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Gapping for boost

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Old Aug 9, 2011 | 08:21 PM
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Default Gapping for boost
i have heard to gap spark plugs at .032-.035 is that correct, if not please let me know what every one is thinks

thanks guys
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Old Aug 9, 2011 | 08:39 PM
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.025 for me on br7's
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Old Aug 9, 2011 | 09:01 PM
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same as rotary1307cc
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Old Aug 10, 2011 | 05:47 AM
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depends on boost level.

.025 is good for low/moderate boost, but for high boost you need to be tighter, e.g., I run .018
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Old Aug 10, 2011 | 06:06 AM
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Originally Posted by Fireball
depends on boost level.

.025 is good for low/moderate boost, but for high boost you need to be tighter, e.g., I run .018
Exactly. I run my BR7EFs at .025 at 16 psi. More boost = less gap.
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Old Aug 10, 2011 | 06:31 AM
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Question
Originally Posted by lbm13186
i have heard to gap spark plugs at .032-.035 is that correct, if not please let me know what every one is thinks

thanks guys
How much boost are you going to run? Bob
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Old Aug 10, 2011 | 11:48 AM
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BR7EF's 12-14 psi .28 gap..
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Old Aug 10, 2011 | 02:17 PM
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tr6 @ .034 with 8lbs. Runs good IMO, Is this worng???
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Old Aug 10, 2011 | 02:35 PM
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Originally Posted by JRENIGAR
tr6 @ .034 with 8lbs. Runs good IMO, Is this worng???
Nope, you should be just fine. Bob
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Old Aug 10, 2011 | 06:21 PM
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.025 for me...was getting blow out at .032.
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Old Aug 13, 2011 | 11:25 AM
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im planning on starting at 8-10 lbs to brake in the motor then step it up after to 12-14 lbs
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Old Aug 13, 2011 | 04:02 PM
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running 10 lbs, 11.3:1 compression, E85, .021 gap
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Old Aug 18, 2011 | 08:18 AM
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I have 10 lb on a Vortech V-9, had NGK TR55 at 0.05 with some problems at idle, went to a tuner & he told me to switch to TR6 with .035 gap, now it runs like **** - AFR stays pegged down at 10. Maybe something else failed, will get it diagnosed next week. Meanwhile Vortech says "to use stock heat range and gap unless heavy-duty use". Since this is my DD I'm gonna change back to stock-ish plugs this weekend just to see if it works. But god help me, I hate changing those bastards.
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