I was wondering if it is beneficial to remove the TGV's. Im looking to purchase a WRX that has been tuned, and one of the changes was having the TGV's removed and sealed off. I was just wondering what youre opinions were on this or objections. Thanks.
From my understanding they are butterflies within the intake that open and close. And to open them permanetly would allow more flow of the intake. This suposedly(not tested) creates more top end power, also i believe the STI does not have any TGV's, this would point to more performance. Not sure on this one though, but it sounds logical.
I have the Spec C TGV housings (no butterfly, no plate, no nothing - just open). If the car is cold when I start it - it will lean out SEVERELY on partial throttle boost. EGTs go over 940 C quickly. But, if i just turn it off and start it again once its warm - then its fine.
PS - you definitely pick up some airflow with this mod. I also got them ceramic coated and it keeps a fair amount of heat out of the intake manifold.