LT1-LT4 Modifications 1993-97 Gen II Small Block V8

lt1 boost ngktr6 gap?

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Old Mar 13, 2012 | 02:53 PM
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Default lt1 boost ngktr6 gap?

as title says what gap should i run for a 8lb rear mount system with a stock motor with tr6
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Old Mar 13, 2012 | 03:28 PM
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i run .35, which is the factory gap i believe
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Old Mar 13, 2012 | 03:58 PM
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I would run .35. Stock gap is .50 fyi
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Old Mar 13, 2012 | 03:58 PM
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factory gap is like .55
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Old Mar 13, 2012 | 05:11 PM
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My set up = 0.39" gap on NGK TR6 IX plugs
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Old Mar 13, 2012 | 06:33 PM
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sorry to offend the factory chevy spark gap, i was refering to the NGK tr6's factory gap is set to .35.
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Old Mar 13, 2012 | 07:23 PM
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I run a boosted application. Anything over .030 and I blow em out....

I run .028 on a 1 degree colder plug....(colder than stock that is.)
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Old Mar 13, 2012 | 10:35 PM
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lol ok so i guess there is some play with this? .35 seems to be successful with people... will the lower the gap mean colder the burn?
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Old Mar 14, 2012 | 10:33 AM
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bumppp.. lots of different number here...
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Old Mar 14, 2012 | 11:28 AM
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what is your ignition setup?? that would be a large determining factor on what size gap you could run...
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Old Mar 14, 2012 | 11:54 AM
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all msd.. from the coil, wires, opti, 6al
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Old Mar 14, 2012 | 12:54 PM
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Lower the gap means less chance of spark getting blown out. Bigger gap is better but too big will blow out spark. I don't think I would go over .40 but if you wanna try anywhere around 30-38 I think you would be fine. Just check them after running it and see how they look. You will tell in how the car runs if it's blowing out the spark.
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Old Mar 14, 2012 | 01:59 PM
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with the msd coil and the 6AL you could do .040. instead of running the TR6's you could run the BR6ef which is a non-projected tip plug and they resist blowing out more than the projected. Br6's have the same heat range but are non-proj. also less chance of cracking the porcelain... Just a idea to ponder...
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