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#1
09-17-2010, 01:48 AM
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Re: 72 TA : New Project
Looks like those plugs are running a little hot. Considering this is just from "normal" driving, the heat line looks like it is pretty far past the bend on the ground electrode, and are there tiny little black specs on the porcelain?
What heat range are they? Compression ratio? Where's the timing at, and have you heard any audible signs of detonation? (Sorry for all the questions, but Pontiacs are known to be finicky about their tune) Eric 
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#2
09-17-2010, 02:14 AM
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Re: 72 TA : New Project
No specks on porcelain. Stock compression of 8.5 to 1. They are the stock heat range 2869 platinums. What would a colder heat range be with NGKs? No detonation, even with 91 octane. Initial timing at 12 before TDC. Total timing around 36 degrees if I recall correctly. Has a minor nosing over/power loss at around 5000 rpm.
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