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spark plugs

January 12 2018 at 9:49 AM
CW  (Login cobracat)
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I just pulled the plugs from my 428 CJ and they are Autolite powertip 35, the engine runs great with these, but wondered if anyone knows what they were originally for, seems like 45 are the sub. for BF 32.
I am going to replace plugs and would like to know what to use. The car is not driven often or far at one time, but I do get on it once in a while.

 
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jim
(Login jimj428galaxie500)
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plugs

January 12 2018, 1:19 PM 

the factory plugs was bf-42

 
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Bill
(Login mustang520)
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spark plugs

January 12 2018, 2:54 PM 

My 68.5 428 CJ 4 speed 4.30 drag pak Mustang had bf-32 from the factory

 
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DaleP
(Login Posi-67)
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Performance cars got 32's and most of the rest got 42's

January 12 2018, 4:24 PM 

The Autolite 45 is the sub for a no longer available 42. The 32 is a colder plug but to confuse matters more the AR33 (racing) plug is the same as a BF22. I don't know if there is an Autolite match for the 32 and couldn't find any listing for a Powertip 35 so we haven't answered your question so far.


    
This message has been edited by Posi-67 on Jan 12, 2018 7:00 PM


 
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FElony
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AR-33 appear to be

January 12 2018, 4:58 PM 

the closest match to the BF-32, which as mentioned was the stock CJ plug. From what I've read, modern, more efficient ignitions and different pump gas formulations have skewed heat range choices from the original production items, so I would suggest testing different plugs for compatibility with your own setup.
====

 
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DaleP
(Login Posi-67)
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I corrected my above post but the AR33 is still like a

January 12 2018, 7:06 PM 

BF22 as far as heat range. The AR32 is the same as a BF12 which is too cold even for my junk. Told you I was confused... The regular 35 didn't show up on Autolites webpage when I did a search but I'm sure Ed has it correct.


 
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Bill Ballinger
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My 394 likes the AR33s, it idles at 1000 for the solid cam

January 15 2018, 5:56 PM 

but they are all nice and clean and not white like the BF42s used to be. The 4.33s might have hurt the Spartan locker, it still does 2 leg burnouts, but has a bad vibration at 5000 in high. We are likely going to put 3.25s back in after hibernation, Maybe another Spartan in the 3.25s, but I think the 4.33s need to have a better locker and axles. It might just be the driveline I don't know. We didn't notice it until the last drive before putting it up.

 
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Ed Jenkins
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35= replacement for 42.........

January 12 2018, 5:51 PM 

........replaced by 45
Ed Jenkins

Ford Galaxie Club of America member #3350
1966 Galaxie 500 Convertible built in Chicago Illinois, will have a 400 horse 390, trick C6, Crites Aluminum radiator and a rust free frame from the south. Work continues.

 
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Bill Ballinger
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The BF32 is the Auto lite 35, they cross reference but the 35

January 14 2018, 3:48 PM 

is colder than the 45 and the BF42, it is halfway between a BF32 and BF-22

 
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Bill Ballinger
(Login 65billgal)
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Bf32 s the same as the are the Autolite 35 is the same as t

January 14 2018, 12:33 PM 

Okay I'll try to say this again the otter like 35 is the same as the BF 32 slightly colder almost the 22 I am running those in mine. The the Autolite 32 I mean excuse me 35 is a good all-around cold plug for an engine that has some compression. The I what I'm trying to say is that the Autolite 35 is the same as the BF 32 and almost as cold as the bf22 . Autolite 45 is the replacement for the bf42


    
This message has been edited by 65billgal on Jan 14, 2018 12:48 PM


 
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Ed Jenkins
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Autolite 35's are a replacement for Autolite BF42..........

January 12 2018, 5:50 PM 

........In the late 70's 77,78 or so Allied Autolite renumbered their spark plugs.
non resistor 42 became 35 and 32 became 33.

Ed Jenkins

Ford Galaxie Club of America member #3350
1966 Galaxie 500 Convertible built in Chicago Illinois, will have a 400 horse 390, trick C6, Crites Aluminum radiator and a rust free frame from the south. Work continues.

 
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CW
(Login cobracat)
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Autolite 35's are a replacement for Autolite BF42..........

January 13 2018, 10:06 AM 

Thank you guys, Ed answered the question and so I will go with the45's because these plugs are a b--ch to change with all the smog tubes and such, again great to have this forum, slow as it is!

 
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