BF 32 Autolite

[SCOTTGTK]

Good evening, anyone running a set of original Autolite BF 32's in their K code?
Thanks, Scott

[trotrof1]

That's what I use in my 66 350. No issues, Nice uniform light tan color.

[s2ms]

Same, no issues.

[GT350Lad]

Yeah 2 GT350s with them in, no worries

[greekz]

I am running them as well in both GT-350's.  No issues over the last 35 plus years.

[SCOTTGTK]

Thank you all for the responses... can I ask where you've been able to find them? I have seen a set or 2 on Ebay here and there?   Scott

[SCOTTGTK]

Also, does anyone here run Pertronix as well? I was wondering if that's an issue running BF32 plugs with Pertronix. Last question, I do see a few sets for sale on Ebay as I mentioned and a wide range of prices... what's a fair price for 8 or 10 plugs?  I see $1400 to $135?
Thank you all, Scott

[Bob Gaines]

Also, does anyone here run Pertronix as well? I was wondering if that's an issue running BF32 plugs with Pertronix. Last question, I do see a few sets for sale on Ebay as I mentioned and a wide range of prices... what's a fair price for 8 or 10 plugs?  I see $1400 to $135?
Thank you all, Scott

The high prices are typically for the BF32 star marked plugs.  Autolite marked BF32 are about 10.00 or more each .The BF32 Motorcraft marked plugs are less but I don't keep track of those.

[trotrof1]

I am using the Pertronix with 32s and OEM coil. Works OK in my cars.

[SCOTTGTK]

Thanks Bob, trotrof1, any thoughts on differences between Autolite and Motorcraft?
Bob, I've seen star marked plugs, any difference in performance or were they star marked due to being older or newer?

[A-Snake]

BF42 might be a good option. A little hotter plug.

[Bob Gaines]

Thanks Bob, trotrof1, any thoughts on differences between Autolite and Motorcraft?
Bob, I've seen star marked plugs, any difference in performance or were they star marked due to being older or newer?

All BF32 are the same heat range just different in appearance. If you start to foul plugs or the tips don't look lean enough when you inspect them you can go to the next step up to BF42 as A-Snake/Jim suggested. A lot of us have done that over the years when we street drove the cars more.

[TA Coupe]

I have a bunch of autolite BF 22 spark plugs. Does anyone use those anymore? Any particular engine use them?

      Roy

[s2ms]

I have a bunch of autolite BF 22 spark plugs. Does anyone use those anymore? Any particular engine use them?

Roy

BF22's were heat range #3 IIRC, one range colder than BF32. Pretty much a racing only plug, don't believe it came factory in any production car.

[s2ms]

Another option if you want to use BF32's is the Autolite #34 plug. After Ford and Autolite separated in 1972, all Autolite plugs got the Motorcraft name, Autolite continued making plugs with a new numbering system. The BF32 was now Motorcraft while the Autolite version was #34, same exact plug. You can find Autolite 34's cheaper than BF32's, here's a set on ebay now:

https://www.ebay.com/itm/127812391980