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

[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.