Sparkplugs.....

[Hot_Rodder]

With all the different spark plugs there are out now, I'm kinda wondering which would be the best (or better) pick for the big block Mopar.... I'm running a modified set of Stealth heads, the Champion #RC12YC is the one recommended to run, but I'm wondering if this is the best choice for my application, or should I look into something else? If I remember right, this plug is a 3/4" projected core plug... Anyway, for simplicity, and that this will be on the street, when driven, I'm probably gonna end up running the Chrome box, Mopar Performance electronic distributor (wanting to get a Billet piece though, I know M.P. makes one too), MSD Street fire wires, and an MSD Blaster 2 coil (or something similar).... The motor has a Holley 850 d.p. with dual plane intake. Cam is the Lunati #60303 and I'll be running 1.6 rockers... Tranny is going to be the 727 TF... Can't think of much else that would be needed that I can honestly answer.

[firefighter3931]

You forgot to list the compression ratio...pretty important info when selecting the correct heat range for the application 

On a build with pump gas compression a 6 series NGK is the correct heat range for that application. 

NGK ZFR6F-11


Ron

[Hot_Rodder]

Guess I forgot how bad the crs has gotten, lol. It will be a pump gas motor, right around 9.5:1 comp

Did a search, I think this is another # for it? #4291

[firefighter3931]

Yep, that's it.....4291 is the "stocking number" that most parts houses will use. 


Ron

[Hot_Rodder]

Thanks again Ron

[firefighter3931]

You're welcome 

If you're looking for a nice distributor consider one of the Firecore billet units along with a matching set of wires. There is a ready to run unit that doesn't require a box as well as a mechanical unit that does need a box (MSD/Mallory/Crane etc...)

Lemme know if i can help 


Ron

[Hot_Rodder]

I remember seeing these Firecore distributors somewhere, but now I can't seem to remember, dang crs....

[firefighter3931]

I remember seeing these Firecore distributors somewhere, but now I can't seem to remember, dang crs....

Don't ya hate it when CRS sets in  What were we talking about...oh ya, distributors 

Here's a link with some pics/specs :

http://board.moparts.org/ubbthreads/showflat.php?Cat=0&Number=5859423&an=0&page=1#Post5859423



Ron