybrid

  6. #5
    Member
    Member #
    243
    Join Date
    May 2015
    Location
    Reno NV
    Posts
    39
    Thanked
    20 times
    Member #
    243
    Liked
    20 times
    So after reading this I took a drive down to the local O Riley s. I walked up to the guy at the counter and asked for a set of Autolite HKS 5701 plugs. He of course said he didn't list those. I said HKS instead of HK. He then asked if I new a different number I said how about NKG 1422. He looked that up as well. He didn't have those, but the HK 5701 Came up listed as the only option . He had 6 HK 5701 plugs in stock. I put them in and Forte 5 was correct my car runs better with those plugs. Thank you Forte 5. You helped me pick the correct heat range I needed 5701 cause I'm tuned. I was Confused with the N K G plugs heat range .
    Forte5 likes this.

  7. #6
    Senior Member lephoenix's Avatar
    Member #
    294
    Join Date
    Jul 2015
    Posts
    504
    Thanked
    103 times
    Member #
    294
    Liked
    103 times
    So to summarize,

    Ngk doesn't recommend the plugs for our car that we have stock.

    Auto lite XP5703 are a better stock replacement

    Auto lite XP5702 are 1 step colder good for those with mild tunes and pushing slightly more boost or timing than stock

    Auto lite XP5701 are 2 steps colder than stock and best for those tuned

    Sound about right?
    Obviously that's generalizing a bit.
    mr_sippi_forte, SXT and Forte5 like this.

  8. #7
    SXT
    SXT is offline
    Senior Member SXT's Avatar
    Member #
    235
    Join Date
    May 2015
    Location
    Miami
    Posts
    195
    Thanked
    99 times
    Member #
    235
    Liked
    99 times
    Welp, adding spark plugs as the next thing to do to my car. At least it's cheap and can be taken care real soon.
    Forte5 likes this.

  9. #8
    Senior Member Playwithmymind's Avatar
    Member #
    190
    Join Date
    Feb 2015
    Location
    Central Florida
    Posts
    981
    Thanked
    490 times
    Member #
    190
    Liked
    490 times
    Will be giving these a try today but using XP5702 for the few mods that are done.
    Forte5 likes this.
    2014 Forte Koup
    [SIZE=1]BC COILOVER KIT
    Engine - UNSURE WHAT IS GOING TO BE USED
    BREMBO BRAKES ALL 4 CORNERS
    THE BUILD IS ON HOLD
    #TOO_MUCH_INVESTED_TO_STOP_NOW
    2003 Ford Ranger
    Bagged with full custom suspension
    2004 Jeep WJ
    Mild Longarm Lift
    Big enough to look good but small enough to be practical
    Show only, sponsored for SQ competition

  10. #9
    Super Moderator
    Member #
    96
    Join Date
    Oct 2014
    Location
    SoCal
    Posts
    3,021
    Thanked
    967 times
    Member #
    96
    Liked
    967 times
    Quote Originally Posted by jsl15 View Post
    So after reading this I took a drive down to the local O Riley s. I walked up to the guy at the counter and asked for a set of Autolite HKS 5701 plugs. He of course said he didn't list those. I said HKS instead of HK. He then asked if I new a different number I said how about NKG 1422. He looked that up as well. He didn't have those, but the HK 5701 Came up listed as the only option . He had 6 HK 5701 plugs in stock. I put them in and Forte 5 was correct my car runs better with those plugs. Thank you Forte 5. You helped me pick the correct heat range I needed 5701 cause I'm tuned. I was Confused with the N K G plugs heat range .
    Your welcome! Glad I can help and your car is running better! I noticed after driving with them for a while that it got smoother in time and my mpg went up.

    Quote Originally Posted by lephoenix View Post
    So to summarize,

    Ngk doesn't recommend the plugs for our car that we have stock.

    Auto lite XP5703 are a better stock replacement

    Auto lite XP5702 are 1 step colder good for those with mild tunes and pushing slightly more boost or timing than stock

    Auto lite XP5701 are 2 steps colder than stock and best for those tuned

    Sound about right?
    Obviously that's generalizing a bit.
    That's about right. The xp5702 can be ran in a modded car with no tune or in stock form. I have read that the stock plugs burn a bit to hot for some people and they go 1 step colder and notice a nice increase of smoothness and power

    Quote Originally Posted by Playwithmymind View Post
    Will be giving these a try today but using XP5702 for the few mods that are done.
    Get those suckers in there! I think you will like them. not sure how they will match up to your HKS plugs but these are better than the crappy NGK plugs. I don't have on cold start anymore the popping out the exhaust which is really nice lol
    15 F5 A/T
    Ask me about my mods. To much to list
    Instagram: Forte5t
    Team Hybrid

  11. #10
    Senior Member honhon's Avatar
    Member #
    52
    Join Date
    Apr 2014
    Location
    Florida
    Posts
    1,067
    Thanked
    261 times
    Member #
    52
    Liked
    261 times
    so what is the 1 step colder plug for the car?



    Veloster Turbo AEM SRI (shortened from a CAI)
    6th Element Shifter Base & Cable Bushings - Cosmo Racing Short Shifter
    845 Motorsports Catless Downpipe (1st 14koup with it.) wrapped with DEI titanium
    Gutted rear cat - TurboSocks Rigid Collars - Mobius Dash Cam - TB & IM Coolant Bypass
    Rotella T6 Full Synthetic 5w40 Engine oil - Redline MT90 Full Synthetic Gear Oil
    Check out my channel: http://www.youtube.com/c/honhon05

Page 1 of 31 12311 ... LastLast

Home | Forum | Active Topics | What's New

Remove Ads

Sponsors

Posting Permissions

  • You may not post new threads
  • You may not post replies
  • You may not post attachments
  • You may not edit your posts
  •  

Search tags for this page

2016 kia forte5 sx spark plug problems
,
autolite xp5701
,
can your spark plugs foul out right after you put them in
,

difference between hot and cold spark plugs

,
kia k3 forte 2017 spark plug gap
,
running no gapping spark plugs on a turbo car
,

silzkr7e

,
spark plug gap tool autozone
,
xp5702 plug heat range
Click on a term to search our site for related topics.