Spark plug gap question

[marc_scirocco at sympatico.ca (Mtl-Marc)]

I have no idea what copper plugs should gap to. I am using these fancy 4
electrode platinum spark plugs.

Cheers.

Marc

> 
> Now I know that the Bosch coppers come pre-gapped (.036)  The latest
> copper plug ID is WR7DC.
> 
> The Bentley, venerable and out of date as it is, calls for the plugs
> w/ IDs of WR7DS or W7DTC.  I will assume the current one has
> superceded these IDs.
> 
> Here's the thing - the Bentley calls for a .028 gap on those old
> plugs.  The new ones are gapped at .036, which is a considerable
> difference.
> 
> Should I run with the pre-gap and be done with it?  Have they
> lengthened the gap because electrode materials may have become more
> durable?  I'd like to think so.
> 
> Gotta do the Mk1 and Mk2 ignition stuff today, and I'd like to set it
> just right.
> 
> Thanks, and happy wrenching to all this Saturday.
> 
> -Phil