What are the preferred spark plugs for the Charger, specifically a 383?

[XS29L9Bxxxxxx]

Advance Auto Parts only stocked AC Delco plucs, which I am not opposed to using. Just wondering if there is something better?  


383 engine, if it matters....  

[Chryco Psycho]

I stay with Champs or Autolites

[XS29L9Bxxxxxx]

I stay with Champs or Autolites

PN or spec? TIA 

[Chryco Psycho]

RJ12YC for Champ , don't have the # handy for the Autolites

[bull]

If you do a search on the site you'll see a fair amount of people talking up the NGK XR5.

[Ghoste]

I think I'm one of the last holdout supporters of Champions.

[firefighter3931]

I wouldn't run a Champion plug in my lawnmower....chinese JUNK ! 

Seen too many reports of plugs being removed with broken/missing electrodes. They used to be a quality part but no longer 

NGK XR5 is the clear choice for factory iron heads and pump gas compression 


Ron

[resq302]

I wouldn't run a Champion plug in my lawnmower....chinese JUNK ! 

Seen too many reports of plugs being removed with broken/missing electrodes. They used to be a quality part but no longer 

NGK XR5 is the clear choice for factory iron heads and pump gas compression 


Ron

Yup, Ron steered me towards the NGK's and I haven't gone back!

[c00nhunterjoe]

I have the autolite factory replacement for the champions in mine. They were 10 cents a plug cheaper then the cahmp's..... 

[red69superbee]

i believe the kgk s clean up better if they get fuel fouled.Always ran a/c 44 or 45s non resistor plugs, too hard to get any more without resistor, ok they others work fine.Never had much luck with autolites or champions

[Fred]

I've been using NGK-BP5ES in my hemi . IMO they're the best.  

[Nacho-RT74]

Is amazing nobody here advices iridium, platinum or whatever other kind of plugs diff than the regular copper electrode.... wondering why

[Fred]

Is amazing nobody here advices iridium, platinum or whatever other kind of plugs diff than the regular copper electrode.... wondering why

Probably because they cost more but don't perform any better. I've notice no difference.

[Ghoste]

I don't buy into that stuff either.  Same with U grooves or multiple electrodes.  I'm not saying they might not be better but I can't justify the extra cost for my needs.

[MoparMotel]

I wouldn't run a Champion plug in my lawnmower....chinese JUNK ! 

Seen too many reports of plugs being removed with broken/missing electrodes. They used to be a quality part but no longer 

NGK XR5 is the clear choice for factory iron heads and pump gas compression 


Ron

My 383 is due for a plug change especially since installing the new Holley Street Avenger so I can see what color they come out- Is XR5 the part number of the plug I need for my 383 or just the type of plug?

[JB400]

I hear the multiple electrodes don't do a thing except keep the plug from fouling out.  I have no idea on the E3 spark plugs.

[firefighter3931]

I wouldn't run a Champion plug in my lawnmower....chinese JUNK ! 

Seen too many reports of plugs being removed with broken/missing electrodes. They used to be a quality part but no longer 

NGK XR5 is the clear choice for factory iron heads and pump gas compression 


Ron

My 383 is due for a plug change especially since installing the new Holley Street Avenger so I can see what color they come out- Is XR5 the part number of the plug I need for my 383 or just the type of plug?

The stock number is 3332...you should be able to go to any auto parts store and ask for an NGK 3332 and they will swll you an XR5 plug. 

Summit also has them :  http://www.summitracing.com/parts/NGK-3332/



Ron

[Nacho-RT74]

Rockauto parts have the XR5s in $1.59

( and I bet shipping in less than $5, BTDT  )

[ACUDANUT]

So Champion's are Chinese ? NGK are Japanese. All the same to me.
Please don't pee in my coke please. No what I meanze.

[1970Moparmann]

I wouldn't run a Champion plug in my lawnmower....chinese JUNK ! 

Seen too many reports of plugs being removed with broken/missing electrodes. They used to be a quality part but no longer 

NGK XR5 is the clear choice for factory iron heads and pump gas compression 


Ron

Great topic.  My 68 runs good at it is, and I have the crappy Champions (3/4" extended reach) in it that 440 Source recommended with the heads. 

I'm changing to the NGK XR5!

[firefighter3931]

I wouldn't run a Champion plug in my lawnmower....chinese JUNK ! 

Seen too many reports of plugs being removed with broken/missing electrodes. They used to be a quality part but no longer 

NGK XR5 is the clear choice for factory iron heads and pump gas compression 


Ron

Great topic.  My 68 runs good at it is, and I have the crappy Champions (3/4" extended reach) in it that 440 Source recommended with the heads. 

