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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 11-21-2007, 05:27 AM   #1
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Intercooler questions??

Do the NG900 and the old 9-3 intercoolers interchange?
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Old 11-21-2007, 05:42 AM   #2
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Yea, but the NG's had a dual pass and MOST 9-3's had a crossflow. There is an turbo - IC pipe that is needed to convert a dual pass to crossflow.
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Old 11-21-2007, 05:59 AM   #3
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So what kind of gains are people seeing by upgrading the stock coolers?
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Old 11-21-2007, 06:02 AM   #4
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Youll see a signifigant improvement using the cross flow over a dual pass, but its still a very limited IC, plastic end tanks which have been known to blow out, small surface area etc...

Im sure I dont need to say it to you, but Ill toss it out there anyway. Peak HP numbers may increase a bit by upgrading the stock intercooler, but the real improvement comes in the ability to make and hold higher boost pressures at cooler temps. Something youll really notice during the summer months in these cars.
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Old 11-21-2007, 06:50 AM   #5
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... but the real improvement comes in the ability to make and hold higher boost pressures at cooler temps. Something youll really notice during the summer months in these cars.
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Old 11-21-2007, 07:14 AM   #6
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I had no problem heatsoaking the stock IC on my old 9-3 when it was stock.

The NG IC kinda sucks. The 9-3 one sucks a little less.
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Old 11-21-2007, 07:19 AM   #7
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The NG IC kinda sucks. The 9-3 one sucks a little less.
Well put Andy! Its really not a worth while investment to put a Vig/9-3 IC in unless its something you got for free/had kicking around.
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Old 11-21-2007, 07:23 AM   #8
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Well put Andy! Its really not a worth while investment to put a Vig/9-3 IC in unless its something you got for free/had kicking around.

Yep.


If you are going to do all that, you might as well buy a good one.
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Old 11-21-2007, 07:59 AM   #9
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So we need to get rocking on some decent reasonably priced coolers for these cars.
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Old 11-21-2007, 08:00 AM   #10
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Yes, that and some NG/9-3/9-5 top mounts
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Old 11-21-2007, 08:06 AM   #11
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So we need to get rocking on some decent reasonably priced coolers for these cars.
Yes please

I had been planning on going the Forge route in the spring.... but I'll definitely be watching to see what you come up with.
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Old 11-21-2007, 08:12 AM   #12
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Well after looking at the 9-3 exhaust manifolds,I see you guys have other problems that need to be delt with first.This may be the worst exhaust manifold in the history of the automobile.
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Old 11-21-2007, 08:14 AM   #13
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Well after looking at the 9-3 exhaust manifolds,I see you guys have other problems that need to be delt with first.This may be the worst exhaust manifold in the history of the automobile.
Haha, I'm also waiting for that to happen

Thanks for taking care of us, Chuck!
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Old 11-21-2007, 08:16 AM   #14
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There is a hose difference too, the 99 9-3 HOTs came with the T25, wereas the 9-3s with the TD-04 came with well, that turbo. And the hose for the T25 needs to be longer.

Samco makes a hose kit for the Td-04 version, but not the T25.

The Viggen IC is a really cheap upgrade, but the hoses usually triple the cost.
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Old 11-21-2007, 08:20 AM   #15
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There are several options ranging in effectiveness and price for IC's for ng900/9-3...

what would really be something you could have a monopoly on, is a true PLUG AND PLAY bar and plate FMIC kit with pipes, for saab 9-5.

right now all that exists is
A)take your chance on sometimes sketchy ebay core and pipes and fab yourself
B)performance replacement in factory location

some of us aren't as handy as others and would love a nice kit.
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Old 11-21-2007, 08:22 AM   #16
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I think making your own hoses is the best idea, the OEM ones are way unreasonablly priced for what they are.

I would probably be interested in a 9-3 intercooler is the price is right. My 9-3 has the "there and back again" or double pass, or craptastical intercooler since its a low pressure non-T7 car. I'm sure they car would wake up quite a bit with a new intercooler.
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Old 11-21-2007, 08:40 AM   #17
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There are several options ranging in effectiveness and price for IC's for ng900/9-3...

what would really be something you could have a monopoly on, is a true PLUG AND PLAY bar and plate FMIC kit with pipes, for saab 9-5.

right now all that exists is
A)take your chance on sometimes sketchy ebay core and pipes and fab yourself
B)performance replacement in factory location

some of us aren't as handy as others and would love a nice kit.
Here are some plug and play ones I do for the S4s.I also build these for the 1.8t VWs and A4s.

I like to make the coolers to fit the cars instead of cutting up the cars for the cheapest cooler on ebay.I also like to use Bell intercoolers cores whenever possible(and they have alot of sizes of cores).









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Old 11-21-2007, 08:48 AM   #18
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you ever test the pressure drop in those ones for the audi.
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Old 11-21-2007, 09:03 AM   #19
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I like mine better....

Testing has shown that up to about 350bhp, the stock exhaust manifold is not that bad and there was really no difference in the stock manifold and the nice tubular top mount manifold.

The main issue is that you cannot get a decent inlet pipe on the stock ng900 manifold with a larger turbo like my gt3071.

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Old 11-21-2007, 09:17 AM   #20
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I think making your own hoses is the best idea, the OEM ones are way unreasonablly priced for what they are.

I would probably be interested in a 9-3 intercooler is the price is right. My 9-3 has the "there and back again" or double pass, or craptastical intercooler since its a low pressure non-T7 car. I'm sure they car would wake up quite a bit with a new intercooler.
I know someone local who has a pretty cheap used Viggen IC.
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