Turbine Housing

[Dr Ronald]

I took off my turbine housing to do some porting this weekend. Unfortunately I found that my turbo housing is cracked at the waste gate. The car has (according to what I've been told) a MHI 16g Turbo. What housing do I need to get? Also, the o2 housing is a different from the stock 2g. Is this probably a evo housing? The sensor is located near the outlet instead of where it usually is. Should I still port this? I know this is a noob question, but I've never ported so I have to ask it. When you're porting do you use the stock gasket to port it out to? That is, a ported gasket is not actually a different size than an unported gasket, is it? I also noticed that the manifold is cracked. Would you suggest a tubular manifold over a new cast manifold? Thanks in advance.

p.s. I did search, but was having trouble finding all the answers I need.

 

[92AWDHX40]

You should pm one of the freelancer builders here they will able to answer that, easy way to find out that answer.

 

[JusMX141]

Some photos will provide easy answers for all of your questions.

 

[DSMmonster123]

Just mig weld the cracks and use a dremel or a porting too to grind the beads smooth. worked great on my 16g just make sure to use a good amount of heat. that will alow the welding metal to sink into the cracks deeper.

 

[Bud92gsx]

Photo's would help yes, thanks Justin..

Ok to answer some of your questions.

The crack in the manifold should not cause you any problems..Unless the cracked is all the way through..Then your loosing exhaust gasses, which you know is not good.. If you looking into new manifolds, a ported 2g manifold works great..If your looking for a brand new manifold, FP makes a great cast manifold that is pretty cheap..A tubular manifold is cool, but you cant use the stock heat sheild..Well you cant use that with the fp one either,,I just like using the stock heat sheild myself..

The 02 housing I'll wait to answer that for pics..

The WG hole..They get cracks in them sometimes.and well as long as the flapper still seals your good..But if there is no rush to get the car together..Order a new turbine housing..And you will not have issues..

 

[Dr Ronald]

So I think I answered my turbine housing question. My turbo is a TD05H so I can get a 7cm ebay housing. Should I port this housing when I get it? Here are some pics. The o2 housing on the far left is the one that was on the car. It is different from the other two. There is one shot of that o2 housing. Also pictured is the cracked housing.

 

[Bud92gsx]

Yor turbine housing doesn't look that bad but it is cracked..So if it's not an issue the car being down for a bit I say go ahead an order a 7cm ebay one...But the ebay one is not usually as good as a mhi turbine housing and will also crack..Now another thing with the ebay turbine housing it the the WG arm is kinda small and crappy..It's alot smaller than the mhi one...Just wanted to let you know..But it should be just fine..I've had an ebay turbine housing as has been just fine..

If you can get me the numbers off the compressor housing I will be able to tell you what turbo it actually is..

 

[Dr Ronald]

Its a genuine MHI big 16g. Thanks for the info on the ebay housings. Should I port it when I get it?

 

[Bud92gsx]

Porting is never a bad idea..

Good info.. http://www.dsmtuners.com/forums/art...564-how-port-turbo-exhaust-housing-video.html

http://www.dsmtuners.com/forums/art...oler/186525-how-cure-boost-creep-porting.html

 

[Dr Ronald]

So do I port out to the stock gasket size?

 

[Bud92gsx]

there is a lip on some gaskets..But yes you should port the gasket if you can..The more free flowing the better..

 

[JusMX141]

o2 housing #1 and #2 in the first pic are 1G housings....#3 is a 2G housing. It doesn't matter because all of these flow the same in stock, unported form.

Your turbine housing is trash. Still usable if you have no other option- I've seen far worse that still made boost, but yours is knocking on the door of a major loss in performance and inability to gain proper boost control. That's a 6cm turbine housing from a 14B, by the way- so either you think your turbo is a 16G and it's not, or someone installed a 14B turbine housing on a 16G.

 

[Dr Ronald]

Well I'm glad to hear that this could be causing performance losses. I checked the turbo compressor housing and it said it was a TD05H and the Serial said it was a b16G. Could the wheels be from a 14b and the compressor housing be from a 16g?

 

[JusMX141]

Pics of compressor wheel?

 

[Dr Ronald]

I tried to get a decent one.

Also, I wanted to get a new set of gaskets. I don't want to spend an arm and aleg on a new set of gaskets, so I'd like to just get an OEM set from Autozone. Will these last me decently long? Am I correct in assuming that the stock 2g turbo used a 6cm housing. Is there any car that I can get a stock turbo gasket set for that would include a ported 7cm housing and a ported o2 housing? Sorry for my ignorance.

 

[Bud92gsx]

6 blade x2 means 16g comperssor wheel..

 

[JusMX141]

Appears to be a Small 16G. That turbo should really have a 7cm turbine housing anyway.

If that's the route you choose, you'll need a 7cm turbine housing and an Evo III o2 housing gasket to match the appropriate porting.

 

[Bud92gsx]

Geta better pic of the serial numbers And I'll tell you what 16g it is..

 

[Dr Ronald]

I'm going to be Autocrossing this car. Should I still get a 7cm housing? I've read that the turbo will spool faster with a 6cm housing, but I kind of think that it wouldn't matter too much. Also, it doesn't look like that o2 housing has much room to port. Will I run into structural issues at the divider?

 

[JusMX141]

Geta better pic of the serial numbers And I'll tell you what 16g it is..

....or he could just look for himself.

I'm going to be Autocrossing this car. Should I still get a 7cm housing? I've read that the turbo will spool faster with a 6cm housing, but I kind of think that it wouldn't matter too much. Also, it doesn't look like that o2 housing has much room to port. Will I run into structural issues at the divider?

Unfortunately you don't have much choice....finding a new or good used 6cm housing will be like finding a needle in a haystack.

 

[Bud92gsx]

....or he could just look for himself.

Ya thanks for taking the post of that link away from me..

 

[Dr Ronald]

Well that kind of sucks. I might try welding up the only I have. I did look up the serial, and as I said before, to my knowledge it is a genuine b16g (49178-01420). So as far as porting goes, I've heard that porting the inlet of the housing is more or less pointless. I would probably clean it up a bit and get rid of that lip, but wouldn't do anything crazy. I would definitely port the outlet of the housing. Does this sound like a good idea to you guys? Also, I would port the inlet of the manifold and bit and get rid of the lip on the oulet. (I have read the vfaq a few times)

 

[JusMX141]

Big 16G's never came with 6cm housings, so someone hosed you for sure.

Port the fire ring groove out of the housing and the manifold, then clean toss the fire ring and use the gasket only. You'll benefit most from opening up the throat of the housing in the area of the wastegate flapper.

If you're going to port it, do the porting first- then weld it, and clean up the weld when you're all done. I'd keep the boost below 18psi or you're going to have some serious issues with compressor surge using a 6cm housing on that turbo.