Rcc Install Instructions

What's going on with this wastegate? 2 holes??

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What's the point?

Hard to say . . . I have seen some idiotic stuff done by alleged "mechanics" that actually have no clue at all. It shouldn't affect anything
negatively . . I would probably remove that nipple and put a threaded plug in there, and then put the banjo bolt and fitting in the center hole.
Whatever you do, do NOT plug both those holes.
 
I have seen some modified to have the base spring pressure adjustable
there would be a lock nutted bolt or thread in the middle acting on a plate that the spring seated on , you would see the plate just inside the cover through the centre hole
you can plug either hole if this feature is not complete or you dont want to use it , 1/8npt
 
Too small of air filter on a turbo can create a vacuum at the inlet. On a turbo this is bad this vacuum will actually pull the oil past the seals.
Had a brand new turbo pull past the seals and completely damaged it. Bought a brand new second turbo and it started again to pull oil past the seal again. Pulled air filter off and no more issues. Put the small one back on issues.
Went with a large cone and good to go.

This was after I kept being told -
Drain too small not draining properly
My bike is pushing too much blow by past the rings (check rings)
Leak down and compression just fine
Use a check valve it's leaking back into the turbo. Check valve already installed
Use a smaller restrictor on the turbo
Even put a mechanical scavenge pump on. Same thing

Small filters should not come with kits at all. Even a small journal bearing was affected.

So when the second brand new turbo started to 'leak' I took it to a very large garret retailer who actually sells RCC their turbos. They said let me look at the filter. When I showed them they said that's the problem and explained the vacuum.
I did my own research and sure poop too small of air filter on turbo applications can definitely be a cause.

Sucks it cost a $1300 turbo because of filter too small for the application.
What really pissed me off was being told it's something with what I had done, it's just something with my bike.

Haven't had a problem since moving to a larger filter even after multiple hard ass dyno runs at over 400hp.

Switch now is my .02 on a lot of money spent learning
Wow good to know...
 
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