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Colder Plugs on Stock Motor

Started by River8478, May 02, 2019, 04:21:59 PM

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River8478

May 02, 2019, 04:21:59 PM
Hello all,

I've recently a '14 MKS EB that's still under warranty for ten months or about 6000 more miles. As soon as the warranty is up, I plan on flashing a tune to the car and installing a 3 bar MAP I bought. With this, of course, also comes colder plugs. With the mileage the car has, I'd like to replace the plugs now as part of my "new to me" car maintenance, but don't want to have to replace them again in four months when I hit 70,000. Would I be looking at any significant adverse effects running a one-range colder plug on a stock car until I flash a tune to it? Thank you all!

SHOdded

#1
May 02, 2019, 04:31:22 PM
Welcome!

The MKS will run richer in the meantime as the stock tune does not accommodate the colder plug.  Might see fuel economy dip a bit.  But nothing detrimental to the engine in the short run. Personally, I would just wait till ready to flash a tune, do it all at the same time.
2007 Ford Edge SEL, Powerstop F/R Brake Kit, TXT LED 6000K Lo & Hi Beams, W16W LED Reverse Bulbs, 3BSpec 2.5w Map Lights, 5W Cree rear dome lights, 5W Cree cargo light, DTBL LED Taillights

If tuned:  Take note of the strategy code as you return to stock (including 3 bar MAP to 2 bar MAP) -> take car in & get it serviced -> check strategy code when you get car back -> have tuner update your tune if the strategy code has changed -> reload tune -> ENJOY!

sholxgt

#2
May 02, 2019, 04:33:36 PM
I would get with your planned tuner.  I think most suggest running the Motorcraft SP534's tuned or not.

On my '13 MKS, I ran those plugs gapped at .030 when tuned and when running stock tune.  They worked perfect.
Current - 2019 F150 Platinum FX4 3.5 EB
Formerly -2013 MKS Ecoboost Premium
PPE Catted DP's, 170 Reische TS, K&N Drop In, AJP Tune only at track - 12.87@106

glock-coma

#3
May 03, 2019, 12:21:57 AM
I was running sp542's on the stock tune for around 3 weeks when I was letting a friend borrow the SHO.
No issues. They are gapped @.030
2010 red candy metallic non PP 402B
AJPTURBO 2 BAR Tune Stock 14.1@100.3 / Tuned 12.83@107.7
K&N panel, RX OCC, Sp-534 @.30 Tint 50%F-35%R BOV bypass
1997 SHO silver frost (sold)
1990 SHO triple black 5-speed (saved my life)

802SHO

#4
May 03, 2019, 05:13:32 AM
Quote from: River8478 on May 02, 2019, 04:21:59 PM
Hello all,

I've recently a '14 MKS EB that's still under warranty for ten months or about 6000 more miles. As soon as the warranty is up, I plan on flashing a tune to the car and installing a 3 bar MAP I bought. With this, of course, also comes colder plugs. With the mileage the car has, I'd like to replace the plugs now as part of my "new to me" car maintenance, but don't want to have to replace them again in four months when I hit 70,000. Would I be looking at any significant adverse effects running a one-range colder plug on a stock car until I flash a tune to it? Thank you all!

Welcome River8478 and you picked a good one that MKS sure is nothing to mess with!  I wish you a lightning fast next 6000 miles so you can experience what some light mods will do on our engines....youll be blown away and like many of us be itching for MORE
IG @802SHO 2010 SHO non PP, Tuned by AJP Turbo, 109 Octane + VP C85 for E30, Ported GH Gen 3 upgraded turbos, Ported 13+ Exhaust Manifolds, Custom FM IC TreadStone TR10C, EPP Hot Pipes, EPP Dual CAI, XDI35 HPFP, Deatschwerks 300C LPFP, Alky Control Methonal Injection, Alky dual nozzle upgrade, Zex Nitrous dual dry shots, Dicunzolo Gen2 torque mounts, MSD Coils, SP542 .026, 160 T, 3bar, Phenolic Spacer, Braille Lightweight Battery, Kirky Lightweight Racing Driver Seat, Catless Downpipes, custom stainless 2.5" double xpipe w/muffler deletes 4" quad tips, UPR Dual Valve Catch Can, 13+ PP Trans Cooler, Econoaid throttle Body Booster, Bravado Tribute 20x9.5 + 32 offset Wheels, Nitto NT555R Front Tires, Continental Extreme Contact DW Rear Tires and all are 275/35/20, H&R Springs all around w/rear cut 1/2", 1" hubcentric wheel spacers m14 1.5 stud/lug conversion, R1 Concepts Geomet slotted/drilled rotors with Heavy Duty Semi Metallic pads, Aeroforce Interceptor Gauge.
Currently World's Fastest Ecoboost SHO
11.063 @ 123.17 MPH!  NED 10/10/20

River8478

#5
May 03, 2019, 08:32:08 AM
Thanks for the advice everyone. I'll probably just pick up the plugs and wait to put them in.
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