sv650_ck

iTrader: (10)

What's this hole for - pressure relief? Just noticed air (intake) coming out of it at idle. There's another one on the bottom but it's not venting.

Braineack

iTrader: (62)

It's purpose is to mount a wastegate; it needs to be plugged with a bolt.

wayne_curr

iTrader: (8)

Those 2 holes are on my SR20 T25 for the stock WGA mounting. One goes all the way through, put a bolt in it to seal it up.

Edit: Brain wins.

sv650_ck

iTrader: (10)

Thanks. It's been this way since it was first installed. I wonder why Begi didn't plug it or make mention of it in their manual.

cjernigan

iTrader: (13)

Wow, you've been running that way since it was installed?
Your turbo has been working hardddddddd to prduce that 8 psi you've been running. You're gonna notice a difference when you plug that hole.
Use a short bolt and put some sealant on it, but not so much that it gets in the housing, just the threads.

Braineack

iTrader: (62)

and turn your MBC down.

sv650_ck

iTrader: (10)

With it plugged, it definitely has more go. Of course the boost is up almost 1psi - will have to loosen the MBC up.