Author Topic: Motorcraft/Autolite spark plug cross reference  (Read 5549 times)

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Offline MrGuts

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Motorcraft/Autolite spark plug cross reference
« on: February 07, 2010, 10:31:14 am »
Hello,

Given the depth of Ford knowledge here, I figured somebody could easily help me with this one. I have a bunch of older spark pugs that I am trying to get a handle on what I've got here. It has been quite awhile since I have messed with these and my memory has faded regarding the cross reference between the Motorcraft and the Autolites. I have not been able to locate a cross reference chart that covers these applications.

Here's what I am thinking:

Motorcraft                   Autolite
BF42                           34
BF32                           33
BF22                           32
BF12                            ?

I appreciate any confirmation or corrections.

Thanks!

Offline TA28

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Re: Motorcraft/Autolite spark plug cross reference
« Reply #1 on: February 07, 2010, 10:37:19 am »
i think those are FE plugs ? i also think change in heat range 34-33 ect

Offline MrGuts

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Re: Motorcraft/Autolite spark plug cross reference
« Reply #2 on: February 07, 2010, 11:00:44 am »
They could be used in some FE applications. They are also used in small blocks. We used them in a 289 HiPo. You are correct that they are different heat ranges.

Offline TA28

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Re: Motorcraft/Autolite spark plug cross reference
« Reply #3 on: February 07, 2010, 11:06:29 am »
bf32 we ran in the 428scj car. they will not fit a boss motor

Offline Danoh1

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Re: Motorcraft/Autolite spark plug cross reference
« Reply #4 on: February 07, 2010, 11:27:40 am »
correct.  No worky work in Boss 302.  Different threads.  40 lashes for your blasphemy. 
1970 M code Boss T/A (ala Dano)  link to racecar
HHP

Offline 70BossTA

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Re: Motorcraft/Autolite spark plug cross reference
« Reply #5 on: February 07, 2010, 11:53:34 am »
I have an OLD spark plug conversion book, but anything BELOW a 22 heat range is for a race only application, not on a street car for sure...More when I dig up the book.....

Current Boss:  0F02G194983
Previously owned: 
SFM5S271  (65 B/P Shelby)
Bud Moore #16 - Peter Gregg 1971 team - SBY)
0F02G157794 (second owner - Grabber Orange)


Offline 70BossTA

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Re: Motorcraft/Autolite spark plug cross reference
« Reply #7 on: February 08, 2010, 03:00:34 pm »
John/ MrGUTS,
I tried the second one (Autolite) and it works great, and YES they have changed the numbers over the years for Autolite plugs.....NEAT,  I will keep this one for reference!
REF:
BF42 = 45
BF32 = 45
BF22 = AR33
BF12 = AR32

For us BOSS 302 folks:
AF42 = 25
AF32 = 24
AF22 = AR13
AF12 = AR12

Thanks John,
Ed
« Last Edit: February 08, 2010, 06:21:39 pm by 70BossTA »
Current Boss:  0F02G194983
Previously owned: 
SFM5S271  (65 B/P Shelby)
Bud Moore #16 - Peter Gregg 1971 team - SBY)
0F02G157794 (second owner - Grabber Orange)

Offline Wiking John

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Re: Motorcraft/Autolite spark plug cross reference
« Reply #8 on: February 08, 2010, 03:22:42 pm »
NICE

John

Offline MrGuts

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Re: Motorcraft/Autolite spark plug cross reference
« Reply #9 on: February 10, 2010, 04:37:37 pm »
John and Ed,

Thanks to both of you for the input. I appreciate the help.

I also used the first link to help figure out what I needed to know. As Ed correctly notes, Autolite changed their numbering system and this was the root of my problem. I have a bunch of Autolites left from when I was crew for a guy vintage racing many years ago and they are all under the old numbering system. I wanted to figure out what I had and if I would have a use for them some time.

BTW for Ed. I always thought the Mangold car was a neat ride and a great history.

Thanks again.

Offline 70BossTA

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Re: Motorcraft/Autolite spark plug cross reference
« Reply #10 on: February 11, 2010, 03:07:47 pm »
Mr Guts,
Where did you see the Mangold 65 car?  Was it perhaps @ Road America?  I was sorry that the next owner did not feel the same about that Shelby's history and patina. He changed it so much, when I last saw it, I was sick!
Oh, well you can't control what happens after they are gone, RIGHT?  Thanks for the comments and I too thought it was a very neat ride and a whole bunch of great memories racing it!

Ed   
Current Boss:  0F02G194983
Previously owned: 
SFM5S271  (65 B/P Shelby)
Bud Moore #16 - Peter Gregg 1971 team - SBY)
0F02G157794 (second owner - Grabber Orange)

Offline MrGuts

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Re: Motorcraft/Autolite spark plug cross reference
« Reply #11 on: February 12, 2010, 09:15:21 am »
Ed,

Yep, Road America. In the 80's I was pretty active in the Northwoods Region and vintage racing, mostly at RA. During that time I came in contact with John and the Shelby. To me, it really typified a what a GT350 was and the pair had my respect and admiration.

Too bad about the following owners work. I don't believe I have seen the car since it passed from your care or maybe I didn't recognize it if I did. Discussions like this will keep our memories fresh.

EG

Offline 70BossTA

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Re: Motorcraft/Autolite spark plug cross reference
« Reply #12 on: February 12, 2010, 03:06:32 pm »
EG,
WOW that is very nice to hear, John was a GREAT guy and I bought the Shelby in 1988 and it sold 1995.  I tried to keep it as John had raced it, but make it as reliable as possible.  I know he always enjoyed my photos and updates right up until he passed.  I ran it at the Chicago Historics in the early 1990's and loved Road America, that is something John and I totally agreed on!  Next owner raced in SVRA and wreck it at Road Atlanta, when I saw it the next time it had gone full "NASCAR" inside and was repainted.  Like I said, I was sick because to me it was a time capsule and it sure did not stay that way.......IMO a real shame.

Great to hear from you about it and thanks for the memories....

Ed
Current Boss:  0F02G194983
Previously owned: 
SFM5S271  (65 B/P Shelby)
Bud Moore #16 - Peter Gregg 1971 team - SBY)
0F02G157794 (second owner - Grabber Orange)