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Best spark plugs for 10:1 iron head 383 #369285 07/07/09 04:51 PM 07/07/09 04:51 PM
Joined: May 2003 Posts: 561 Oakland, CA 68Bullet OP mopar
68Bullet OP mopar Joined: May 2003 Posts: 561 Oakland, CA	Hey guys, as the title says I'm looking for the best plugs for my 383. I keep breaking the ceramic and bending the electrodes on the cheapy auto parts store generic brand plugs. AC Delco totally failed, and now I'm using autolite with not much luck. What do you guys reccomend?

Re: Best spark plugs for 10:1 iron head 383 [Re: 68Bullet] #369286 07/07/09 05:23 PM 07/07/09 05:23 PM
Joined: Feb 2003 Posts: 1,095 Bloomington, Illernoise cptn60 super stock
cptn60 super stock Joined: Feb 2003 Posts: 1,095 Bloomington, Illernoise	You are gonna get different replies as some have good luck with Champion, some Autolite, some NGK, Bosch, and on and on. I would put some j10y's in it and try it. Good luck This space available for rent

Re: Best spark plugs for 10:1 iron head 383 [Re: cptn60] #369287 07/07/09 05:41 PM 07/07/09 05:41 PM
Joined: Jan 2004 Posts: 27,347 Today? Who Knows? 1_WILD_RT Management Trainee
1_WILD_RT Management Trainee Joined: Jan 2004 Posts: 27,347 Today? Who Knows?	Lots of choices out there... Some really good, some not so good... I like NGK's & ND's... But my question would have to be how did you get 10-1 C/R in an iron headed 383...

Re: Best spark plugs for 10:1 iron head 383 [Re: 68Bullet] #369288 07/07/09 06:01 PM 07/07/09 06:01 PM
Joined: Mar 2008 Posts: 5,746 Ontario, Canada Dodgem master
Dodgem master Joined: Mar 2008 Posts: 5,746 Ontario, Canada	RJ12YC

Re: Best spark plugs for 10:1 iron head 383 [Re: 1_WILD_RT] #369289 07/07/09 06:03 PM 07/07/09 06:03 PM
Joined: Oct 2003 Posts: 21,345 Marysville, O-H-I-O 70Cuda383 Too Many Posts
70Cuda383 Too Many Posts Joined: Oct 2003 Posts: 21,345 Marysville, O-H-I-O	Quote: Lots of choices out there... Some really good, some not so good... I like NGK's & ND's... But my question would have to be how did you get 10-1 C/R in an iron headed 383... I had 9.5 on my 383 with open chamber iron heads with the pistons at....wait...nevermind, my extra stroke makes it a 440 Photobucket sucks

Re: Best spark plugs for 10:1 iron head 383 [Re: 70Cuda383] #369290 07/07/09 06:27 PM 07/07/09 06:27 PM
Joined: Jan 2003 Posts: 884 Vacaville/ El Dorado Hills ,Ca 440FISH super gas
440FISH super gas Joined: Jan 2003 Posts: 884 Vacaville/ El Dorado Hills ,Ca	KB pistons with decked 452's and a steel head gasket is how to get 10:1 in a 383...

Re: Best spark plugs for 10:1 iron head 383 [Re: 1_WILD_RT] #369291 07/07/09 07:24 PM 07/07/09 07:24 PM
Joined: May 2003 Posts: 561 Oakland, CA 68Bullet OP mopar
68Bullet OP mopar Joined: May 2003 Posts: 561 Oakland, CA	I had the heads shaved about .035 to achive the compression bump. I would NOT recommend it due to the intake fitment issues I've had to struggle with. BUT I don't want to deal with these plugs anymore. Are there any brands I can buy at Napa or a good auto parts store that are off the shelf and would be OK? Heat range suggestions? "Broke is temporary, cheap lasts forever"

Re: Best spark plugs for 10:1 iron head 383 [Re: 68Bullet] #369292 07/07/09 07:52 PM 07/07/09 07:52 PM
Joined: May 2005 Posts: 2,295 dark side of the moon D Dougsmopars top fuel
Dougsmopars top fuel D Joined: May 2005 Posts: 2,295 dark side of the moon	Autolite number 85. Short stem. Great plug in BB mopars

Re: Best spark plugs for 10:1 iron head 383 [Re: Dougsmopars] #369293 07/07/09 08:18 PM 07/07/09 08:18 PM
Joined: Oct 2004 Posts: 798 Nebraska FASTBACK66 mopar addict
FASTBACK66 mopar addict Joined: Oct 2004 Posts: 798 Nebraska	Quote: Autolite number 85. Short stem. Great plug in BB mopars That's all I use. But I also run all MSD too. Vinny

Re: Best spark plugs for 10:1 iron head 383 [Re: FASTBACK66] #369294 07/07/09 08:23 PM 07/07/09 08:23 PM
Joined: May 2005 Posts: 2,295 dark side of the moon D Dougsmopars top fuel
Dougsmopars top fuel D Joined: May 2005 Posts: 2,295 dark side of the moon	I use the MP electronic with orange box. Fire's every time never left me stranded. Get plenty of miles out of a set of plugs.

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