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View Full Version : spark plugs for a h/m 351w



mattyboy
06-10-2005, 10:54 AM
what are you guys running in your fords??
need a brand and a part number
351w 4 barrel 10:1 compression

Thanks as always

MOP
06-10-2005, 12:23 PM
Matty I bought a set of Autolite Platnum AP25's For my Ford in the 16, they were recommended by my shop guys never used them. If they are among the recomended ones that the guys come up they are NIB give me $10 + Ship. Oh Suchca Deal!

Phil

turbo2256
06-10-2005, 12:40 PM
Should be Motorcraft BF32C's.

Morgan's Cloud
06-10-2005, 02:13 PM
Did'nt the 351 have two different heads .. one had a small thread the other large (for the sp plugs) ?

I used to use (when I could get them) the motorcraft mr44t (or 43 depending on your temp range)

Also used the NGK equivalent (can't remember the number) with very good results .

turbo2256
06-10-2005, 02:28 PM
Not positive but the old 69 and 70 351 heads were the big plugs, big ports and big valves. The newer heads were just 302 heads with the bolt holes drilled for 1/2" head bolts. Marine stuff is a bit different. Such as I have a set of marine 302 heads. The casting marks say 351W but are drilled for 7/16 head bolts. Not shure what year the engine is or plug size. I will dig them out and look. They do have the older big ports and valves. o big deal the small plugs with 10 to 1 would be AF 32C's. Dont know of any 10 to 1 engines with the big plugs though.

mattyboy
06-10-2005, 03:09 PM
this is a 69 and they are the big plugs, been there done that all the local guys have champion and don't get any others I wanted to try ngk so I figured I would order online from summit, have a gizzilion choices , spoke to sales desk nice guy he started talking enginese,heat range,ipsofacto,:confused:yadada yada compresion yadadyada 2 bbl or 4 bbl
they take different plugs
I said spark plugs comprende he laughed , he said what's in it now I said spark plugs :tongue: he said does it run good I said I thought so but after talking to him I'm not so sure anymore, so I have to get him the part number off the champions in it'I bet he recorded the call and all those parts guys are listening to it over the pa laughing their asses off

Moody Blu'
06-10-2005, 08:34 PM
I believe the autolites ARE motorcraft.

i ran the ngk's V power and truthfully they didnt do much.
I just run the motorcraft/autolite now gapped to .035 i think?

mattyboy
06-10-2005, 08:52 PM
moody got a part number and what size are they

mattyboy
06-10-2005, 09:46 PM
great impersonation Poodle you sound just like the guy on the phone today :)

that's what i was looking for
thanks

MOP
06-10-2005, 10:35 PM
Matty loves when you talk that way!

mattyboy
06-11-2005, 06:11 AM
yup sure do, i don't speak the language
I am too stoopid to learn it but smart enuff to know not to try and fake it

;)

Mateo
Master of turn key and go

MOP
06-11-2005, 06:47 AM
Matty I went out to my shop and got out the manual, the plugs shown for the HO 351 is RV15YC-4 or Motorcraft ARF-32M set to .035 gap. These are the small thread type but can be cross referenced to the equivalent plugs for yours.

Phil

mattyboy
06-11-2005, 07:02 AM
thanks guys I call summit today

mattyboy
06-11-2005, 08:33 AM
ok pulled a plug this am
so who has or where do you find a cross refernce


champion RF10C 13/16

Moody Blu'
06-11-2005, 10:51 AM
damn i was on the money for the gap! :biggrin.:

MOP
06-11-2005, 01:19 PM
ok pulled a plug this am
so who has or where do you find a cross refernce


champion RF10C 13/16

Mr. Poodle gave you one that works or go to your local auto parts and have them cross the numbers I gave you out of the manual. Just make sure they are for a marine app and is the one uses a 13/16" socket not 5/8".

Phil

mattyboy
06-11-2005, 01:47 PM
Mr. Poodle gave you one that works or go to your local auto parts and have them cross the numbers I gave you out of the manual. Just make sure they are for a marine app and is the one uses a 13/16" socket not 5/8".

Phil
been there done that those are the wrong plugs when you cross reference them you still get the smaller plug

yes MP did but for ngk which is what i am looking for but my thought was it would be nice to have the compatible plugs for all the brands i have been documenting all the part numbers on the 16 for replacement equipment
so how do I get all the brands cross referenced
I guess my second question was where did MP find that info it is not that i didn't hear him the first time

fram/autolite/motorcraft
ngk which we have now
accel
ac/delco
whoever else's plug