What spark plugs for Edel Heads small block?

Posted By: LAR_414

What spark plugs for Edel Heads small block? - 05/21/09 12:27 PM

What exactly do you guys use?
What part numbers?
What heat ranges?

I've got BKR6E NGK's and they seem a bit too cold to run on the street. I've used a 5 heat range at the track with my iron heads and melted the tips on two cyl.

Posted By: Anonymous

Re: What spark plugs for Edel Heads small block? - 05/21/09 12:49 PM

After fouling problems with NGKs some one suggested I try these: Champion RC12LYC (412)
No more fouling problems. May be a little hot, but no more fouling.Weird looking plug, real long nose. Work perfectly. Been using the same plugs for a couple of years.

Posted By: justinp61

Re: What spark plugs for Edel Heads small block? - 05/21/09 02:11 PM

Autolite 3911.

Posted By: 69Cuda340S

Re: What spark plugs for Edel Heads small block? - 05/21/09 06:20 PM

Edelbrock instructions call for Champion RC-12YC and that crosses over to Autolite 3924 which is what I have been running in mine. Seem to work well. The Autolite 3924 can be bought at Walmart because it fits many cars.

Posted By: Anonymous

Re: What spark plugs for Edel Heads small block? - 05/21/09 06:43 PM

Autolite 3924's or ar 3924's..i wouldn't put champions in my lawn mower..

Posted By: mcat4321

Re: What spark plugs for Edel Heads small block? - 05/21/09 06:55 PM

ngk race plugs box number 4554 or plug number 5671a-8 this is a great street strip plug i went 10.80's on pump gas with just about the same set up as you , using this plug

Posted By: dusturbd340W5

Re: What spark plugs for Edel Heads small block? - 05/21/09 07:07 PM

I am running NGK R5672A-8 stock # 7173 but I do plan on trying some Autolite 3911

Posted By: Joshs68

Re: What spark plugs for Edel Heads small block? - 05/21/09 07:11 PM

Quote:

Autolite 3924's or ar 3924's..i wouldn't put champions in my lawn mower..

I have champions in my lawn mower, leaf blower and weed wacker.
I also have them in my car. they work great in all of them. I have had the same plugs in the lawn equipment for 8 years.

what problems have you had that we should know about?

Posted By: Triple Threat

Re: What spark plugs for Edel Heads small block? - 05/21/09 07:20 PM

I don't recall, I put them in the heads when I put them on 2 years ago, 3-4 thousand miles later and 300 or so passes, they're still in the car.

Posted By: Anonymous

Re: What spark plugs for Edel Heads small block? - 05/21/09 07:21 PM

I used Autolite 3923s

Posted By: 69Cuda340S

Re: What spark plugs for Edel Heads small block? - 05/21/09 08:30 PM

Quote:

Quote:

Autolite 3924's or ar 3924's..i wouldn't put champions in my lawn mower..

I have champions in my lawn mower, leaf blower and weed wacker.
I also have them in my car. they work great in all of them. I have had the same plugs in the lawn equipment for 8 years.

what problems have you had that we should know about?

I used to run Champions in my 340 back in the '80s and they had so much resistance the spark would arc out of the plug boot and to the head. Spent a long time swapping in new plugs, new wires, new everything. As soon as I stopped using Champions and went to Autolites problem went away. I will NEVER use Champion junk again.

Posted By: 1Fast340

Re: What spark plugs for Edel Heads small block? - 05/21/09 08:33 PM

ran accel on the last motor, cant remember the number but it was a straigh crossover for the champions that edelbrock recomended

Posted By: dirt

Re: What spark plugs for Edel Heads small block? - 05/22/09 01:39 AM

i ran champion plugs in my edel heads on my 360 and the electrode came out and screwed up my piston and scared the cylinder wall.
i know detonation will do that but its only a 9.5 -1 compression motor . not a lot of timing either. and all of the other plugs looked fine so it just looks like the plug came apart and trashed my 360.
i will never run a champion again!

Posted By: wheelsup68dart

Re: What spark plugs for Edel Heads small block? - 05/22/09 01:41 AM

Accel 416's for years now. Very good luck with them.

Posted By: Joshs68

Re: What spark plugs for Edel Heads small block? - 05/22/09 01:41 AM

wow, thats not good

Posted By: LAR_414

Re: What spark plugs for Edel Heads small block? - 05/22/09 11:51 AM

Does anyone have a cross reference of Autolite plugs to Champion or NGK?

What heat range are the different Autolite plug to the Champion heat range chart or NGK chart?

Champion: 14 hot 7 cold
NGK: 5 Hot 7 cold
Autolite:????????

Posted By: FlyFish

Re: What spark plugs for Edel Heads small block? - 05/22/09 12:17 PM

I use NGK R5671A-8, stock #4554. For NGK plugs the higher the number at the end, the colder the plug (-7 is hotter than -10). For a street car, I would try a -7 or -8�I have had issues with fouling -8�s when my car was a little rich, but they worked well on the bottle. I used -7's for everyday driving.

Posted By: WadeMetzinger

Re: What spark plugs for Edel Heads small block? - 05/22/09 12:47 PM

I asked the same question a few weeks ago, here is a link to that discussion, I went with AR3911. For one they are what I run in my BB car and Ryan J recommended them to others:

https://board.moparts.org/ubbthreads/show...rue#Post5171990