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PostPosted: Thu Nov 08, 2018 4:37 pm 
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Turbo Slant 6
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Joined: Mon Jan 12, 2015 5:55 am
Posts: 653
Location: Brightwood, VA
Car Model*: 1965 Plymouth Belvedere I
I picked up a set of NGK BCPR6ES-11.
I'll see how these run and change the numbers as needed until I find the best heat range.

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http://www.MattmansMopars.com
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PostPosted: Thu Nov 08, 2018 5:25 pm 
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Supercharged

Joined: Thu May 12, 2005 11:50 pm
Posts: 5930
Location: So California
Car Model*: 64 Plymouth Valiant
How about a BR7ET ? (mazda rotary)

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64 Valiant 225 / 904 / 42:1 manual steering / 9" drum brakes
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PostPosted: Fri Nov 09, 2018 7:43 am 
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Turbo Slant 6
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Joined: Mon Jan 12, 2015 5:55 am
Posts: 653
Location: Brightwood, VA
Car Model*: 1965 Plymouth Belvedere I
I don't recall where I read about the extended tip plugs for the slant, but I seem to recall that it was recommended for basically stock engines. I chose the NGK 6779 (BCPR6ES-11) as a starting point, plenty of room to move up or down the heat range. The -11 just comes pre-gapped at .043 and the BC is just a 5/8 hex to fit a special socket I picked up.

Attachment:
NGK-6779-3459(2).jpg
NGK-6779-3459(2).jpg [ 38.84 KiB | Viewed 122 times ]


Quite a difference in these two plugs (tip wise).
Yes, I will be removing the gasket.....

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-Matt
http://www.MattmansMopars.com
Strive for Excellence, not Perfection.


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PostPosted: Fri Nov 09, 2018 2:17 pm 
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Joined: Wed Oct 23, 2002 7:57 pm
Posts: 5474
Location: Waynesboro, Pa.
Car Model*: 65 Valiant 2Dr Post
Quote:
pre-gapped at .043


As I was recently told by people on here much smarter than me, the larger gap doesn't help the peformance at all and may hurt. Just passing it along.

Rick

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2 Mopars come with Spark plug tubes. One is a highly refined, record setting, world class, racing machine. The other is a 426 CI. boat anchor!
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PostPosted: Sun Nov 11, 2018 6:13 am 
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Turbo Slant 6
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Joined: Mon Jan 12, 2015 5:55 am
Posts: 653
Location: Brightwood, VA
Car Model*: 1965 Plymouth Belvedere I
Thanks Rick, I set my plug gap at .040" . I actually missed the part number on the list that is set for that. If I get a -10, they come pre gapped to .040". Not that I trust what comes in the box anyway.
Sometimes I just create more work for myself without thinking (a gross understatement).

UPDATE: Apparently, NGK does not make this plug in a -10, so looks like I just have to re-gap the -11's

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-Matt
http://www.MattmansMopars.com
Strive for Excellence, not Perfection.


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PostPosted: Sun Nov 11, 2018 5:55 pm 
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Joined: Wed Oct 23, 2002 7:57 pm
Posts: 5474
Location: Waynesboro, Pa.
Car Model*: 65 Valiant 2Dr Post
Quote:
BCPR6ES-11.


I'll have to look at work but I think they are used in some new mowers? If that is the case you could pick them up at your local RC engines shop! :D Or at leas I can. :D :D

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2 Mopars come with Spark plug tubes. One is a highly refined, record setting, world class, racing machine. The other is a 426 CI. boat anchor!

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