Turbo hole? (t3/4t)

[4g63telantra]

I have a t3/t4 goin in soon, on the exhaust there is a hole (under the wheel). Must I cover that hole cuz im running a wastegate in the manifold?

 

[psychlow]

A picture might be useful here... I have no idea where you're talking about. Do you mean the hole in the exhaust where the stock internal wastegate would be?

 

[4g63telantra]

ummm your rite, ill get a pic asap

but what i mean is on the exhaust side of the turbo there is the wheel and under that is a small hole.

ill be running a ex.wastegate, so would i have to cover up that hole?

 

[92Fwd4Me]

I THINK he is talking about the internal wastegate. And if he is running an external wastegate....god help me if I am wrong but I think all you need to do is disconnect the actuator portion of the internal. Thats the gold linkage on the side of the turbo.

Again...I may be wrong.

 

[skelly]

If it is an internal wastegate hole, and it sounds like it is, your only recourse is to:

A) replace the turbine housing with one that is appropriate for use with an external wastegate, or

B) Get creative and try to weld shut the opening, or come up with a way to securely affix a wastegate flapper door in the closed position with a good seal/

Option A would be your best bet. Ultimately, you simply purchased a turbo with the wrong turbing housing for use with an external WG.

- SK

 

[99gst_racer]

4g63telantra - I too am running a manifold mounted external wastegate. All you need to do is weld the flapper shut on the turbine housing.

I THINK he is talking about the internal wastegate. And if he is running an external wastegate....god help me if I am wrong but I think all you need to do is disconnect the actuator portion of the internal. Thats the gold linkage on the side of the turbo.

Again...I may be wrong.

NO. That will not work. If you disconnect the actuator arm from the flapper, it will remain open, causing you to never build boost. Plus, I'm pretty sure, from his description, he doesnt even have the actuator or flapper on his turbocharger.

 

[skelly]

Plus, I'm pretty sure, from his description, he doesnt even have the actuator or flapper on his turbocharger.

Sorta makes you wonder what became of the hole through which the shaft for the flapper would normally pass, don't it?

- SK

 

[oldman]

Sorta makes you wonder what became of the hole through which the shaft for the flapper would normally pass, don't it?

- SK

I suspect that might be the hole he's talking about.

 

[99gst_racer]

I suspect that might be the hole he's talking about.

No, the hole he is talking about is the internal wastegate passage. Thats why he says it's "under the wheel". He is basically looking at this, minus the flapper.

You must be logged in to view this image or video.

Sorta makes you wonder what became of the hole through which the shaft for the flapper would normally pass, don't it?

- SK

Yeah, but people have been modifying the internally gated turbine housings like this for years. My T04b has the flapper welded shut. And I have known many people to have 16G's and even 14b's with them welded. It's much easier to weld it shut than it is to fork over the cash for the 'special' housing. And I dont think anybody even sells housings to bolt up to a Mitsu manifold that dont have that hole.

 

[hellotbone]

I THINK he is talking about the internal wastegate. And if he is running an external wastegate....god help me if I am wrong but I think all you need to do is disconnect the actuator portion of the internal. Thats the gold linkage on the side of the turbo.

Again...I may be wrong.

Please don't think its a rule No Guessing - if you don't know the answer, don't reply - bad advice can be worse than no advice (no "I think" or "I guess" or "I've heard")

 

[GST-RIDER 95]

First off this is my Exhaust housing Note the little hole in question is where the exhaust fumes evacuate as the wastegate opens up.
You will be using an external gate so you need to get the a 3/8" thick O2 housing flange fitted with a single port opening at the turbine to block off the flapper hole therefore forcing all exhaust fumes to the single outlet.

 

[GST-RIDER 95]

At this point you need to bolt it to your turbo manifold and find the cherry spot to place your O2 bong!!!!!!!