New spark plug numbers
 

I went into an Advance Auto Parts today to buy some new spark plugs. I was able to buy off the shelf 4 of the Autolight p/n 3076 at $2.19 each.

I asked if they carried the Champion W18's. No they don't because that number has been replaced by Champion p/n 518.

I also asked about the Motocraft plug TT10. No on this as well because they have been replaced by Motocraft p/n SP488.

They could order these for next day delivery at their store. Pricing was around $7.00 each.

Has any Ford Barner used any of these new part numbered plugs? Any feedback on how good they are?

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I use Autolight 3077 in the 'A' .. I've always liked Autolight sparklers.. They work well in Fords and Chryslers..

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I also just did some Internet Googling on the Interchange Part Numbers for the Motorcraft SP488 and came up with these spark plugs as well :
AC 78S C73 C75 C77 C77L
Champion W10 W14 W18 W20

Autolite 3076 Hex-15/16" Reach-5/8" Thd-7/8-18 Non Resistor
Some other Part Numbers:
Motorcraft 88 SP488 TT8 TT10
Prestolite 78-10 78-8

Looks to be no shortage of vendors with a spark plug for the touring Model As.

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I've been using the Champion W-16Y and they've been performing very well. They look a little like the Champion 3X, but at a fraction of the cost.
Rog

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The order number for the Champion W-18 spark plug has been 518 for years. I've had it listed in my notes for seven or eight years or more.

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I recently swapped Champion W-18s gapped at .035" in for repro 3Xs gapped at .035" which were running a little too cool in my engine (4" bore, 5.9 head, Stipe B cam). Seems to be running smoother particularly on acceleration from low speeds but who knows. Have only put 105 miles on them and have not checked them for heat range suitability yet.

"No they don't because that number has been replaced by Champion p/n 518."

Yer parts guy needs more edumacation on not being a wise ass, the stock number switch to 518 occurred a long time ago but W-18 is still stamped right on the plug. Would he have even been able to find a cross reference if you had brought in a W-18 and asked for 4 more?

Likewise, the Motorcrafts still are stamped TT-10 and Autolites are still stamped 3076.

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I run the W-18 plugs gapped at .035 with a 5.9 head ,Winfield 3/4 race cam and dual updraft B carbs. The heat range is 7 and they run clean.

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Problem is, ifit is not written in a book and the application can be looked up in a book, most counter people won't even be able to cross reference ANYTHING . We have an old time auto parts that I use and the counter guys are mostly old time car guys that I have known for years. They know what a w 16y is and that it will fit a Model A or some tractors. They also have a machine shop in the back that you can hardly walk through BUT, the guy can fix most anything and can save a part most others would toss. This would be the best place to buy your local parts.

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I purchased W-16y for my huskster at my local parts store. They work great.

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the stock number for the champion 3x is 429. The model T X plug is 425.

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This even goes for Ford dealers anymore. Some can't find it even if you give them the FOMOCO box a part came in.

Like James said about his favorite store, our local NAPA store has a couple old timers that can find anything, book or no book.

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There use to be a parts store and machine shop here like James mentions, I wish that we still had it. The old parts men were like real mechanics, they seemed to know what you needed.

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Napa # 429 is new 3 x $20 each . I have not installed them yet, i hope they where worth $$ . I can not get a champion plug to live in any motor only a MOPAR & a LAWN MOWER

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I use champ C16C,s in my "B" engine with 5.9 head,gapped @ .035" and they look & perform like new after more than 13,000 miles.

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Thanks for all the comments on the best plug. Trying to keep the"A" looking original. Will go with the 3x's gapped at .035. Cluck

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LOL Between the last post and this one, those numbers could have changed again and am sure the prices have too! :) Still good information.

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A few years have passed since I started this thread. Some new info out there is that some of the new 3X repos are not as well constructed as the originals. I have had some new 3X ‘s fail with the internal contact breaking internally. The plug looks to be perfect but miss fires...... Often intermittently making you scratch your head on what is happening to your engine to cause the lack of power and a miss. Good idea to carry a spare spark plug on a tour because of this.

Also a lot of us are now running the A’s with higher compression heads that like the spark gap to be reduced down closer to 0.030 for best performance.

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would the 3x's be better to use than the automate 3076 in snide high compression head?

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My NAPA had a great guy probably close to 60 years old. I think they made up an excuse to fire him. Very personable, knew his parts. Actually cared that we all got the right parts for our projects. Kind of a shame. His name was Marty. (central Ohio)

Most of us hardly go there any more unless we have to. It's corporate america's ship...let it sink....