Random question here. Tried to search and see if it had already been answered, couldn't find anything.
I'm running a stage 2 setup with a catless uppipe and downpipe with an AEM cold air intake. I've got the Accessport Stage 2+ OTS tune as of now while I saw a bit for a pro tune. Now for the question. When I really step on it getting on the freeway or just for shits and giggles I hear a chirping/chatter coming from the turbo side of the engine bay when at high RPM 4500+. With our stock turbo with an internal wastegate is that just the wastegate opening and closing and opening and closing or something else?