I'm changing to the NGK XR5!

Mike, the XR5 is a 13/16 plug that works with the factory Iron heads. 

You need a 5/8 plug for the Stealth's 

I ran the NGK BCPR-6ES plugs in my old 446 with E-Heads and run the same plugs in the new 572 with Indy EZ heads. The 6 series plug is the correct heat range for a street driven/pump gas alum head build. 



Ron

[MoparMotel]

I wouldn't run a Champion plug in my lawnmower....chinese JUNK ! 

Seen too many reports of plugs being removed with broken/missing electrodes. They used to be a quality part but no longer 

NGK XR5 is the clear choice for factory iron heads and pump gas compression 


Ron

Thanks for the part number Ron, Went to my local auto parts store and they didn't have them in stock and checked other stores in town and they didn't have them as well. I'll just order them off Summit.

Thanks!

My 383 is due for a plug change especially since installing the new Holley Street Avenger so I can see what color they come out- Is XR5 the part number of the plug I need for my 383 or just the type of plug?

The stock number is 3332...you should be able to go to any auto parts store and ask for an NGK 3332 and they will swll you an XR5 plug. 

Summit also has them :  http://www.summitracing.com/parts/NGK-3332/



Ron

[Chryco Psycho]

I go the other way , we took a Super Stock Hemi to the dyno looking for even 1 hp gain , literally the more the plug cost the more hp we LOST not gained , The Cheap Champ plugs beat every other plug for power !
In my experience Champs resisted fouling better than NGK once fouled nothing would get an NGK plug to fire again , hit the champs with brake clean dry them off & they would clean right back up .
Each to their own 

[Fred]

I go the other way , we took a Super Stock Hemi to the dyno looking for even 1 hp gain , literally the more the plug cost the more hp we LOST not gained , The Cheap Champ plugs beat every other plug for power !
In my experience Champs resisted fouling better than NGK once fouled nothing would get an NGK plug to fire again , hit the champs with brake clean dry them off & they would clean right back up .
Each to their own  

Hey Chryco, which spark plugs in Champion would you recomend for a hemi 472 compression is 10.7:1   ?
Cast iron block with mopar aluminium heads.

[tan top]

I think I'm one of the last holdout supporters of Champions.

Champions here too ever since i got the charger  !!  tried a couple of sets of NGK in the past   ,

[ACUDANUT]

They have never failed me. But, I did not know they are know made in China...I try my hardest to never support that commie country.

[randy73]

I wouldn't run a Champion plug in my lawnmower....chinese JUNK ! 

Seen too many reports of plugs being removed with broken/missing electrodes. They used to be a quality part but no longer 

NGK XR5 is the clear choice for factory iron heads and pump gas compression 


Ron

I run champions in everything I own and have never had a problem!!

To OP, depends on the heads, if the block is modded, what pistons and a lot of other variables to give you a exact plug to use, as each setup might require a different heat range.

[Brass]

Years ago, I used Champions in my 1st Charger and they fouled pretty regularly.  Switched to NGK's and they still fouled – but a lot less often. 

Fast forward to today.  Different car with ~8,000 miles on the current set of NGK plugs.  No problem so far.

[Paul G]

Is there a difference in plugs used for street driving with ocasional flat peddling, vs. beat the snot out of it constant flat peddling?

[MoparMotel]

I got my NGK #3332 v power plugs in from summit but haven't replaced them yet. Im curious to see if I notice any difference compared to the cheap plugs that are in it now

[lasvegas69charg]

I had 2 champ plugs go bad during my dyno session. I switched to ngk and no problem.

[randy73]

I had 2 champ plugs go bad during my dyno session. I switched to ngk and no problem.

Explain how they went bad???
Did you have to long/short of a plug or what??

Man has this thread gone WAY off topic.

[oldschool]

same problem in aviation. the champions are poor quality. i use to run them in my plane, they are the most fouling plug. i switched to tempest (autolite) and have had no further fouling problems.

you can take a new champion aviation plug right out of the box and check the resistence, and have to throw some  away because of to much resistence.....

[lasvegas69charg]

Randy73 during the dyno session they just quick producing spark. The cylinder wouldnt fire anymore. Took them out and replaced with NGK and no prob.

[Ghoste]

They have never failed me. But, I did not know they are know made in China...I try my hardest to never support that commie country.

Same with me.  I never imagined switching but that day I think has come.