Author Topic: 1969 Z28 spark plugs  (Read 1242 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: March 19, 2024, 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: March 19, 2024, 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

Kelley W King

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Re: 1969 Z28 spark plugs
« Reply #6 on: March 19, 2024, 11:24:46 AM »
I haven,t seen one of those spark plug cleaners since my high school auto mechanics shop class in the 70,s. It worked really well. My 68 GTO would misfire pretty bad above 3k RPM, a trip through the cleaner for the plugs would clear it up nicely.
69 Z28 RS Scuncio Hi Performance
69 SS L78
67 SS Chevelle
64 Corvette
66 GTO Tiger Gold
77 Trans Am Special Edition

wisemanz28

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Re: 1969 Z28 spark plugs
« Reply #7 on: March 20, 2024, 11:55:54 AM »
Id like to have one of those spark plug cleaners in my shop. Where did you find that one Indy?

169INDY

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Re: 1969 Z28 spark plugs
« Reply #8 on: March 20, 2024, 02:55:22 PM »
These AC (GM) Service versions  and Champion Spark plug versions are avail on line and at local swap meets, from NOS in a Box $150 to 20 dollar rusted junk out there.

Before Shot attached.
Jim
68 SS/RS L35 Th-400 LOS
69 Pace Car L48 Th-350 LOS
68 Z28 M21 LOS

maroman

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Re: 1969 Z28 spark plugs
« Reply #9 on: March 20, 2024, 05:40:56 PM »
Are these sand blasters like the Champion unit? Yours looks great.
Doug  '67 RS/SS 396 auto I know the car since new

169INDY

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Re: 1969 Z28 spark plugs
« Reply #10 on: March 21, 2024, 05:48:52 PM »
Yes, Champions are on a stand and rectangle, Same theory of operation.

Thanks.

Garage Art. Like, Gas Pumps, Oil Lubsters, Vintage Cabinets, Clocks, Neon and steel signs, Fun Stuff for sure.

We need to start a Thread in Garage talk
Jim
68 SS/RS L35 Th-400 LOS
69 Pace Car L48 Th-350 LOS
68 Z28 M21 LOS