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-   -   index plugs ? (https://classracer.com/classforum/showthread.php?t=78913)

rod 03-26-2021 08:25 PM
index plugs ?
 
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
Re: index plugs ?
 
towards the piston. keeps electrode away from the piston.

SGSST109E 03-28-2021 08:19 AM
Re: index plugs ?
 
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
Re: index plugs ?
 
Quote:
Originally Posted by rod (Post 637531)
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
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....

Bob Lasko 03-28-2021 02:38 PM
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

terry1 03-28-2021 06:01 PM
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

Bob Lasko 03-28-2021 06:19 PM
Re: index plugs ?
 
Quote:
Originally Posted by terry1 (Post 637636)
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
Re: index plugs ?
 
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
Re: index plugs ?
 
Quote:
Originally Posted by richie 2 (Post 637639)
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


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