Does this housing look ported?

[Chrisk]

Does this look ported and should it be ported more? I'm running a precision 46 external wastegate. On spring pressure my boost is at 27 psi but I don't have a 27psi spring in there. I'm wondering if the turbo needs to be ported more.

Thanks,
Chris

 

[bison]

The more you port it the more the backpressure can act on the wastegate. If you want to run the turbo up near it's max potential the hole will need to be smaller. I've never needed to be over 1.1" on anything of my own. Even the 6265 that everyone else says needs a huge external gate with a big hole. I left the hole untouched and internal gate with heavy sprung actuator and no problems.

 

[Chrisk]

The only control I have is if I want go higher. I can't lower that boost unless I swap springs. My friends car with same setup has the same spring as me and he's at 24 psi.

 

[Sweet6]

The more you port it the more the backpressure can act on the wastegate. If you want to run the turbo up near it's max potential the hole will need to be smaller. I've never needed to be over 1.1" on anything of my own. Even the 6265 that everyone else says needs a huge external gate with a big hole. I left the hole untouched and internal gate with heavy sprung actuator and no problems.

I found that to be true to. Smoothing out the ridge on the WG hole makes a huge difference. At least as far as keeping boost creep under control.

 

[Chrisk]

So what do I do to lower my boost?
Connected or not I'm still at 27 psi but not using a 27 psi spring.

 

[Sweet6]

My buddy has the PTE 46MM gate and has boost issues too. He cant get the manual valve to work So he has to change springs to change the boost. He is around 26-27lbs now too. He has not been able to figure it out yet either.

 

[bison]

I found that to be true to. Smoothing out the ridge on the WG hole makes a huge difference. At least as far as keeping boost creep under control.

I never have boost creep. Boost fall off with some turbos that are out of breath. If you're getting boost creep that you can't get under control and the hole is more than 1.1" you probably have the wrong turbo for the application.

 

[Sweet6]

I never have boost creep. Boost fall off with some turbos that are out of breath. If you're getting boost creep that you can't get under control and the hole is more than 1.1" you probably have the wrong turbo for the application.

I have zero boost control issues. No creep and can adjust the boost from 15lbs to 30lbs. I opened my WG hole to about 1.2" and smoothed out the ridge on my external gate set up just to make sure. On my internal gate setup on my TTA I opened the hole to right around 1.1" and smoothed out the ridge. No creep on that one either.

But I do agree with you. Open the whole to around 1.1 inches and smooth out the ridge on the bottom of the WG hole is all you need.

 

[Chrisk]

Mine is as pictured. Otto said he ported it. I don't have boost creep it just goes to 27psi and sits there.
I guess my main issue is I got a new external DP, new precision WG, XFI 2.0 with boost control that goes to a nice solenoid and I can't control the boost.

My friend has the exact same set up with the same spring and his is controllable.

 

[dpasadena]

Mine is as pictured. Otto said he ported it. I don't have boost creep it just goes to 27psi and sits there.
I guess my main issue is I got a new external DP, new precision WG, XFI 2.0 with boost control that goes to a nice solenoid and I can't control the boost.

My friend has the exact same set up with the same spring and his is controllable.

You might want to check your new down pipe. I had the same issue on a chinese made pipe. It was not the wastegate. Who ever made my pipe only cut a dime-sized hole in the main pipe where the exhausted gas from the wastegate goes. I had to cut my pipe up and make the hole bigger. I have serious boost control now. Can get to as low as 14lbs with a 6262

 

[Chrisk]

You might want to check your new down pipe. I had the same issue on a chinese made pipe. It was not the wastegate. Who ever made my pipe only cut a dime-sized hole in the main pipe where the exhausted gas from the wastegate goes. I had to cut my pipe up and make the hole bigger. I have serious boost control now. Can get to as low as 14lbs with a 6262

I checked my pipe and both pipes from the gate are same size internally.

 

[bison]

Remove the spring from the wastegate and do a run to as high as you would ever rev it. That is the minimum boost you can run. It will have very little power till it gets some rpm. Other than that you need a different wastegate spring or increase the mass flow through the engine to get the boost down under the same wastegate configuration.