I'm posting this for a friend who's computer got a bad virus so I mite not be able to answer some question but I'll try. Here we go: My friend is debating whether to port his turbo to 10.5 hot side or just order a evo9 turbo instead. Which would be more "worth it", isn't the evo9 turbo larger? Whats the over all differences and what would be a better choice? I would help him with this but I'm not exactly an evo expert....yet

Here the site me would order from-
http://www.gruppe-s.com/Evo/evoeng.htm

What's the difference between the last 4 turbos anyway, except that 20g one. Which is the best out of those 3, they all seem to be the same thing? I mean ones an evo9 turbo, another is an evo9 with an aluminized shaft, this seems to be the best choice to me? and the last is duel ported hot side for greater boost control and a reduction in boost creep, (but I haven't heard of that being a major issue.) which you can order and then just add on. Can some one help me?

So I guess I've got 2 questions here...
Thanks

 

Well, first of all, you don't port the turbo into a 10.5. You purchase a 10.5 hotside and then get it ported.

If he gets a IX, it will already have the 10.5 hotside plus the compressor housing is larger, so he would gain from both.

To illustrate your question, it's like asking if you should get IC piping or a FMIC w/piping. They are not comparable. FMIC w/piping includes piping just like an Evo 9 turbo includes the 10.5, so the decision is whether to spent $700 on a new IX turbo or $250 on a 10.5 hotside. Porting is a completely separate issue on both.

 

Thanks, I'll tell him to get the evo9, here, this questions from me because I'm not understanding this. So if you buy a turbo ported to 10.5, then what do you port? Are you saying you buy that part of the turbo and then port it? Sorry for the stupid question I'm just confused.

 

warr is saying to by a 10.5 hotside. THEN have it ported. you cant port the stock 9.8 hotside up to a 10.5 hotside.

 

O, i c. I was thinking that but was not a 100%. So buy the 10.5 hot side and port the rest needed. Still, every time I see a 10.5 hot side being sold they say its a direct bolt on with no added porting. Thanks.

 

Ok.................

03-04s have a 9.8 cm^2 turbine housing (hotside). 05-06s have a 10.5 cm^2 turbine housing (hotside). You're talking about upgrading to a 10.5 hotside, which requires purchasing it from another person (used) or from a shop (new). You can then decide to port it or not - that's up to you. You can also buy a used or new IX turbo, and it will already have the 10.5 hotside per the aforementioned explanation in sentence 2. You could then opt to port that 10.5 hotside, too. It's all up to you what you want to do - this is not confusing.

 

Thanks for explaining it. Wait so an 05 evo8 mr has a 10.5 hot side? I though only the evo9's had then.

 

Goddammit. All 05s have the 10.5!! Hell, even some late 04 models got it, because that's when they started installing them standard at the factory - late 04 when the 05s were being released.

The IX has the same hotside, but that's not what makes it special. What makes it special is the larger compressor housing.

 

What year is your friend´s Evo? If it is a 2003, then his best bang for the buck would be to order a ported 10.5 cm. turbine housing from Buschur Racing. The 10.5 turbine housing can be purchased unported from a vatiety of vendors, however, for a small additional fee, it can be obtained pre-ported from Buschur Racing.

Non-ported refers to the turbine housing as is: the cast piece with only the internal and external mating surfaces, flanges and bolt holes machined. In this state it is ready to bolt on and use and this is how it is assembled onto the turbochargers at the Mitsu factory.

Porting refers to the process whereby the production housing is subsequently modified, usually by grinding its internal passages and port matching to the exhaust manifold with a handheld pneumatic die grinder. Also, the wastegate bypass port can be blended and opened up to improve wastegate efficiency.

Thus a properly ported turbine housing should reduce backpressure and exhaust gas temps via improved cylinder scavenging. The turbine itself should spool more freely and wastegate function should be improved reducing boost creep. You should be able to run a bit more boost and supposedly produce more horsepower.