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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 12-01-2007, 01:38 PM   #1
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turbo manifold?

Do you guys like this style?This is for the 9000 cars and they have to tuck the turbo up tight to the block and this was the only way to do it.On the 9-3/ng there seems to be alot more room to work with.








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Old 12-01-2007, 01:45 PM   #2
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That looks like it would work well.
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Old 12-01-2007, 01:45 PM   #3
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chuck can we find out if my holset will work with one these
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Old 12-01-2007, 02:03 PM   #4
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chuck can we find out if my holset will work with one these
I know someone who wants a manifold for the same motor and turbo so I am sure he would let us borrow his turbo to build a custom one.
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Old 12-01-2007, 04:30 PM   #5
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chuck can we find out if my holset will work with one these
The Holset that you (and I) have will fit in the stock location on either a 9000 or 9-3 given the correct flange on the exhaust manifold.

So if the geometry is the same as stock it will fit.
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Old 12-01-2007, 04:32 PM   #6
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Turbo Manifold?

Yes, please.

Christmas is coming right up
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Old 12-01-2007, 04:37 PM   #7
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The Holset that you (and I) have will fit in the stock location on either a 9000 or 9-3 given the correct flange on the exhaust manifold.

So if the geometry is the same as stock it will fit.
JK where have you/plan on getting banjo bolts for yours
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Old 12-01-2007, 05:11 PM   #8
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Well, the oil return, I will use a oil return tube from a saab (I fit up a T3 return tube, and it should work fine on my car, pretty much like stock).

For the oil feed, I'm not to worried, I probably have something that will work in my garage, I haven't lost sleep on this issue.
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Old 12-03-2007, 04:22 AM   #9
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If you guys want manifolds for custom type turbos you better get those turbos to me.Thats what we should do next.
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Old 12-03-2007, 05:27 AM   #10
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I thought you were going to make them all with external wastegate setups?
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Old 12-03-2007, 05:39 AM   #11
 
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Hey Chuck....

Many folks have done the GT series upgrades, and for a GT28/30 that turbo flange needs to be centered between the 3 and 4 cylinders to have any hope of the intake pipe clearing the AC compressor...

The AC compressor in a 9000 is up at the top of the engine, while in a NH900/9-3/9-5 it's down low....which is why even the stock intake pipes all have that severe sharp bend just before entering the turbo.

The Holset 35-40-40x-45 might have the same problem, as their compressor sides are fairly large.
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Old 12-03-2007, 06:22 AM   #12
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Mike, i got my clutch in and the intake certainly sucked shut like you said it would...
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Old 12-03-2007, 07:19 AM   #13
 
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Sounds like that beastie has come alive!

Pinching off the flow is always a nasty problem with a squared-off intake pipe and a silicone elbow....unless you adapt the intake pipe to fit all the way down iinto the belly of the elbow..
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Old 12-03-2007, 07:31 AM   #14
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Sounds like that beastie has come alive!

Pinching off the flow is always a nasty problem with a squared-off intake pipe and a silicone elbow....unless you adapt the intake pipe to fit all the way down iinto the belly of the elbow..
We're looking into it. I have no time for a project car right now, and this is exactly what i've got.
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Old 12-03-2007, 11:28 AM   #15
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Originally Posted by mike saunders View Post
Hey Chuck....

Many folks have done the GT series upgrades, and for a GT28/30 that turbo flange needs to be centered between the 3 and 4 cylinders to have any hope of the intake pipe clearing the AC compressor...

The AC compressor in a 9000 is up at the top of the engine, while in a NH900/9-3/9-5 it's down low....which is why even the stock intake pipes all have that severe sharp bend just before entering the turbo.

The Holset 35-40-40x-45 might have the same problem, as their compressor sides are fairly large.
Yep, the flange will need to be located towards cylinder 4 or "up high".
Here are a few photos of one "side mount" where the problematic area with the AC compressor can be seen
http://www.stcf.net/viggen/tube2.jpg
http://www.stcf.net/viggen/tube.jpg
http://www.stcf.net/viggen/tube1.jpg
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Old 12-03-2007, 12:31 PM   #16
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I love the way your manifold looks against the motor Chuck. Plan on making a few extra?
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Old 12-03-2007, 01:46 PM   #17
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Yep, the flange will need to be located towards cylinder 4 or "up high".
Here are a few photos of one "side mount" where the problematic area with the AC compressor can be seen
http://www.stcf.net/viggen/tube2.jpg
http://www.stcf.net/viggen/tube.jpg
http://www.stcf.net/viggen/tube1.jpg
The one in the pic is actually a 9000 one.I havent done the 9-3 one yet but I like that design so its kinda what I am shooting for.

If I can get the rest of the 900 ones tacked up I will start taking orders for the 9-3 ones.I just wanted to run it by you guys first.
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Old 12-03-2007, 01:58 PM   #18
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It looks like the way that one has the turbo tucked under, there won't be much clearance for larger turbos... But then again, I would need to see this installed in a car to get a better idea.


I'll be looking for a NG900/OG9-3 turbo manifold here this spring.. with a bigger turbo. But we'll see.
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Old 12-03-2007, 02:28 PM   #19
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It looks like the way that one has the turbo tucked under, there won't be much clearance for larger turbos... But then again, I would need to see this installed in a car to get a better idea.


I'll be looking for a NG900/OG9-3 turbo manifold here this spring.. with a bigger turbo. But we'll see.
The flange layout is the same as the stock 9000 on that one(because it is a 9000 one).
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Old 12-03-2007, 02:38 PM   #20
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Quote:
Originally Posted by BF!ChuckB View Post
The flange layout is the same as the stock 9000 on that one(because it is a 9000 one).
Even on the NG900/OG9-3, I wouldn't want the turbo flange position to be same as stock. When moving to the larger GT series turbos, in the past, people had to get custom manifolds because they wouldn't fit with the stock manifold. Or they would have to use a spacer to move the manifold away from the block.


On a C900, there arent as many issues with slapping a larger turbo on the stock manifold for fitment reasons, and the tubular manifold should have benefits over the poorly designed C900 stocker. But on the NG900/OG9-3, the stock manifold performs pretty well, it just becomes a fitment issue with larger turbos. So having a stock-placement for the turbo flange doesn't seem like such a good idea to me on this up-coming manifold.


Just some thoughts/ideas.
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