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Re: Are Champion RJ12YC's junk ?
[Re: mopowergtx]
#71828
06/12/08 09:23 AM
06/12/08 09:23 AM
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Joined: Jan 2003
Posts: 74,965
U.S.S.A.
JohnRR
I Win
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I Win
Joined: Jan 2003
Posts: 74,965
U.S.S.A.
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Yep Champions are junk, thats why they were the OE plug when these cars were new.  I think your problem is running a resistor plug in that motor in the first place. Find a non-resistor plug in the heat range you want and try that. I run old NOS J11Y Champions and have never had a problem. But you pick any manufacture you want and find out for yourself which one you like because anytime somebody asks about spark plugs on here you get a different answer. Its about like asking which beer is the best. 
the champions that were installed in the 60's/70's are a much better plug than the new champions , never had good luck running that rj12 in anything either .
Probably right John, but I still got 4 sets of the vintage NOS J11Y's left. 
But I still have never seen anybody have any real luck running a resistor plug on a beefed up mill running alot squeeze and a hot ignition. Seems like whatever brand they run the stupid resistors burn out of them with quick. 
i have a few NOS sets of 11's and 10's .
maybe its the resistor but i never had luck wit hthem on stock performance big blocks . my dart had a set of them on it when i got it , it was the first thing i swapped out .
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Re: Are Champion RJ12YC's junk ?
[Re: mopowergtx]
#71829
06/12/08 09:41 AM
06/12/08 09:41 AM
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Joined: Apr 2007
Posts: 1,261
ILL
mark7171
pro stock
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pro stock
Joined: Apr 2007
Posts: 1,261
ILL
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what about suppressor plugs?
Last edited by mark7171; 06/12/08 10:10 AM.
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Re: Are Champion RJ12YC's junk ?
[Re: Mr.Yuck]
#71832
06/12/08 11:01 AM
06/12/08 11:01 AM
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Joined: Jan 2003
Posts: 13,572
md
mopars4ever
I Live Here
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I Live Here
Joined: Jan 2003
Posts: 13,572
md
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I swapped from Champs to Autolites a few years back. I really didn't notice much of a difference except that the Auto's seem to get rustier quicker. People swear by them.
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Re: Are Champion RJ12YC's junk ?
[Re: mopars4ever]
#71833
06/12/08 11:21 AM
06/12/08 11:21 AM
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Joined: Jan 2003
Posts: 5,890
Athens, Greece
Pyper70
master
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master
Joined: Jan 2003
Posts: 5,890
Athens, Greece
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I ran Splitfires on my slant and she loved it, Ran Bosch Plat's on the 70 R/T 440 and she stumbled, took her back to Champions and she ran like a champ....I currently have Champions in the 69 R/T now and have 12YC spares. They seem work just right with my combo....with the 509, eddy, dual quads and a hotter cam I am going with NGK
Family owned 1969 Charger R/T DualQuad 440/727/GVO/3.55s
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Re: Are Champion RJ12YC's junk ?
[Re: W5Duster436]
#71837
06/12/08 07:34 PM
06/12/08 07:34 PM
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Joined: Mar 2005
Posts: 3,445
N.Wilkesboro,NC
DusterKrazy
master
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master
Joined: Mar 2005
Posts: 3,445
N.Wilkesboro,NC
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What would be the best plug to run in a 340 with 11.5:1 and solid lift w/mallory hyfire VI-AL ignition?
Just getting ready to fire it up and want to make sure I get the best plug. Also isn't the gap supposed to be .040-.045 with the hot ignition modules?
Yes! Always run a larger gap with the ignition box systems. I do on my drag car and it works great. Hard to reccomend a specific plug though because ask 5 different people and get 5 different answers...
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Re: Are Champion RJ12YC's junk ?
[Re: MadMatt]
#71838
06/12/08 08:31 PM
06/12/08 08:31 PM
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Joined: Oct 2004
Posts: 8,165
Left Coast
BobR
master
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master
Joined: Oct 2004
Posts: 8,165
Left Coast
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I switched from Champion N9YC to NGK BP6ES on my fairly stout 360 and there was a substantial improvement. I'm also running an MSD 6AL and IIRC MSD specifically recommends AGAINST running platinum plugs. I'm not sure if that is true with any other aftermarket ignition systems.
Good advice. Don't use platinums with MSD. The 12 heat range plug is too hot for 12.5-1 compression. You need the 9 series equivalent or cooler. I also like NGK or Autolite racing with the strap cut back. If you foul a 9 series plug you have some tuning issues. I recommend an Autolite AR23. -Bob
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Re: Are Champion RJ12YC's junk ?
[Re: OLD318]
#71839
06/12/08 10:54 PM
06/12/08 10:54 PM
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Joined: Jul 2005
Posts: 371
Pennsylvania
craigerlitz
enthusiast
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enthusiast
Joined: Jul 2005
Posts: 371
Pennsylvania
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Quote:
I would'nt give you a nickel for a new
champion plug..
Use AutoLite.... or AC Delco...
Funny, I wouldn't give you a penny for a set of autolites. Never had any luck with them in a 2.5L, 3.9L, 318, 360, or 440. I'll stick with the Champions.
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Re: Are Champion RJ12YC's junk ?
[Re: craigerlitz]
#71840
06/12/08 10:58 PM
06/12/08 10:58 PM
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Anonymous
Unregistered
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Anonymous
Unregistered
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i wonder which has more ZDDP (zinc) content.. champions or autolites? 
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Re: Are Champion RJ12YC's junk ?
#71841
06/12/08 11:20 PM
06/12/08 11:20 PM
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Joined: Oct 2004
Posts: 8,165
Left Coast
BobR
master
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master
Joined: Oct 2004
Posts: 8,165
Left Coast
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Quote:
i wonder which has more ZDDP (zinc) content.. champions or autolites?
I don't know but I do know that every racer I'm involved with either uses Autolite racing plugs or NGK's. -Bob
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Re: Are Champion RJ12YC's junk ?
[Re: BobR]
#71842
06/12/08 11:28 PM
06/12/08 11:28 PM
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Anonymous
Unregistered
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Anonymous
Unregistered
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personal preference i guess. if one finds a plug that works well, no reason not to use it.
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Re: Are Champion RJ12YC's junk ?
#71844
06/13/08 10:35 AM
06/13/08 10:35 AM
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Joined: Jun 2006
Posts: 3,075
Eastern Ohio
mopowergtx
master
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master
Joined: Jun 2006
Posts: 3,075
Eastern Ohio
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Quote:
i wonder which has more ZDDP (zinc) content.. champions or autolites?
And everybody knows Budweiser in the bottle is the best beer out there.
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Re: Are Champion RJ12YC's junk ?
[Re: jcastle1]
#71845
06/13/08 10:57 AM
06/13/08 10:57 AM
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Joined: Oct 2004
Posts: 8,165
Left Coast
BobR
master
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master
Joined: Oct 2004
Posts: 8,165
Left Coast
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Quote:
Thanks Bob,Do I have to cut the strap back?
The AR23 plugs come this way OOTB. -Bob
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And the new ones quality compared to the old(60's-70's) is unknow personally by me from experience.
