What AFR to aim for TT 20 PSI car

[wesam]

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

[wesam]

Any body ?

[limited cv8r]

In COS3 there is {A0009}Boost VE Table.

[wesam]

yes i know but this table will not control commanded AFR by boost
i know i can command 11.5 using PE and make it rucher in this table in the high boost coulmns but i dont like to tune it like that

[limited cv8r]

There is also {B3613 PE Map Threshold},you could tune the boost VE up to 5-10PSI then activate PE after that??

[joeygc5]

In COS3 there is {A0009}Boost VE Table.

In my 2001 Corvette twin turbo setup. I use the Boost VE only and have PE disabled. I'm able to command whatever air/fuel I want in the A0009 table by manipulation of the VE value. It's just a manipulation of the VE value and adjusting the Boost VE from what your open loop commanded fuel value is set to in the cell's before going out of range. I use Methanol/water for IAT cooling as well and target 11.3-11.6 AFR for 4500-7000 @ 18-20psi(my high boost setting)