Tubzzz14

iTrader: (1)

hey i have a ets downpipe with external 02 dump stock cats and a ets catback.

I want to run cobb stage 2 is it calls for a full tbe buit when im on boost i have my 02 d ump open does that help?

evo unknown

iTrader: (25)

The AP Map is built off tuning with an internal O2 housing. I believe the O2 dump will cause the mapping to be slightly off because the exhaust gases flow rate and EGTs will be altered from the O2 dump. I would suggest getting a custom tune and avoiding the AP or get a custom tune loaded on the AP.

dericchan1

iTrader: (2)

I would suggest getting a custom tune and avoid the AP altogether.

mrMTB

iTrader: (13)

You will probably be fine, but I suspect you'll get the occasional over-torque warning from the open dump.

Kracka

iTrader: (49)

You might want to consider the LWG maps since your o2 dump might cause higher boost levels. Just log it and find out

COBB Tuning

The increased airflow COULD mean slightly overboosting, but you can simply monitor your live data and/or datalog and see exactly what your car is doing. A protune is not a bad idea either. You will be able to take advantage of that dump tube and run more boost safely. Once you remove restriction off the back of the exhaust turbos tend to just want to flow...

Travis
COBB Tuning