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10-15-2022, 05:28 PM
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#1 |
 
Drives: 2017 Chevrolet Camaro ZL1 M6 Join Date: Jul 2020
Location: OR
Posts: 479
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What spark plug gap are you running?
I am running LTR7IX-11 NGK’s gapped at .043. I have been advised to run this gap. The theory goes that the wider the gap the better the combustion. What do you guys think?
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JRE Terminator Rough Idle Cam
Magnuson 2650 - 15% lower, 90mm upper FIC+30% DSX Flex fuel/Low side NW 103mm TB/Roto-Fab CAI Monster S Series Elite E2-X 2" TSP LT's BMR:BK063, BK060,TCA061, UTCA060, UTCA063 Weld Beadlocks/17" NT5R2 |
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10-15-2022, 05:52 PM
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#2 |
         Drives: 2021 Red Hot ZL1 Join Date: Sep 2020
Location: GA
Posts: 3,493
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In theory you would always want to run the widest gap that's still effective without losing your spark, but as you increase boost, you will have to shorten the gap. Hate to say it, but it's a bit of trial error unless you have someone that has been there done that and can tell you which gap to use. Most shops will know what works and what doesn't for the given mods.
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10-15-2022, 07:00 PM
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#3 |
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Moderator
Drives: 2017 Camaro 2SS A8 Join Date: Aug 2018
Location: Petersham MA
Posts: 6,203
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I’m really surprised JRE recommended a gap that wide on a modded and boosted engine. What kind of boost levels are you seeing?
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2017 Chevy Camaro 2SS A8 Whipple 3.0, Mast Black Label heads, ATI 8L90, Fore triple in-tank pumps, 112mm TB, LPE +52% injectors & BB HPFP, TooHighPSI/Katech port injection, 15” conversion 1066 WHP STD/1027 SAE, 9.10@152.5 (new times coming)
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10-15-2022, 09:35 PM
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#4 |
  
Drives: 2016 1SS NFG A8 Join Date: Aug 2017
Location: 46804
Posts: 7,561
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If it's not missing up top then don't worry about it. You will know when the gap is too wide.
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 2016 NFG SS A8/Whipple 2.9/Fuel System/Flex Fuel |
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10-15-2022, 09:55 PM
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#5 |
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Account Suspended
Drives: 21 ZL1 Join Date: Feb 2022
Location: South East
Posts: 662
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.032 for my 6510s on my maggie 2650 ZL1. Runs like a raped ape and idles smooth as glass.
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10-15-2022, 10:07 PM
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#6 | |
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Drives: 2017 Chevrolet Camaro ZL1 M6 Join Date: Jul 2020
Location: OR
Posts: 479
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Quote:
__________________
JRE Terminator Rough Idle Cam
Magnuson 2650 - 15% lower, 90mm upper FIC+30% DSX Flex fuel/Low side NW 103mm TB/Roto-Fab CAI Monster S Series Elite E2-X 2" TSP LT's BMR:BK063, BK060,TCA061, UTCA060, UTCA063 Weld Beadlocks/17" NT5R2 |
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10-15-2022, 10:10 PM
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#7 | |
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Drives: 2017 Chevrolet Camaro ZL1 M6 Join Date: Jul 2020
Location: OR
Posts: 479
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Quote:
__________________
JRE Terminator Rough Idle Cam
Magnuson 2650 - 15% lower, 90mm upper FIC+30% DSX Flex fuel/Low side NW 103mm TB/Roto-Fab CAI Monster S Series Elite E2-X 2" TSP LT's BMR:BK063, BK060,TCA061, UTCA060, UTCA063 Weld Beadlocks/17" NT5R2 |
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10-16-2022, 03:23 AM
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#8 |
 Drives: 2018 Camaro ZL1 A10 Join Date: Feb 2022
Location: Dubai, UAE
Posts: 90
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0.031" (stock gap for denso ITV27). Maggie 2650 at 20 psi
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10-16-2022, 01:22 PM
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#9 |
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Red Bull
Drives: 2017 Chevy ZL1 Join Date: Dec 2020
Location: Evansville, IN
Posts: 186
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.40 gap for my 6510s with cam and FBO.
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