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Performance Modifications for the NG900 / Old 9-3 This forum contains PERFORMANCE related Q&A's for the NG900 and 9-3. This may also include suspension.

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Old 01-20-2013, 02:58 PM   #1
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hey guys got a exhaust mani question?

hey there I found a nice aftermarket exhaust mani I like, it is for a 9000 2.0 would that fit on my 99 9-3 2.0?

Here is the link

http://www.ebay.com/itm/OBX-Turbo-Ma...491a54&vxp=mtr

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Old 01-20-2013, 03:25 PM   #2
 
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No.

Will not bolt up to your downpipe without welding on an extension, and you'll need to remove your AC compressor.
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Old 01-20-2013, 03:28 PM   #3
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My UN-educated answer would be yes.

But, someone will know more then me.


Edit: Mike beat my response
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Old 01-20-2013, 03:41 PM   #4
 
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The NG900 manifold is offset about 4 inches to the right to clear the AC compressor.

It will bolt up to the head just fine, though...
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Old 01-20-2013, 03:41 PM   #5
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I'm not worried about it bolting to anything but the head, as long as the exhaust mani uses the same bolt pattern thats what I am worried about. I will build my own custom down pipe out of some mandrel bends. easy peasy!

Oh and A/C is for wussies lol
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Old 01-20-2013, 04:02 PM   #6
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You guys are awesome! I love this forum by the way! I always get my answers asap here. rather than open a new thread can anyone tell me if the disco potato (gt2871) spools and pulls good with the 2.0? I found a cheap one from a local guy for 200! just needs a rebuild. But I remember from my turbo horizon I built that the disco potato was a golden turbo to find.
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Old 01-20-2013, 05:17 PM   #7
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I have a GT3076-WG on my 9-3 and it spools great and pulls hard. I imagine the 2871 would feel great as well. I believe the disco potato is the 2860 so the 2871 would have a little more top end. Unfortunately when you say it needs a rebuild, its not that easy or cheap. Garrett Ball Bearing CHRA's aren't rebuild-able. You'd have to get a brand new center section for almost $900 or you might be able to qualify for Garrett's BB exchange service which would cost about $500. I just had to get a new CHRA for mine which was "suppose" to be good. Of course I had to pay pull pop since the CHRA wasn't even salvageable (destroyed the bearing cartridge, housing and both wheels). It wasn't fun.
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Old 01-20-2013, 05:47 PM   #8
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Quote:
Originally Posted by EggYolkedZX3 View Post
I have a GT3076-WG on my 9-3 and it spools great and pulls hard. I imagine the 2871 would feel great as well. I believe the disco potato is the 2860 so the 2871 would have a little more top end. Unfortunately when you say it needs a rebuild, its not that easy or cheap. Garrett Ball Bearing CHRA's aren't rebuild-able. You'd have to get a brand new center section for almost $900 or you might be able to qualify for Garrett's BB exchange service which would cost about $500. I just had to get a new CHRA for mine which was "suppose" to be good. Of course I had to pay pull pop since the CHRA wasn't even salvageable (destroyed the bearing cartridge, housing and both wheels). It wasn't fun.
That's kinda of scary I am better off just buying a TDOx turbo that I know I can rebuild!

Let me tell you my story. I won 1500 bux at the casino the other day (dropped in 10 bux after me and the wife went to dinner and blamo!) so I am going to use this for my saab so trying to find the biggest bang fo my buck. I just finished a fresh rebuild and did the suspension all up. So I am gonna have Mike D tune it but just need to get a turbo that can flow and not cost me a fortune. I would like to have enough for some interior work and a turbo but we'll see how th turbo hunt goes!
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Old 01-20-2013, 05:51 PM   #9
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If you are going to just do a TD04 then just use the stock manifold. It will flow enough up to about 400hp. That will save you some money to put elsewhere and get more HP to the wheels.
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Old 01-20-2013, 06:04 PM   #10
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I sent you a PM about a td04 6cm2 turbo I pulled off a parts car.

I'd really recommend any td04. They are cheap and do what you need... and then some ... in the power dept. and they are cheap. Also they are very robust. And cheap. You could buy two for 1 rebuild of a disco turnip.
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Old 01-20-2013, 07:44 PM   #11
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...and the stock manifold can do 400+hp anyway.



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Old 01-20-2013, 08:15 PM   #12
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All great points Gentlemen! the shiny chrome is very enticing! lol
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Old 01-20-2013, 09:58 PM   #13
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that is the manifold from the 9000s I have one that came off my td04 I got from a 9000. if you want it ill sell it for 30 dollars to you pm me if interested
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Old 01-21-2013, 07:40 AM   #14
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...and the stock manifold can do 400+hp anyway.
ehhhhhh

Just because it can, doesn't mean it's the best tool for the job.
I can bang nails with a rock, but wouldn't a hammer be a better tool?

I'm not saying that this manifold is the best (I wouldn't install it without reinforcing it), but why stress parts that can be replaced easily?
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Old 01-21-2013, 07:41 AM   #15
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Also, there's likely no problem with buying a cast-iron 9000 manifold and spending some time with a die grinder opening up the ports for muuuuuuch less.
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Old 01-21-2013, 10:49 AM   #16
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if your going to build your own down pipe, why not just buy the exhaust manifold flange and weld up your own header?

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Old 01-22-2013, 03:17 AM   #17
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if your going to build your own down pipe, why not just by the exhaust manifold flange and weld up your own header?
good point, also that manifold doesny untilize any of the things you really want in an exhaust manifold, IE its not an equal leangth,

if you are making an aftermarket turbo mani, make sure its equal leangth. this is the only surefire way to get real performance out of it!
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Old 01-22-2013, 04:04 AM   #18
 
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Quote:
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good point, also that manifold doesny untilize any of the things you really want in an exhaust manifold, IE its not an equal leangth,

if you are making an aftermarket turbo mani, make sure its equal leangth. this is the only surefire way to get real performance out of it!
This...

The OBX manifold is just a shiny version of the stock cast iron one.
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Old 01-22-2013, 07:02 PM   #19
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I actually thought long and hard about making a equal length manifold but I am not sure I am good enough to be able to get all those bends in the right places and such. It would def be fun to try though!
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Old 01-23-2013, 02:03 AM   #20
 
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Get a cheap set of carbide grinding bits from Harbor Freight and open up your existing manifold at the runner entries to slightly larger than the head ports. Widen it slightly at the flange, then open up the turbo exhaust housing to slightly larger than the flange opening.

The manifold is way, way down the list of power adders...
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