OK so mine sounds fine at low RPM but when you get into boost above say 4K it gets really loud. I am going to check the EGT plug first. Any other ideas??
DP and what ever UP I can get to are tight. Can you get a leak around the location where the WG goes through the turbo?
OK so I drove it this morning and it is still making more noise then usual. I hooked up the AP to check boost and it is only getting to 9psi and that is around when the sound is happening. So I guess I will check the Y pipe next for a crack. Ideas? Bueller, Bueller?
hummm... I was getting a metal buzz at around 4k and had to retighten my race pipe to my mid pipe and this fixed the noise... gool luck with it
Did you look on the bottom side of the dp? There are nuts, rather than bolts and nuts that hold it together down there. You have to be under you car to see it. I know this has shaken loose a few times on my car, and could easily give you some exhaust leak, especially under load. If not, just use the WRX exhaust/intake diagram from scoobymods and follow all the piping and check for leaks everywhere.
Thanks, I will give that a look tomorrow. On the drive to work up to about 4K under regular driving all sound fine. It is once it get on it that she it makes noise. Devinitally exhaust noise. I don't think it is the Y pipe now. I will report findings as soon as I get under her.
Did you replace the UP gasket with a new one when you installed the UP? Does the noise sound like a scream or does it have more bass to it?
I didn't forget my gaskets. All new ones when instlled. It sounds like LiquidForce's external wastegate but not as loud. It has that banging hissing sound of exhaust. I am going to check the exhaust manifold and UP connections next.