Go Back   Ford Mustang Forums > Mustang > Classic Mustang > Classic Tech

Welcome to our Mustang forums where Mustangers come together to hang out, discuss and enjoy their favorite Mustang hobby with fellow Mustang enthusiasts. We invite everyone to read, post, and enjoy our Mustang forum as well as the many other sections of our site.

You are currently viewing our forums as a guest. By joining our community you gain access to post topics, communicate with members, upload your photos and access many other special features. Registration is fast, simple and free so why wait, join our Mustang community today! If you have any problems with registration or your account login, please contact support.

Classic Mustangs Tech Forum

Technical discussions specific to 1964-1967, 1968-1970, and 1971-1973 Classic Mustang. Discuss all tech related to in-line six cylinder and V8 powered Vintage Mustangs here.

Classic Forums | Classic Talk | Classic Tech | Classic Pictures | Introductions | Mustang Tech | Mustang Lounge 


Reply   Post New Thread
Unread 03-08-2010   #1 (permalink)
digazz is offline Rookie


Joined: May 2009
Posts: 19 Threads: 8
 digazz's Country Flag
Ireland
digazz is on a distinguished road
Default 1968 302 correct spark plug V8

Hi I'm living here in Ireland, and was hoping to change out the spark plugs, The plugs that i removed are a Motorcraft BSF42C plug.
Question is, Is there a replacement for these plugs, as every shop i've gone to never heard of them and don't know there replacement?. My Car is a 68 Fastback, 302 block. Any help would be greatfull. Thanks
digazz is offline  
Digg this Post!Add Post to del.icio.usBookmark Post in TechnoratiTweet this Post!
Reply With Quote
Sponsored Links
Advertisement
 
Unread 03-08-2010   #2 (permalink)
Ivy66GT is offline SHELBY GT 350 Member

Classic Member


Joined: Dec 2008
Posts: 5,478 Threads: 101
 Ivy66GT's Country Flag
Albuquerque   New Mexico
Ivy66GT is on a distinguished road
Default

In ye olden days the plugs would have been Autolite BF42 or Champion UF9Y. In the 70s the Autolite became a 35. In the 80s the Champion was an F9Y. More recently those would be: Motorcraft BF42C, Autolite 45, Bosch D8BC or NGK AP5FS.

Hopefully at least one of those numbers is available in Ireland.
Ivy66GT is offline  
Digg this Post!Add Post to del.icio.usBookmark Post in TechnoratiTweet this Post!
Reply With Quote
Unread 03-08-2010   #3 (permalink)
digazz is offline Rookie


Joined: May 2009
Posts: 19 Threads: 8
 digazz's Country Flag
Ireland
digazz is on a distinguished road
Default

Thanks for the quick response. I found out on a different forum since that i could use APR6fs insted of the APR5fs. Does this sound right. Also will the pl;ug gap need to be adjusted.
digazz is offline  
Digg this Post!Add Post to del.icio.usBookmark Post in TechnoratiTweet this Post!
Reply With Quote
Unread 03-08-2010   #4 (permalink)
Print Dad is offline MACH I Member

Classic Member


Joined: Nov 2008
Posts: 2,643 Threads: 114
 Print Dad's Country Flag  View Print Dad's 4 photos
Medford   Massachusetts
Print Dad is on a distinguished road
Default

Hello digazz,

Asd I was writing Ivy got you covered. Just so you know here is a comparison between Motorcrat and Autolite

Motorcraft Spark Plug, Suppressor.
OEM replacement medium heat range spark plug. Supressor spark plugs include a resistor inside the ceramic coating that reduces engine noise in the radio created by alternators, etc. Plugs feature a tapered seat, 18mm thread diameter, 0.468" reach with a copper core and extended top. Plug gap is 0.035".

Autolite - - #45
Product Type Resistor
Description Copper Core, Extended Electrode
Heat Range Chart Location D21
Hex 13/16"
Reach .460"
Resistor/Non-Resistor/Suppressor Suppressor
Seat Tapered
Thread Diameter 18MM
Tip Power


Good Luck - - P Dad
Print Dad is offline  
Digg this Post!Add Post to del.icio.usBookmark Post in TechnoratiTweet this Post!
Reply With Quote
Unread 03-08-2010   #5 (permalink)
Ivy66GT is offline SHELBY GT 350 Member

Classic Member


Joined: Dec 2008
Posts: 5,478 Threads: 101
 Ivy66GT's Country Flag
Albuquerque   New Mexico
Ivy66GT is on a distinguished road
Default

From what I understand, the Motorcraft is one of the few non-resistor plugs we can still buy in the US. But then, you may not be able to buy them at all in Ireland? The Autolite 45s are definintely resistor plugs.

Autolite has not been a part of Ford since 1973. Bobby Kennedy was on an anti-trust crusade back then (politicking for president?) and made Ford quit making their own spark plugs, etc. It was OK for GM to own Delco, but not Ford to own Autolite??? Ford had to sell Autolite to Bendix, i.e. Fram. That was when Motorcraft came into being. This tells me that likely the Fords were Republicans.

Quote:
Originally Posted by digazz View Post
Thanks for the quick response. I found out on a different forum since that i could use APR6fs insted of the APR5fs. Does this sound right. Also will the pl;ug gap need to be adjusted.
The 'R' is simply a resistor version which makes less RF noise for newer cars with computers. For older cars without electronics the resistor isn't needed but I don't find they hurt anything.

The '6' will be a slightly colder plug than the '5'. Whether a 5 or a 6 is best for you probably depends upon how you drive, etc., and may be a question only you can answer. The gap should be set to the original spec if you still use the original points/condenser. With a higher energy replacement ignition you can open the gap if you like.
Ivy66GT is offline  
Digg this Post!Add Post to del.icio.usBookmark Post in TechnoratiTweet this Post!
Reply With Quote
Sponsored Links
Advertisement
 
Reply   Post New Thread



Thread Tools



Mustang Photos
Mustang Links    Top Sites    RSS    Link To Us    Add to Favorites    Archive    Terms of Use    Site Rules    Privacy    Contact    Sponsors    Advertise   
AllFordMustangs is not affiliated with or endorsed by Ford Motor Company. ©Copyright 2002-2011 All Auto Enthusiasts Network

1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 21 22 23 24 25 26 27 28 29 30 31 32 33 34 35 36 37 38 39 40 41 42 43 44 45 46 47 48 49 50 51 52 53 54 55 56 57 58 59 60 61 62 63 64 65 66 67 68 69 70 71 72 73 74 75 76 77 78 79 80 81 82 83 84 85 86 87 88 89 90 91 92 93 94 95 96 97 98 99 100 101 102 103 104 105 106 107 108 109 110 111 112 113 114 115 116 117 118 119 120 121 122 123 124 125 126 127 128 129 130 131 132 133 134 135 136 137 138 139 140 141 142 143 144 145 146 147 148 149 150 151 152 153 154 155 156 157 158 159 160 161 162 163 164