440 spark plugs??

[sublimegtx]

:confused4: Looking to put a new set of plugs in my car. All I know about the motor is it's a late 60's 440, holley 750, holley street dominator intake, keith black flat top pistons and a pretty decent cam (no specs). It has split fire 8E's in it now and from looking at them they are a light tan color. I was wondering what brand and heat range others may be running? Any I should stay away from? Car seems to run fine, I just want to put new ones in. Thanks.

 

[mopar367]

Stick to champion, mopars always run best with champions

 

[lewtot184]

if your using iron heads the old j11y was the best and was designed for the mopar big block head. unfortunately they've been extinct for many years, unless you can find somebody with a stash.

 

[Stumper]

These days the Champion 12YC is the place to start. If these prove too hot you'll have to drop down to the 9YC plug as I don;t think 11s are made any longer.

 

[sublimegtx]

I always put bosch platinums in my daily drivers. Something like a champ rj12yc or rj14y, for the gtx? Think they are the stock iron heads.

 

[Lowhound]

Iv tried all brands of plugs in my past & present Mopars. Champion is the way to go. All these new fangled split fire,sure fire,may fire plugs will just waste your time & money. Champion 12s.

 

['69Net]

These comments are interesting....Here in Australia...Champion plugs have the reputation of being the worst/cheap and nasty crap plug on the market....

I use NGK plugs in My 440...works for Me..

 

[Al K]

I'm running Accel 437S plugs in the 413;Champions are too long and the plug boots hit the headers. I've got some AC 43S units that I'd like to try,but the length is an issue there as well.

Oh...I do have one set of J11Y's. Never used. Hoping the next set of pipes will allow me to try them...

 

[Dennis H]

NGK's.

 

[copper67440]

I would have sworn by Champions too but have been using NGK's and am pretty happy with them.

 

[Photon440]

These comments are interesting....Here in Australia...Champion plugs have the reputation of being the worst/cheap and nasty crap plug on the market....

I use NGK plugs in My 440...works for Me..

Most of the people I know in the Vancouver area would agree with you.

 

[Sixer]

NGK here

 

[383man]

I ran Autolite AR74 plugs in my old 906 headed 440. They are the racing plug but worked great for me. Ron

 

[Bruzilla]

I helped a friend of mine replace the timing chain on his Superbird's 440, and while we were doing that we decided to do a tune up as well. We went to start the car and got a CNS situation. We knew we had put the chain on right, and had double-checked the timing marks, but the car just wouldn't start no matter what.

We fussed with that engine for two days and were about to tear everything up again and redo the timing chain when "The Old Guy" who is always hanging out around any auto shop came over to us and asked what plugs we had used. When we said Champion, he said they were crap and we should pull them and check em before doing anything else.

We thought he was wrong as they were brand new plugs, but after checking them closely we found five of the eight were bad due to cracked insulators! I could see maybe cracking one or even two during install, which I knew we hadn't, but five? They had to have been bad straight out of the box. We replaced them with Autolite plugs and the engine fired right up. Lesson learned and I haven't gone near Champion plugs since.

 

[Cranky]

These comments are interesting....Here in Australia...Champion plugs have the reputation of being the worst/cheap and nasty crap plug on the market....

I use NGK plugs in My 440...works for Me..

Heard the same thing here too but I've never had any problems with them. Autolite...that's a different story. They burned well but leaked. One time when doing a turnup, I pulled the wires off of them and 3 of the electrodes pulled out with the boots!

I helped a friend of mine replace the timing chain on his Superbird's 440, and while we were doing that we decided to do a tune up as well. We went to start the car and got a CNS situation. We knew we had put the chain on right, and had double-checked the timing marks, but the car just wouldn't start no matter what.

We fussed with that engine for two days and were about to tear everything up again and redo the timing chain when "The Old Guy" who is always hanging out around any auto shop came over to us and asked what plugs we had used. When we said Champion, he said they were crap and we should pull them and check em before doing anything else.

We thought he was wrong as they were brand new plugs, but after checking them closely we found five of the eight were bad due to cracked insulators! I could see maybe cracking one or even two during install, which I knew we hadn't, but five? They had to have been bad straight out of the box. We replaced them with Autolite plugs and the engine fired right up. Lesson learned and I haven't gone near Champion plugs since.

Always give a new plug a good look before installing them. Just because they are new out of the box doesn't mean they got a smooth to where ever you bought them from. One day I was in an auto parts store and an employee dropped a whole box of plugs on the floor and they hit hard. He just gathered them up and sorted them all and put them back on the shelf. And don't forget to check the gap too. I've had more than my fair share of plugs with closed gaps....probably due to being dropped lol.

 

[65 Plymouth Satellite 426]

Autolite!