[urq] knock sensor unit on WR engines?

[AudiQtroCp at aol.com]

I actually went to the junkyard and got enuf parts to adapt the APC system to 
the UrQuattro but before getting around to installing it, the site that 
outlined the upgrade for volvo cars is gone and the guy ( bertram? ) is nowhere to 
be found, looks like his site expired and he never brought it back up...

many weblinks point to his site but its inactive - if you search for VOLVO 
TURBO APC you'll get hundreds of sites linked to his original site, but the 
links are all dead.