sparkplug question for jay or barry or any builder

[fryedaddy]

jay,what sparkplugs did you say you used and if i remember right dont they have the flat seats with washers and would they work on iron cj heads with tapered seats?

[Ford428CJ]

Not Jay nor Barry... You have to use a tapered seat plug. If you need plug numbers, instead of the 45's. Let me know. Don't think the washers will work. JMHO

[fryedaddy]

i have tried 4 different plugs the first 1000 miles on my 428,not really happy with any yet.i used champions back in the 80s,but i dont know what to run now that im back in the game

[Barry_R]

I have been stupid, crazy busy the past several weeks.  Right now it looks like either four or five engines to dyno next week....

They have it covered on the taper seat deal - you cannot easily move away from that.  What is it about the plugs that you do not like?  Pretty common these days with unleaded and hot ignitions to have the plugs look darn near new even after lots of time.

[fryedaddy]

i tried a couple different carbs,played with the jetting,timing curve,etc.im just trying to get all i can out of it.i know a plug is a plug,i just need some encouragement toward a decent plug for a 500-550 horse 428 street motor.i dont care if i have to change them more often or not .just need some part numbers and brands.i bought some 99 cent auto 45s and the guy at auto zone laughed at me and said they were no good.i had some champion 11ys and they kept getting loose

[fekbmax]

Ahh, what happened to the good ol days of the BRF 32's and 42's .

[fryedaddy]

i couldnt find any of those in town.when i retire soon im going to get ,barry,jay or blair to build me a nice fe if they will.i have friends with sbc cars that i can barely run with.i would like to show up and surprise them with a couple hundred extra horses!

[fryedaddy]

i tried to find an earlier post on sparkplugs so i wouldnt have to bring it back up again but i couldnt find it

[KMcCullah]

For iron heads I like Autolite 124's. They need a stout ignition on the street though...

[fryedaddy]

i have a msd pro billet dist,box and coil.do you use regular,copper,platinum

[Posi67]

Buy some Autolite AR32's and you're good to go. No Platinum or other whizzy plugs required. Champions also not one of my choices except for the lawnmower.

[fryedaddy]

thank you POSI67,thats all i want to know!! i havnt tried those yet,so nows a good a time as any,thanks

[Posi67]

Correction... SORRY! AR33's which are the same as a BF 22 as far as heat range. The AR32's will be too cold for a street engine. Because of your MSD setup the 33's should work well without fouling. Stock ignition likely would be a plug killer. 

[thatdarncat]

I've always run Motorcraft plugs in all my street cars ( various engines ), never had an issue. I used to run Motorcraft plugs in the racecar until Motorcraft discontinued the BF-32's, then I switched to Champion RF9YC's. That's the same heat range as the BF-32. I've been running those about 20 years now, also never had an issue ever. I know some people don't like them, but no problems for me. I run a MSD 6, MSD distributor and MSD coil. The current standard heat range Motorcraft FE plug is the BSF-42C. The "S" is for suppression ( resistor ) and the "C" is for copper core. I agree, skip all the multi electrode plugs, in my opinion they are all just marketing gimmicks. Motorcraft BF 22's are still available from Ford, but would most likely be a special order at most dealers. On the Motorcarft's the lower the number the colder the plug. 

[Ford428CJ]

Here are some plug #'s that I run and have had really good to great luck with. I run a hot ignition and use a .035 gap. Autolite 124's, NGK AP9FS (very cold) , AP8FS, AP7FS. I use the 8's alot. Good luck!