Author Topic: 1969 Z28 spark plugs  (Read 204 times)

wisemanz28

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1969 Z28 spark plugs
« on: March 16, 2024, 12:27:17 AM »
Need opinions on my spark plugs , rich,lean, or just right? It was running rich and I just put 5 gallons of Cam2 in it and seems to be running great. The plugs were fouled before the Cam2. Previous to Cam2 I ran 93 octane gas.

GMAD_Van Nuys

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Re: 1969 Z28 spark plugs
« Reply #1 on: March 18, 2024, 06:59:31 PM »
A light gray/brown electrode is usual for a spark plug that is functioning properly on older high performance engines and your 1969 Z28 plug looks good to me. 

Delco115

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Re: 1969 Z28 spark plugs
« Reply #2 on: March 18, 2024, 09:44:58 PM »
Yes... this one looks good. And the best part is it's nice and dry. If the other 7 look like thus one, you're good!! And if that's the case, just check the gap and reinstall.

169INDY

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Re: 1969 Z28 spark plugs
« Reply #3 on: March 18, 2024, 10:09:45 PM »
After a thorough cleaning
Jim
68 SS/RS L35 Th-400 LOS
69 Pace Car L48 Th-350 LOS
68 Z28 M21 LOS

hugrz28

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Re: 1969 Z28 spark plugs
« Reply #4 on: Today at 02:22:03 AM »
Wow that looks fantastic Jim........nice job restoring it!

Dan

169INDY

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Re: 1969 Z28 spark plugs
« Reply #5 on: Today at 03:47:46 AM »
I Just wrote a Check to a talented Painter & Screen artist.
LoL

I shudder to put abrasive in it and actually use it. LoL

^^ Wiseman's Z28 Plugs look pretty good to me esp when compared to Champions troubleshooting plug reading guide.
Jim
68 SS/RS L35 Th-400 LOS
69 Pace Car L48 Th-350 LOS
68 Z28 M21 LOS