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10-14-2022, 07:26 PM
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#15 | |
        
Drives: 2017 1SS 6spd Join Date: Jan 2011
Location: Utah
Posts: 2,869
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Quote:
You may have noticed quality plugs now use a plastic sleeve not just to protect the threads but to maintain the gap between the central electrode and side electrode (ground). But it is important to be aware manufacturers of iridium plugs discourage manual gapping for fear of damaging the iridium coating on the central electrode. Platinum used to be the magic metal for sparkplug longevity but now iridium is the metal of choice and is 6 times stronger and 8 times harder. It's also even more expensive, so the central "pin" on your iridium plug is just coated with the stuff. Scratch that thin coating and that pin will melt like a cheap birthday candle on a hot day. So proceed with caution. 
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10-14-2022, 08:54 PM
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#16 |
  
Drives: 2017 Camaro 2SS A8 Join Date: Aug 2018
Location: Petersham MA
Posts: 4,749
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To the OP, stock gap is fine on your car with minimal mods. Your tuner is being conservative as he doesn’t want to chase his tail with potential misfires but there’s no reason for you to have any with your mod list.
Under boost, I’d start at .035” at low boost (~6 psi or so) and start tightening it up the more boost you make. I’m at .028” with 16+ psi.
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2017 Chevy Camaro 2SS A8 Whipple 3.0, Mast Black Label heads, Fore triple in-tank pumps, 112mm TB, LPE +52% injectors, LPE BB HPFP, 15” conversion 1059 WHP/944 WTQ, 9.48@150
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10-14-2022, 09:20 PM
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#17 |
Drives: '20 ZLE Join Date: Jun 2020
Location: Mile High
Posts: 3,558
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I'm at .028 but .025 is likely better for me. Pretty sure that's what KaTech uses. But these tight gaps make for very rough idles.
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'20 ZL1 1LE A10,
OEM short block, LME heads/valve train, E2650. 100+ octanes, no eth, no meth, no N2O. 2/23 - 1031/1004 wheel. 4/23 - 1.41/9.61/145 at DA 7000 ft. (only made five passes). 2/24 - LME 390, E2650, FBO, 100 oct.; 1116hp/ 1063tq; 109 oct. dyno next. |
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11-24-2022, 09:04 PM
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#18 |
 
Drives: 2016 Camaro Join Date: Oct 2017
Location: Texas & Uncle Sam's Choice
Posts: 123
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Richard Holdener posted a YouTube dyno video about spark plug gap. He ran from .010" to .100" on a stock GM 5.3-liter engine. The .100" gap made 5-6 more horsepower than the smaller .010" gap.
Here's the video link: https://youtu.be/_6qzd08D7ow
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2024 Chevrolet 3500HD Z71, LTZ, 4x4, 6.6 ltr. L5P long-bed.
2016 Camaro 2SS Six-speed, Hotchkis sway bars, Eibach .750" drop springs, Mamo throttle body, E85, BMR stuff. 2006 Quicksilver 6-speed GTO ERL LS3-430, All-Pro 285cc heads, 262/273 .758/.742 116+3 cam, Sheet-metal Intake, 70lb Siemens injectors, SLP, GMM Ripshifter, QA1 Coil-overs front and rear, nylon suspension bushings, Hotchkis, RPM Trans, SPEC twin clutch, SpinTech, Kooks 1 7/8 -2.0", BMR drive train, Kaaz 3.91, Lingenfelter CAI, Baer brakes, mini-tubs, E85. |
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11-24-2022, 10:42 PM
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#19 |
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Account Suspended
Drives: 21 ZL1 Join Date: Feb 2022
Location: South East
Posts: 662
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I run mine in my maggie 2650 at 15psi .040. I have the 6510s. They are pregapped at .040 and I run those with MSD wires. No issues, no misfires.
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