Hi there
I'm in process of tuning intercooled TT C5 with 9.4CR with COS3 Car will see 20 PSI of boost in
hot climate 35C weather
So what AFR should i tune it to ?
will 11 flat AFR be too rich ?
should i tune it to Mid 11 as the low boost cars ?
Is there any way to command leaner AFR for low boost like 5-10PSi then make it richer ?

Any help will be appreciated
Thanks in advance