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[GMCnet] Indexing Spark plugs [message #350624]

Wed, 11 December 2019 20:25

BobDunahugh

Messages: 2465
Registered: October 2010
Location: Cedar Rapids, IA

Karma: 11

Senior Member

Yes. It's a detail. But I do it in all engines. I'll buy 12 to make a set. Then keep the extras for the next install. Makes for a smother. More efficient combustion chamber flame front. It's another small part. Of the reason that you can wipe the inside of my 403 tail pipe with a tissue. And the tissue will remain white.
Bob Dunahugh
78 403 Royale
4 Real COPO Yenkos
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Re: [GMCnet] Indexing Spark plugs [message #350625 is a reply to message #350624]

Wed, 11 December 2019 22:53

jimk

Messages: 6734
Registered: July 2006
Location: Belmont, CA

Karma: 9

Senior Member

Bob,
JUDSON back in the 90's solid a and I ue to do that.

On Wed, Dec 11, 2019 at 6:26 PM Bob Dunahugh via Gmclist <
gmclist@list.gmcnet.org> wrote:

> Yes. It's a detail. But I do it in all engines. I'll buy 12 to make a
> set. Then keep the extras for the next install. Makes for a smother. More
> efficient combustion chamber flame front. It's another small part. Of the
> reason that you can wipe the inside of my 403 tail pipe with a tissue. And
> the tissue will remain white.
> Bob Dunahugh
> 78 403 Royale
> 4 Real COPO Yenkos
> _______________________________________________
> GMCnet mailing list
> Unsubscribe or Change List Options:
> http://list.gmcnet.org/mailman/listinfo/gmclist_list.gmcnet.org
>

--
Jim Kanomata
Applied/GMC, Newark,CA
jimk@appliedairfilters.com
http://www.appliedgmcrvparts.com
1-800-752-7502
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Jim Kanomata
Applied/GMC
jimk@appliedairfilters.com
www.appliedgmc.com
1-800-752-7502

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Re: [GMCnet] Indexing Spark plugs [message #350631 is a reply to message #350624]

Thu, 12 December 2019 08:19

Chris Tyler

Messages: 458
Registered: September 2013
Location: Odessa FL

Karma: 7

Senior Member

Defintely a requirement when running domed pistons. Never seen any difference with flat tops.
But it certainly cant hurt!

76 Glenbrook

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