EFI tuning- Target AFR?

[Michael Gough]

Hey guys,
Just wondering what the best AFR for the Audi 10v turbo motors is. I'm about
ready to install the EFI system, and I need a bit of advice on what air-fuel
ratio I should aim for in high boost. I know that the turbo Dodge motors do
best with a really rich mixture (.9v or more from the O2) but I haven't
really seen this discussed regarding the Audi motors. I just don't want to
melt a piston :) Any help is appriciated.
Thanks
Mike