Topic: Sparkplugs
in Forum: C3 Engines
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Gold MemberPalm Harbor, FL - USA
Joined: 11/27/2022
Posts: 8
Vette(s): 1972 small block convertible resto-mod
Who uses which plugs at what heat range on C3 small blocks that are slightly modified (headers, mild aftermarket cam, etc.) I am curious because my AC Delcor 44Rs show up mighty blackened!. Thanks
Yellowperil
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Lifetime MemberModerator
Duncanville, TX - USA
Joined: 11/8/2003
Posts: 20224
Vette(s): #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
Dry black, or wet black? Dry might be too hot of a plug, wet leads me to think it's running a wee bit rich. IIRC, I run 43TS in my '74 w/stock 350/4spd. I would have to actually look to see, but my memory seems to think mine are 43TS plugs. The R44T is the factory recommended plug.
Joel Adams
C3VR Lifetime Member #56 
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in Forum: C3 Engines
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