[K204DR]

anyone have any links on drilling the wastegate on the hx35? I'm assuming you drill a hole in the center divider so it vents both sides? what size hole do you drill?

 

[estrada5.9]

Bump

Mmm um not trackin here.

 

[K204DR]

I read that you can drill the housing so it vents both sides instead of just one. it currently only vents 3 cylinders when it opens, and can cause boost creep.
Dual k20's has posted to drill it out several times.
after looking at one, I guess you need to take to back housing off, open the wastegate and drill thru the wastegate hole into the center divider.

 

[Dual K20s]

I think there might be a writeup over on DTR that I read once, but I'm not a member there so I can't search.

If I remember right someone once told me it only needs to be 9/16 hole?!?

Another option is to grind out the divider like this

 

[K204DR]

would there be any downside to it? performance loss at low end or anything?

 

[Dual K20s]

It might affect the spool marginally. But I've got a 16cm housing and I can barely tell the difference from stock 12