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Topic: Plug recommendation

in Forum: C3 Engines

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Plug recommendation (1/6)
 5/25/23 2:27pm
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Sacramento, CA - USA

1976 black T top

Joined: 5/22/2023
Posts: 3

I just installed some Edelbrock E street aluminum heads and they recommend Champion RC-12YC spark plugs. These are quite long and not a lot of header clearance. Is there a spark plug with a shorter porcelain part that any of you would recommend that will fit these heads? Thanks

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Re: Plug recommendation (2/6)
 5/25/23 9:49pm
Adams' AppleLifetime Member
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Duncanville, TX - USA

#1-1974 L-48 4spd Cp Med Red Metallic/Black deluxe int w/AC/tilt/tele./p/w-p/b/ Am-Fm/map light National/Regional/Chapter NCRS "Top Flight" #2-1985 Bright Red/Carmine Cp.L-98/auto Member: NCRS, NCRS Texas, Corvette Legends of Texas

Joined: 11/8/2003
Posts: 20122

Here's a can of worms cross-reference for that plug #. I personally would not run a Champion plug in anything but lawn equipment, but that's just me. I prefer to use OE brand plugs...AC/Delco for GM products. Only other brand I would use is NGK.


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Re: Plug recommendation (3/6)
 5/31/23 12:08pm
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Brentwood, TN - USA

1982 Collector Edition 1982 Coupe 1993 40th Anniversary

Joined: 10/17/2009
Posts: 4

I use NGK platinum in my 82 CE. I have found Delco plugs to be of questional quality since they have been manufactured overseas.

Re: Plug recommendation (4/6)
 5/31/23 12:37pm
F4GaryGold Member
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Grapevine, TX - USA

1972 LT-1 convertible with factory air.

Joined: 8/26/2006
Posts: 1399

CE82GUY said:

I use NGK platinum in my 82 CE. I have found Delco plugs to be of questional quality since they have been manufactured overseas.

I think they are made by NGK.


I have NGK V-Power standard spark plugs in my 72, but I have an MSD 6A spark box and distributor.



Re: Plug recommendation (5/6)
 10/5/23 7:59am
Phil's-StingrayGold Member
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1975 L48 Corvette Stingray convertible with hardtop, modified & restored, new medium cloisonne paint, interior, 350 cid 330 hp with TH700R4 automatic transmission 3:36 differential ratio, all power & ac and the underside. A very nice touring car.

Joined: 1/12/2020
Posts: 22

I use only AC Delco Products, R44TS spark plugs in my 350 / 330 mouse and they perform well with my with iron 2.02 heads.

Re: Plug recommendation (6/6)
 10/15/23 8:10pm
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Germansville, PA - USA

1974 Coupe 358ci 4 speed Black w/Medium Saddle interior w/79 custom leather seats. . 1999 C5 Convertible, 6 speed, Atomic orange, Oak interior.

Joined: 1/28/2010
Posts: 858

See if any of these plugs will work for you. I have them in my .040 over small block and had to use the Accel shorty plugs because of the headers. No problem after several years,.

Chevrolet Parts and Accessories at Summit Racing



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