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Spark Plugs for a 493 big block #1009794 06/09/11 01:52 AM 06/09/11 01:52 AM
Joined: Feb 2007 Posts: 33 Illinois S saukvillage OP member
saukvillage OP member S Joined: Feb 2007 Posts: 33 Illinois	I have a 493 big Block using a drag race P-850 Quick Fuel carb, 10.1 compression. What brand/type spark plugs works best in a 493? I am presently using in my 493 NGK R5670-8. Any recommendation shall be appreciated, Thanks

Re: Spark Plugs for a 493 big block [Re: saukvillage] #1009795 06/09/11 06:54 AM 06/09/11 06:54 AM
Joined: Mar 2007 Posts: 3,285 West Coast, USA jbc426 master
jbc426 master Joined: Mar 2007 Posts: 3,285 West Coast, USA	NGK's are very good. Here's an interesting article to help you figure out the rest... http://www.4secondsflat.com/Spark_plug_reading.html 1970 Plymouth 'Cuda #'s 440-6(block in storage)currently 493" 6 pack, Shaker, 5 speed Passon, 4.10's 1968 Plymouth Barracuda Convertible 408 Magnum EFI with 4 speed automatic overdrive, 3800 stall lock-up converter and 4.30's (closest thing to an automatic 5 speed going)

Re: Spark Plugs for a 493 big block [Re: jbc426] #1009796 06/09/11 07:42 PM 06/09/11 07:42 PM
Joined: Jul 2007 Posts: 11,836 Florida M mopar346 Let me tell ya about fat chicks!
mopar346 Let me tell ya about fat chicks! M Joined: Jul 2007 Posts: 11,836 Florida	Autolite 85s or os it 25s, no it's 85s my memory is slipping. If you are running ignition upgrades such as a MSD up the gap to .060. Careful, your character's showing!

Re: Spark Plugs for a 493 big block [Re: saukvillage] #1009797 06/10/11 12:06 AM 06/10/11 12:06 AM
Joined: Dec 2004 Posts: 10,554 Rittman Ohio fourgearsavoy I Live Here
fourgearsavoy I Live Here Joined: Dec 2004 Posts: 10,554 Rittman Ohio	What heads are you running? I like the Nippondenso Iridium plugs in my Savoy with Indy heads and 11-1 compression Gus 6675203-burnoutpicturegus.JPG (61 downloads) 64 Plymouth Savoy 493 Indy EZ's by Nick at Compu-Flow 5-Speed Richmond faceplate Liberty box Dana 60

Re: Spark Plugs for a 493 big block [Re: fourgearsavoy] #1009798 06/10/11 01:33 AM 06/10/11 01:33 AM
Joined: Feb 2010 Posts: 18,493 Granite Bay CA Kern Dog Striving for excellence
Kern Dog Striving for excellence Joined: Feb 2010 Posts: 18,493 Granite Bay CA	Spark plug reading might be helpful IF they could actually be removed without burning my fingers on the headers.

Re: Spark Plugs for a 493 big block [Re: fourgearsavoy] #1009799 06/10/11 02:35 PM 06/10/11 02:35 PM
Joined: Feb 2007 Posts: 33 Illinois S saukvillage OP member
saukvillage OP member S Joined: Feb 2007 Posts: 33 Illinois	I'm using 906 heads with 2.14" intake valves installed and mildly ported.

Re: Spark Plugs for a 493 big block [Re: saukvillage] #1009800 06/10/11 02:45 PM 06/10/11 02:45 PM
Joined: Jan 2007 Posts: 780 Woodinville, WA Viol8r super stock
Viol8r super stock Joined: Jan 2007 Posts: 780 Woodinville, WA	Those 8's seem a bit cold for you what you have there. With a 10:1 iron headed motor I would think NKG "6" heat range for street driving and "7" if you are racing.

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