Spark plugs
 

SPARK PLUGS
What kind do you run & why?
How often do you change plugs?

Re: Spark plugs
 

Champion---they produce a tad more HP than the Autolites (dyno proven)- Changing frequency depends on the situation-FED 387

Re: Spark plugs
 

I see MSD is in the spark plug business now,,, anybody try these yet? I'm just thinking of different options in the off season right now for us in the rainy NW.
Danny Durham

Re: Spark plugs
 

I was running Champion, RC12YC, but they're getting hard to find, and the racing version is near impossible to find. Trying some AC Delco plugs soon.

Re: Spark plugs
 

I use AR-13 with great success.
Terry K

Re: Spark plugs
 

I have been using the AC Rapidfires for years. I like them.

Re: Spark plugs
 

Champion N9YC ( 300 New # ) in small Mopars.
I liked Champion N63YC but have not found any
for a couple years!

Anyone have a good Big Block Plug for stocker.
Autolite AR seem to have been changed vendors last
couple years and we have had difficulties since then.

Re: Spark plugs
 

Careful with Ac/delco, it is not the company it once was :rolleyes:
Lots of pirated off shore stuff kicking around. I went to NGK and never looked back.

Kevin

Re: Spark plugs
 

Alot of the AC plugs are now made by ngk .The champion RC12YC is available in probably every parts store that stocks champion .

Joe

Re: Spark plugs
 

The RC12YC is not nearly so commonly available as it once was, and for some reason, many parts stores do not stock Champion, or many Champion part numbers, any more.