index plugs ?

rod · 03-26-2021, 08:25 PM

SBC angle plug heads. does the plug gap go towards the piston or the head?
thanks Rod in AZ

richie 2 · 03-27-2021, 10:15 AM

towards the piston. keeps electrode away from the piston.

SGSST109E · 03-28-2021, 08:19 AM

The reason is to keep the gap from closing if the piston were to hit the grd strap

rod butcher · 03-28-2021, 11:05 AM

Quote:

Originally Posted by rod

SBC angle plug heads. does the plug gap go towards the piston or the head?
thanks Rod in AZ

Electrode strap should be between 11 and 1 o'clock Use a marker to put a line on porcelin and you may need 12 plugs to get all 8 indexed correctly..

MR DERBY CITY · 03-28-2021, 01:04 PM

If the plugs are indexed incorrectly, you will probably know after the first run down the track. That’s how I found out ......As usual , ROD BUTCHER is correct ......I always buy a ten pack of plugs....

Bob Lasko · 03-28-2021, 02:38 PM

If with 10 plug you can't get them index correctly, Moroso sells indexing washers.

Moroso 71910 - Moroso Spark Plug Indexing Washers. They have 4 different washers

Bob

terry1 · 03-28-2021, 06:01 PM

Bob, the washers you have/use, are they the ones that are sort of hollow/concave?
What I mean is the ones I had were hard to "seat" ; I never really knew if
my plugs were tight or not.
Terry K

Bob Lasko · 03-28-2021, 06:19 PM

Quote:

Originally Posted by terry1

Bob, the washers you have/use, are they the ones that are sort of hollow/concave?
What I mean is the ones I had were hard to "seat" ; I never really knew if
my plugs were tight or not.
Terry K

Terry,
When I use them I tighten the plug till tight. The one's that I use are not hollow.

Bob

richie 2 · 03-28-2021, 06:20 PM

two kinds of index washers avialable.... flat or tapered. flat for early heads and tapered units for taper seat style plugs...

Bob Lasko · 03-28-2021, 06:30 PM

Quote:

Originally Posted by richie 2

two kinds of index washers avialable.... flat or tapered. flat for early heads and tapered units for taper seat style plugs...

I have the tapered plugs

Bob

03-26-2021, 08:25 PM	#1
rod Member Join Date: Dec 2009 Location: Kingman, NW AZ. in the middle of the longest stretch of Route 66 Posts: 308 Likes: 0 Liked 17 Times in 13 Posts	index plugs ? SBC angle plug heads. does the plug gap go towards the piston or the head? thanks Rod in AZ

03-27-2021, 10:15 AM	#2
richie 2 Senior Member Join Date: Feb 2009 Posts: 925 Likes: 332 Liked 161 Times in 74 Posts	Re: index plugs ? towards the piston. keeps electrode away from the piston.

03-28-2021, 08:19 AM	#3
SGSST109E Member Join Date: Jun 2007 Location: NJ Posts: 347 Likes: 54 Liked 126 Times in 60 Posts	Re: index plugs ? The reason is to keep the gap from closing if the piston were to hit the grd strap

03-28-2021, 01:04 PM	#5
MR DERBY CITY VIP Member Join Date: Feb 2014 Location: Derby City, USA Posts: 3,353 Likes: 902 Liked 6,726 Times in 1,309 Posts	Re: index plugs ? If the plugs are indexed incorrectly, you will probably know after the first run down the track. That’s how I found out ......As usual , ROD BUTCHER is correct ......I always buy a ten pack of plugs.... Last edited by MR DERBY CITY; 03-28-2021 at 06:13 PM.

03-28-2021, 02:38 PM	#6
Bob Lasko Senior Member Join Date: Jan 2002 Location: Wilton,CT Posts: 608 Likes: 0 Liked 168 Times in 49 Posts	Re: index plugs ? If with 10 plug you can't get them index correctly, Moroso sells indexing washers. Moroso 71910 - Moroso Spark Plug Indexing Washers. They have 4 different washers Bob

03-28-2021, 06:01 PM	#7
terry1 Member Join Date: Sep 2006 Location: Moncton, N.B. Posts: 276 Likes: 24 Liked 24 Times in 13 Posts	Re: index plugs ? Bob, the washers you have/use, are they the ones that are sort of hollow/concave? What I mean is the ones I had were hard to "seat" ; I never really knew if my plugs were tight or not. Terry K

03-28-2021, 06:20 PM	#9
richie 2 Senior Member Join Date: Feb 2009 Posts: 925 Likes: 332 Liked 161 Times in 74 Posts	Re: index plugs ? two kinds of index washers avialable.... flat or tapered. flat for early heads and tapered units for taper seat style plugs...