>
> I've started driving it harder, but I'm worried that I'm hearing
> knocking / pinging under load at high RPMs.   I'm very familiar with
> how the VW inline-4s sound when pinging, but not so sure about the
> wasserboxer.   Are they prone to it like the i-4s?  The sound i'm
> hearing is pretty subtle, but that may be due to road noise covering
> it up.
>

How about the simple things first, like  is the gas itself?  Maybe its
borderline on the octane rating? Take out a loan :-) and put some premium in
there? Even if its only a few gallons, that will boost the octane and maybe
give you the easy  solution? I hope so <shrug>

John