EFI tuning- Target AFR?

[Brian Devlin]

Most O2 sensor don't distinguish between rich and really rich, it's
pretty much an on-off situation (I think there are some $pecial ones
on some Japanese cars that use an amplifier to get a more linear
signal, but I'm not too sure). Without cycling between rich and lean
you really aren't going to get info from the sensor and the computer
will have to guess. That might be fine for power, but unless you're
adding a smog pump it'll be hard on the cat if it's rich all the time
(if you have one, of course).
-Brian
-86 5ktq

>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