Best plugs for a mild 440 build?

Moparbob · January 02, 2009, 12:16:03 PM

Hey,

What plugs would be best for a mild 440 build, cam, headers, holley, about 9 on the compression with the shaved heads,torquer manifold.

Ghoste · January 02, 2009, 12:22:23 PM

You'll get a variety of answers on this one.

My opinion as one of the apparent last holdouts on Champion plugs would be Champion J10Y.

flyinlow · January 02, 2009, 05:54:36 PM

Champion j 10y if you drive fast. j 11y (factory plug for 440 Magnum) if you put around. Had good luck with NGK ,s on Eddy heads.

Moparbob · January 02, 2009, 05:58:06 PM

What about some of those center fire plugs? We put some of them in an IROC we have, mild build and it cranks.

Just 6T9 CHGR · January 02, 2009, 07:10:04 PM

I have been running the NGK XR5's with great results

firefighter3931 · January 03, 2009, 11:31:25 AM

Quote from: NOT Just 6T9 CHGR on January 02, 2009, 07:10:04 PM
I have been running the NGK XR5's with great results

Bob, run the XR5's and don't sweat it !

Ron

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