Re: Spark Plug Upgrade
No Recommendations, but...,
I have a big cam, 9.6 to 1 compression, and I have aluminum Edelbrock heads and went from a Champion RC12YC to a hotter RC14YC (40 gap) and put in a hotter thermostat - I can't remember if it was a 180 or 195. With my MSD digital 6 plus and the HEI coil, this allowed me to clean up my idle more. A better burn at idle, I could lean it out more, close the throttle blades a little more and get rid of any smell. The idea is to get the aluminum heads at the optimum temperature for burning fuel at idle. Also, running a vacuum advance at idle helps a lot for drivability with a big cam.
Note: I have a huge griffin radiator that never gets hotter than the thermostat even with the air conditioning on.
Note2: If you have iron heads with big compression, this may not work for you, going to a hotter plug and hotter thermostat can easily give you pre- detonation, so, you have to be careful...
1970 Chevelle SS396 (408), Fathom Blue,
Original Block & Forged Crank, KB Pistons, Edelbrock 6045 Heads,Comp Cam 292H, March Serpentine, RPM AirGap,750HP,100hp Nitrous
A/F Wideband,Tremec TKO 600, 12 bolt,
30 spline Moser Axles, Richmond 3:73's, Hotchkis control arms, swaybars, springs, Wilwood 12" rotors D/S, 4 piston calipers