Champion spark plugs N10Y4

[Fran Blacker]

Have had these N10Y4 plugs awhile does anyone know what the 4 means?
Anyone have an easy way to remove the crush gasket on them.

Thanks.

 

[RJRENTON]

Have had these N10Y4 plugs awhile does anyone know what the 4 means?
Anyone have an easy way to remove the crush gasket on them.

Thanks.

In Champion Spark speak, the -4 = A wide gap. The Y = Projected nose electrode. The N = the reach or in this case its 3/4" and the numeral 10 is the heat range running from 6 (cold) thru and including 14 (hot). The standard plug for the Hemi was N-10Y and the origional LA small block was N-14-Y, the origional 340 small block was N-9Y. The origional Max Wedge Stage III was J-9Y with the 13.5:1 compression ratio.
Just thought you might like to know.....
BOB RENTON

 

[Fran Blacker]

Knew the other things but the 4 didn't know. Looked online I didn't find any thing, thanks.

 

[oldbee]

C'mon Fran, listen to Bob. " J's " are the big block plugs! You're getting "something" in your old age,lol. Now, I'm trying to remember the letter for cut-back side electrode on the J's; d___ it. Jeff

 

[Fran Blacker]

Just was asking what the 4 meant in N10Y 4. Couldn't see any obvious difference but notice gaps needed to be knock down. Probably run them a while and buy something else.

 

[RJRENTON]

C'mon Fran, listen to Bob. " J's " are the big block plugs! You're getting "something" in your old age,lol. Now, I'm trying to remember the letter for cut-back side electrode on the J's; d___ it. Jeff

OB,
champion, when it was an independent entity, not part of any conglomerate, made more spark plugs than NGK or any US maker. In my library of Champion listings, your question about the J gap plugs (not thread reach), pertained to the ground electrode configuration, where the ground electrode came half way across the center electrode. This was developed for 2 cycle engines. However it exrendes to other applications where the ground electrode came to the side of the center electrode...side gapped.
There were literally 1000's of different listings, many specialized, many common place, many reaches, heat ranges, electrode alloys and gap configurations.
BOB RENTON