there is much info on this forum about the shrouded ATS, but it gets very confusing. Ziggy has a nack for putting it in words I can understand. What say you Ziggy?

 

I believe ATS worked with garrett to develop the GTP38r, and released their ATS housing right before the GTP38r came out. So I would not be surprised that the blue graph above has some similarities such as offsetting upward and more line on the right. I can not find anything relevant information about the housing, such as if they increased the AR of the compressor housing, which means more flow, less surge, but less spool.

 

I have never had one, but from my understanding this is what I get from it:

The housing itself is pretty much the same, other than a 4'' opening, and surge ports machince into the housing.

You have 2 options when you have surge, either a WW or ported housing. The WW flows slightly less air to not "out run" the housing in other words.
The ATS ported housing fixes the problem on the housing side instead of the wheel. Thust allowing you to keep a compressor wheel that flows a little more than the WW. It also helps out flow on the intake side going into the turbo.

A turbo with the ATS housing doesn't really flow anymore air than a stocker. Other than when the stock turbo is not flowing much air bc its surging. In other words, it flows the same cfm, same spoolup, same max boost as a stock turbo, just without the turbo.

If that makes any sense

 

You can also change the turbine housing, bigger AR help with surge as well. It also helps with power at upper rpms and lower's EGT's. All at the cost of slower spool-up.

From what I hear is that the van's turbo has the same compressor side, but a 1.15 AR turbine wheel.

 

Bigger exhaust housing does work
I rebuilt a Turbo for Mike. With a 1.0 housing and he said it def helped

 

This question got passed up on the last page

 

The van Turbo will be a touch laggier on the bottom end but pull harder and longer up top

 

Any idea what jump in HP and TQ might be there?

 

30-50 HP / 60-100 tq depending on supporting mods and hpop health

 

All the mods that are done to my truck are in my sig., supporting enough? Ive only got 101K and my HPOP has no issues., is there anything else I can spend some money on lol

 

Have you ran ur truck on AE to verify hpop pressure vs duty cycle in all of ur tunes?

 

That I have not done, I dont have access to that

 

Where are u located? I'm sure someone on here would help. Data log ur truck with thiers if they are near u

 

Monroe, Michigan. South of Detroit but just north of Toledo Ohio

 

I would talk to Joey about a modded 17* hpop if you are looking to put money towards something, unless you are planning on going with bigger inj and turbo later on down the road