td04-15t 5cm to 18t? - The Saab Link Forums

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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 09-20-2011, 10:44 PM   #1
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td04-15t 5cm to 18t?

does anyone have info on machining the intake housing for the bigger wheel?


also if i buy a balanced turbine will i have to balance it after the rebuild?
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Old 09-21-2011, 05:01 AM   #2
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Don't do it, you need to get the 6cm housing from a 9000 & mod that for the 18t. Most people/tuners state the 18t doesn't work properly with the 5cm housing, to restrictive.... to much heat.

I forget the years the 6cm housings came on 9000's..... go that route, it's what I did & it's a great combo
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Old 09-21-2011, 05:40 AM   #3
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Quote:
Originally Posted by gm View Post
Don't do it, you need to get the 6cm housing from a 9000 & mod that for the 18t. Most people/tuners state the 18t doesn't work properly with the 5cm housing, to restrictive.... to much heat.

I forget the years the 6cm housings came on 9000's..... go that route, it's what I did & it's a great combo
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Old 09-21-2011, 10:37 AM   #4
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Quote:
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Don't do it, you need to get the 6cm housing from a 9000 & mod that for the 18t. Most people/tuners state the 18t doesn't work properly with the 5cm housing, to restrictive.... to much heat.

I forget the years the 6cm housings came on 9000's..... go that route, it's what I did & it's a great combo
i keep hearing that too. but i guess theres guys runing the 18t with 5cm and they say the egts are fine.

i wonder if i clipped the exhaust turbine if it would act like a 6cm unclipped? to lower egts?

i want my saab to have low end power. breaths enough up top right now for me.
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Old 09-21-2011, 10:53 AM   #5
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Yea, it can work..... with a 2.0T I am sure there is a lot more room to play since the pistons are stronger then what is in my Viggen.

In addition to added heat it will also spool up slower vs a 6cm
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Old 07-13-2014, 08:48 AM   #6
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So on a 2.0L, clipped wheels/exhaust side work on the 5 cm housing is ok...but on a 2.3L, it is not. Is this correct? In other words, NO 5 cm housing, regardless of what is done to modify it and the wheels, will function well with the 18T wheel...that is on a 2.3L?
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Old 07-13-2014, 09:44 AM   #7
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you definitely would not want to upgrade to an 18t without going to at least a 6cm turbine housing. Lots of guys are even going with the 7cm housings now.

My 18t in unclipped, which helps a bit with low end spool. If I spent a lot of time in the upper RPM's then clipping the wheel would be great to help keep EGT's down, but that's not a concern of mine.
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