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New plugs this weekend. What gap??

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Old 11-07-2013, 11:12 PM   #1
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Default New plugs this weekend. What gap??

I am thinking .25 on these new sp534's. Running a 5star 91 tow tune and seeing almost 19lbs of boost settling down to about 17.5. Most other turbo forums regardless of brand recommend .25-.28 when running that kind of boost in a higher compression motor like the ecoboost. Anything above that results in spark blow out!!
2013 SCREW 3.5Ecoboost Lariat,3.31 gears, chrome package,20's,5 Star tuned.
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Old 11-07-2013, 11:19 PM   #2
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I would go with .028. I have only seen .025 recommended with the Brisk Silver Racing plugs. Motorcraft recommendations have been ,028-.030.
2011 Ford F-150 XLT Candy Red Metallic 3.5L EcoBoost, SuperCrew 4x4, Max Tow, 5'7" Box, BedRug, Truxedo Lo Pro QT, SuperSprings, Bilstein HD shocks, Southern Speed Inc tuned, Full-Race Resonated Exhaust, Wagner Tuning IC, Reese 16K fiver hitch, Mohr Mfg SpareBumper
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Old 11-08-2013, 09:52 AM   #3
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I had been running .028 on my SP534's since June with zero problems and smooth idle. Monday I pulled them and narrowed the gap to .025 just for grins and giggles. Now mine seems to hold boost better at highest boost and I may even be getting a little better mileage. This on limited amount of driving.
2012 Platinum 4X4 Ecoboost with 3.55 elocker and every option available, except max tow. Red Candy metallic , Fold A Cover tonneau, Line-X bedliner, EZ down tailgate assist. Led lights under the bed cover. Aeroforce Interceptor gauge, S&B intake, Solo catless Downpipes, SSI custom tunes.
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Old 11-08-2013, 09:52 AM

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