Spark plugs

[Confusedcuda]

What plugs would you run in a 71 340 streeter, that are reasonable?

 

[Bulldozer]

NGK is all i run

 

[Demon 408]

X2 on NGK.

What's reasonable? A set of 8 NGK plugs is $8.00 more than a set of Autolite plugs.

 

[70aarcuda]

champion n9yc...what the factory put in it...

 

[Hemiroid]

Champion for over 40+years.

Now let the fun begin! :happy1:

Kenny

 

[Johnny Dart]

NGK'S or Autolites for me.

 

[Divenut]

Autolites here.

 

[mullinax95]

I use Autolite.

 

[340_dart_power]

I thought about buying Pulstars until I saw this:

http://www.carbibles.com/productreviews_pulstar.html

And this:

http://www.sparkplugs.com/sparkplug411.asp?kw=SRT-4+Dyno+Results&mfid=0

 

[grimreaper]

I've tried a quite a few different options but find the old tried and true Autolites to perform as good as any. Plain old Autolite 65s in my cars right now. I used to use only Champion but they don't seem to be the same quality they once were.

 

[dennday67]

Ngk

 

[dano]

The engine builder I consult said plain old Autolites. On the dyno a set of Splitfire plugs lost 50hp to a set of plain Autolites. I've ran NGK, Autolites, and Champion and never had an issue with any. Everytime the part store guy argues my brand selection and give siting to a "buddy", my responce is this "If you are having issues with the spark plug then you either have the wrong plug and/or an issue in the ignition system or fuel or both."

Run what brand you feel good with.

 

[momoparman]

Plugs?

Two potato's in the tailpipes should plug it up real good.

 

[Confusedcuda]

No $8.00 plugs Momoparman

 

[bad440]

autolite 63s in mine runs great.did the splitfire test years ago on an 11to 1 440 and the autolites were 2 tenths better

 

[RustyRatRod]

champion n9yc...what the factory put in it...

This ^^^^^^

 

[momoparman]

OK then....I use Champion in my car.
$1.99/plug so yes I am blowing your $8.00 budget.

Mop

 

[toolmanmike]

I think your street 340 would be happier with n12y's (r n12yc). The 9's are pretty cold. I tried this a few months ago with my hp273. The factory plug is a n9y. I switched to 63 Autolites which is a n8y on some charts. The motor always ran rough and switched to n12y's and immediately the motor ran smoother and cleaner. Here's a thread: http://www.forabodiesonly.com/mopar/showthread.php?t=186166
tmm

 

[momoparman]

Did the potato trick work out for you?

Mop

 

[momoparman]

In response to the comment about running a hotter/colder plug here is some helpful info......

Some cars with high-performance engines naturally generate more heat, so they need colder plugs. If the spark plug gets too hot, it could ignite the fuel before the spark fires; so it is important to stick with the right type of plug for your car.

$0.02

 

[JohnnyRingo]

Just out of curiosity, what's all the excitement about these E3 diamond fire spark plugs? I keep hearing about them and see ads for them on various shows, but never once heard of them until this year.

 

[tekslk]

Ive run E3s on a couple diffrent vehicles they work great on carb models not as good on fuel inj.