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BF 32 is the installed and recommended plug, I put on over 80,000 miles on my KR, never fouled a plug, put on 10,000 miles on my 66 427 Cobra, never fouled a plug, put on over 10,000 miles on my 72 Pantera, never fouled a plug, I say old wives tale!
The issue with BF32's is they are a cold plug and the vehicles usually aren't driven enough. All dual quad cars run rich at idle. I'll guarantee my ignition isn't weak with the igniter II and matching coil. The NGK U groove is a much better plug than the BF32, and they are NOT available from the parts store. Jay Brown and a couple other FE builders will also tell you to stay away from the BF32. If you're competing in Concours, then you might want to run them. Otherwise its plain stupid to waste 7-10 a plug on stock poor plugs.
Quote from: 1967 eight barrel on February 28, 2019, 09:42:34 PMThe issue with BF32's is they are a cold plug and the vehicles usually aren't driven enough. All dual quad cars run rich at idle. I'll guarantee my ignition isn't weak with the igniter II and matching coil. The NGK U groove is a much better plug than the BF32, and they are NOT available from the parts store. Jay Brown and a couple other FE builders will also tell you to stay away from the BF32. If you're competing in Concours, then you might want to run them. Otherwise its plain stupid to waste 7-10 a plug on stock poor plugs.Mine doesnt run a dual quad as its a KR with the Holley 735.My issue is it currently backfires underload but drives along ok until I accelerate hard then it goes off with backfiring. Carby has been rebuilt, timing set, new points and condenser, coil is fine so the only thing left is the plugs.I just want to make sure i put the right ones in due to the difficulty in changing them. If it was my 66 GT350 it wouldn’t be an issue as access is easy.So just to be sure is BF 32 the right ones that won’t give me issues??
Hi Bob,Thanks for your prompt reply.The car has origina 32,000 miles on it.It doesnt get driven much at all. Lucky if I do 500 miles in a year and they would be highway miles.I don’t drive it hard so maximum horsepower isn’t a priority.Just the occasional squirt when I take it out and it warms up.So BF42??Ross