Re: what is a modern plug for 1928 533, 6 cyl?

Posted by DavidM On 2012/11/18 15:42:48

What a great web site for all of us who did no know about it, thanks Owen for posting.
I was going to suggest to Updraft that he use modern 14mm spark plugs with 7/8" adapters as I have in my Packards but if the correct ones are available then thats the way to go.
Also using thread adapters could affect the heat transfer from the plug and therefore the heat range.