Plugs..... - GM Forum - Buick, Cadillac, Chev, Olds, GMC & Pontiac chat


1992-1999 Series I L27 (1992-1994 SE,SLE, SSE) & Series II L36 (1995-1999 SE, SSE, SLE) and common problems for the Series I and II L67 (all supercharged models 92-99) Including Olds 88's, Olds LSS's and Buick Lesabres Please use General Chat for non-mechanical issues, and Performance and Brainstorming for improvements.

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Old 05-22-2006, 07:28 PM   #1
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Default Plugs.....

Anything I should know before swapping out my TR-55 NGK plugs with TR-6'*?

For those who don't know what I'm talking about, TR-55'* are one heat range colder than stock, and TR-6'* are two heat ranges colder than stock.

I plan on gapping them at .55" unless I'm told differently. Something that I should have done with the TR-55'* but didn't know until it was too late, so they were gapped a .60" (stock gap) when I put them in.
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Old 05-22-2006, 11:08 PM   #2
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Its .055 and .060
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Old 05-22-2006, 11:12 PM   #3
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TR55'* should be .055" in an L67.
TR6'* get dicey. According to NGK, they should be at .045" to .050". I lean to the high side because I have hotter coils.
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Old 05-22-2006, 11:24 PM   #4
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May I ask why you are going colder?
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Old 05-22-2006, 11:52 PM   #5
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Wow...thanks for the input when i gave up on waiting and tossed them in at .55"

ARRRGHHH I knew this was gonna happen.

Oh well, car'* running better with them. The 55'* came out lookin alright.

She scoots from a roll just a lil better now...which is what I was looking for.

John....I'm trying to cool things off under there, it'* warming up....

Plus got some good mod'* on the table that may actually really utilize them.
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Old 05-23-2006, 09:25 AM   #6
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My opinion is that the gap should get smaller based on boost not heat range. 3.2 - 3.4 pulleys should run .055. 2.8 to 3.2 should run about .050 - .052. 2.7 and smaller should run .045 to .050. This is based on my (and INTENSE'*) personal experiences.
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Old 05-23-2006, 04:45 PM   #7
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Quote:
Originally Posted by Rogue
My opinion is that the gap should get smaller based on boost not heat range. 3.2 - 3.4 pulleys should run .055. 2.8 to 3.2 should run about .050 - .052. 2.7 and smaller should run .045 to .050. This is based on my (and INTENSE'*) personal experiences.
Are those numbers based off a * II application, or my * I application Todd?
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Old 05-23-2006, 04:58 PM   #8
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Quote:
Originally Posted by LakevilleSSEi
Quote:
Originally Posted by Rogue
My opinion is that the gap should get smaller based on boost not heat range. 3.2 - 3.4 pulleys should run .055. 2.8 to 3.2 should run about .050 - .052. 2.7 and smaller should run .045 to .050. This is based on my (and INTENSE'*) personal experiences.
Are those numbers based off a * II application, or my * I application Todd?
Nate, I think he means Series 2 based on the pulley sizes and Intense doesn't support much Series 1 stuff.
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Old 05-23-2006, 05:01 PM   #9
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I know....But he also mentioned:

Quote:
2.7 and smaller should run .045 to .050
Sure the * II maybe able to run that small, i dunno for fact...but It'* merely a ? from me and other inquiring minds.
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Old 05-23-2006, 05:10 PM   #10
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His reference point is actually boost levels. Not pulley size per se.

Find out what your boost peak is, then relate that to equal boost on a S2, find out what pulley size produces that boost, and pick your number.
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