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Hemi spark plugs #1794352 04/01/15 06:16 PM 04/01/15 06:16 PM
Joined: Sep 2006 Posts: 1,131 Home of the Bluegrass MoparJunkie OP super stock
MoparJunkie OP super stock Joined: Sep 2006 Posts: 1,131 Home of the Bluegrass	Hey guys, finally getting ready to fire the hemi up and I want to know if NGK BP7ES plugs will be okay? 472 with eddy aluminum heads, 10.5 cr, with 587/564 hydraulic cam... They're 13/16 hex plugs just want to make sure the reach is correct????? TIA "It takes a Mopar to catch a Mopar” 1971 Roadrunner FJ6 Sassy Grass 505"RB, 18 spline 4 speed, and Dana 60 with 3.54 2022 Hellcat Charger Widebody Redeye Jailbreak: Hellraisin with 8 speed auto

Re: Hemi spark plugs [Re: MoparJunkie] #1794353 04/01/15 06:35 PM 04/01/15 06:35 PM
Joined: Jan 2007 Posts: 10,136 A Red State SNK-EYZ I Live Here
SNK-EYZ I Live Here Joined: Jan 2007 Posts: 10,136 A Red State	I can't say as far as the heat range, but if it's the long reach (long threaded area) like this one pictured it should be correct. Kayse can't keep up at all now. lol

Re: Hemi spark plugs [Re: MoparJunkie] #1794354 04/01/15 06:39 PM 04/01/15 06:39 PM
Joined: Aug 2003 Posts: 43,195 Bend,OR USA C Cab_Burge I Win
Cab_Burge I Win C Joined: Aug 2003 Posts: 43,195 Bend,OR USA	What does Eddy say about he correct spark plug length? Follow thier directions If they say to use a standard 426 Gen 2 spark plug type your golden with that plug as long as it is 3/4 reach I like and use the smaller 5/8 hex spark plugs now instead of the larger 13/16 OEM sizes Mr.Cab Racing and winning with Mopars since 1964. (Old F--t, Huh)

Re: Hemi spark plugs [Re: MoparJunkie] #1794355 04/01/15 06:51 PM 04/01/15 06:51 PM
Joined: Jul 2006 Posts: 4,179 California mickm master
mickm master Joined: Jul 2006 Posts: 4,179 California	NGK BP6ES is what i've always used, and heard recommended by a number of hemi people. of course, that is a starting point. i've never tried other heat ranges. plugs look good, so no need, but

Re: Hemi spark plugs [Re: MoparJunkie] #1794356 04/01/15 10:44 PM 04/01/15 10:44 PM
Joined: May 2003 Posts: 854 Bloomingdale , OH super451b super stock
super451b super stock Joined: May 2003 Posts: 854 Bloomingdale , OH	If your chambers have been worked/cnc'd , you may want to find a way to see exactly how long of a reach plug that you need. I have a set of BB RPM heads in the shop now that have had the chambers cnc'd and because of the material that was removed , the threads for standard .750 reach plug ,for that head, now protrude an 1/8" into the chamber. While I dont think that would cause any clearance issues, it will affect how well you plug will dissipate heat.

Re: Hemi spark plugs [Re: super451b] #1794357 04/01/15 11:06 PM 04/01/15 11:06 PM
Joined: Feb 2003 Posts: 991 Addison,IL OUTLAWSSAA super stock
OUTLAWSSAA super stock Joined: Feb 2003 Posts: 991 Addison,IL	BR8ES

Re: Hemi spark plugs [Re: OUTLAWSSAA] #1794358 04/03/15 09:25 PM 04/03/15 09:25 PM
Joined: Jul 2003 Posts: 12,129 Cleveland sunroofgtx I Live Here
sunroofgtx I Live Here Joined: Jul 2003 Posts: 12,129 Cleveland	Don't forget. If you switch to a 5/8ths plug, the wire set might not work. The 13/16ths plug is 1/4 inch taller.

Re: Hemi spark plugs [Re: sunroofgtx] #1794359 04/03/15 11:11 PM 04/03/15 11:11 PM
Joined: Sep 2006 Posts: 1,131 Home of the Bluegrass MoparJunkie OP super stock
MoparJunkie OP super stock Joined: Sep 2006 Posts: 1,131 Home of the Bluegrass	Rick, should I use the 5/8's or 13/16's??? I forgot what we discussed???? Last edited by gg70rtUcode; 04/03/15 11:46 PM. "It takes a Mopar to catch a Mopar” 1971 Roadrunner FJ6 Sassy Grass 505"RB, 18 spline 4 speed, and Dana 60 with 3.54 2022 Hellcat Charger Widebody Redeye Jailbreak: Hellraisin with 8 speed auto

Re: Hemi spark plugs [Re: MoparJunkie] #1794360 04/06/15 02:35 AM 04/06/15 02:35 AM
Joined: Jan 2005 Posts: 193 Australia T Teamx member
Teamx member T Joined: Jan 2005 Posts: 193 Australia	Stick with the 13/16 plugs as they are the correct length for the plug boot. The 7 is a cold plug for your combo start with a 6 if its going to see a lot of idling you could even go with a 5.Dont forget to cut the washers off the plugs! Last edited by Teamx; 04/06/15 02:56 AM.

Re: Hemi spark plugs [Re: super451b] #1798045 04/07/15 11:41 PM 04/07/15 11:41 PM
Joined: Jun 2005 Posts: 6,257 gulfport, ms, west mi rowin4 master
rowin4 master Joined: Jun 2005 Posts: 6,257 gulfport, ms, west mi	Originally Posted By super451b If your chambers have been worked/cnc'd , you may want to find a way to see exactly how long of a reach plug that you need. I have a set of BB RPM heads in the shop now that have had the chambers cnc'd and because of the material that was removed , the threads for standard .750 reach plug ,for that head, now protrude an 1/8" into the chamber. While I dont think that would cause any clearance issues, it will affect how well you plug will dissipate heat. So with the plugs sticking into the chamber 1/8 inch, do you just stack washers on the plug to correct the depth? Leaving them long , the threads will carbon up and either pull the treads upon removal or break off the plug. What's it going to be? it's ok to butt heads, just don't do it with a butthead

Re: Hemi spark plugs [Re: MoparJunkie] #1801526 04/12/15 08:29 AM 04/12/15 08:29 AM
Joined: Mar 2003 Posts: 1,629 pa 572charger top fuel
572charger top fuel Joined: Mar 2003 Posts: 1,629 pa	i use autolites in my hemi 65's hot for drivin around 64's race on motor and 63's for the spray on pumpgas !!!!! hope this helps , they are cheap also like 14.94 for a set of 8 !!!! 606 hemi pump gas best 9.60 at 142mph on motor 05 hemi daytona 1500 go-mango 4wd quadcab 2007 hotrod mag pump gas drags runner up, roadkill nights dodge big tire winner 2018 2019 back to back

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