05-09-2005, 08:38 AM
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CC Member
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Join Date: Dec 2000
Location: Broken Arrow. OK ( South Tulsa), USA,
OK
Cobra Make, Engine: 66 COBRA FE 427 /4SP. (HCS Coupe w/ 408 Stroker and TKO 600 -sold)
Posts: 5,595
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Not Ranked
Choosing a colder spark plug
Okay guys help me out here. I posted this over on the Gasholes site but it was either to complicated or everyone was asleep.
I think I need to step down my spark plug temp range. My builder installed Autolite 3924 and I want to go down in temp to a colder plug. Assuming I wanted to stay with Autolites would I get a 3923 or 3922? Or if I was using Motorcraft #4 would a #3 be the next colder plug?
George, If I was still using your favorite plugs ACCEL 716 what would be the next colder plug?
Engine Vitals:
427 Center Oiler
11.6 : 1 Compression
Speed Demon Carb 750
Fuel 110 octane Sunoco
MSD-6AL-Billet Dist-Blaster Coil-8 mm Wires
Edelbrock Heads P&P, Blue Thunder Intake, Sig Erson Roller Rockers-Comp Cams Solid 607 Lift & 542 Dur 8 Deg Sep-Eagle H-Beam Rods,
Thanks.
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