Shiv,

I installed you Xede on a Evo with downpipe and exhaust and I am using 100 octane with your 94 map. I am noticing a "pressure" build up noise which I think is coming from the BOV. It is as if the engine is over pressured. Should I change the BOV (I am still using the stock) or do you have any suggestions. This only occurs when the tach is over 5k and I am attempting to shift faster. I does not occur during reasonable driving scenerio's.

 

It's normal to hear more turbo noise once boost is raised. Especially when you install a free flow exhaust. It's remotely possible that your BOV is leaking. Before swapping things out, you may want to hook up a boost gauge to confirm that your boost is where it should be.

Regards,
shiv