plug index washers

[jacksoni]

I know plug indexing has been discussed here but I can't get anything to come up on a search. Putting aside whether it is worth any HP, does the increased (or reduced) thickness of the washer make the plug behave hotter or colder?

Thanks

[bigjoe1]

NO !!!!!!!!!!!!!!



JOE SHERMAN RACING

[pamotorman]

it does change the ignition timing on that cylinder. .020 is about 1 degree in timing

[jacksoni]

Thanks guys!

[BOOT]

Some prefer to buy a lot of plugs, mark them, then find the one to fit each cylinder pointed where you want.