I have a new exhaust that I'm going to be installing onto my 94 850 Turbo. I did not know there that were two different turbos, the conical and the straight, I saw in one of Tech's threads about installing the exhaust where he got the straight set up and replaced the conical set up on his turbo. if my turbo has the conical set up, does that mean that I'm going to have to get the straight set up to install the exhaust?

Also note, I was told by a couple people in another forum who installed OBX exhausts mentioned that I might need a special gasket for installation which I bought.

http://www.ipdusa.com/version.asp?st...=143&V_ID=4347

This is kind of urgent since I would like to get this installed as soon as possible and would hate to realize that my downpipe won't install properly due to the turbo being shaped funny.

 

here is what I'm talking, you can see the difference, the conical being on the left and the straight being on the right.

I was thinking, because the main difference, besides the internals on the straight being larger, is the fact that the bolts are recessed on the conical, where on the straight everything sits flush. What if I use that gasket and then put some washers in to adjust for the height difference. If your following me.

I don't know if i just answered my own question to my own post, but let me know what you think.

Thanks.

 

Turbo is the way it is and you buy a downpipe accordingly...

You get a downpipe with a conical flange for a conical flanged turbo, you get a downpipe with an angled flange for an angle flanged turbo and you get a downpipe with a straight flange for a straight flanged turbo.

So if you bought the wrong downpipe then either you send it back and get the right one for the turbo your using or your get a turbo to match your downpipe.

You can also manipulate things, but it is best not to because I have a feeling using washers to space things will not work very well.

 

I opened up the box yesterday and the set up came with two DPs. On the description when I bought it it said that one dp for angled housing, and one for straight. Seeing as how the bolt pattern is different on the two turbos I went and looked at the DPs and one has a smaller flange on it, so I think that DP is for the conical turbo, as seen below (the one in back)...



Once I can get my car jacked up I'm going to measure the bolt patterns and compare them to the DP.

 

http://www.quickbrickmotorsports.com...lange_list.htm

This gives models, turbos and flange type.

According to the chart the 1994's came with a Conical flanged turbo.

 

Yeah, I figured that. But if the bolts line up and the "conical" part of the turbo would fit inside the DP, wouldn't it still work then?

 

I think the matching connections will be different. You will need to get the exhaust housing and swap it. OBX I believe does not sell the conical dowpipe.

 

I have a straight flange housing on it's way, good thing I saw your thread about the exhaust, otherwise I would have had no idea and done all that work just to realize that the DP didn't fit.

 

It takes a little temper control swapping it out. But it is not all that bad.

 

How bad is swapping housings? Am I dismantling anything or just unbolting one and putting in the other one? I've had a couple different opinions about it.

 

There is a few ways you can do it. You can remove the entire turbo and do it.
I left the turbo attached and removed the band holding the exhaust housing on and the downpipe and exhaust manifold to housing and slid it out.

 

Hm, I might just take out the whole turbo so I can replace some of the necessary gaskets and seals, and the coolant line that I'm told could be pretty brittle, and that way I can inspect it too to see how it's looking.

 

Sounds like a plan.

 

Yeah....take the whole turbo out.

THen take it apart and clock it the same as stock, so all your lines/hoses will work.

then put that b*itch on!

 

Haha, brought back from the dead. Someone had told me "you want to remove that clamp and pry the compressor out of the exhaust housing"...what is the compressor? And is it something that if I take out wrong will fRuck up my turbo?

 

The compressor housing is the silverish part of the turbo.
The center is the rotating assembly or (CHRA)
Then there is the exhaust housing which you are swaping.

Just be careful not to F-up any of the fins.....

 

OK. So I undo that clamp that holds the two halves together, and then I just carefully slide it out, because the one of the "fans" sits in one of the ends right? But I don't have to take any of that apart.

This is going to be my first time removing a turbo and even looking inside of one, so I'm kind of excited about it, but at the same time I need all the instruction I can get so I don't mess it up.

 

Yep.....Just like tech mentioned....

It is the goldden color clamp holding the housing and CHRA together. just one bolt.
I dont know how much effort it will take but it will slide out. it is a very precise fit.

 

Sounds simple enough. This shouldn't be too bad then. I think the hardest part will be getting the turbo out. I got new seals and what not today in preparation.

I can't wait for my car to not sound like the exhaust tip sticks out by the drivers side door (it's got a slight hole).

I'll take pictures and post them in the Exhaust section and let you know how installation of the OBX exhaust goes for future reference for others.

 

Cool waiting for update!!