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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 10-19-2012, 02:17 PM   #1
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Need Cheap-ish Turbo T28<

My T28 cracked its exhaust side, near the radius of the exducer. EGT's and boost were reasonable. Anyway, I am currently SOL and in need of a turbo. I don't have much money, but considering I went the "proper" way and had a reputable builder do the T28, I am not terribly concerned with whether a china charger for $300 craps out in a year--that's longer than my T28, still.
So, I am looking for:
1) Something close-ish to the T28 in SPOOL and overall BHP.
2) Something that uses a T25 flange.
3) It must fit with and A/C equipped car.
4) It must use, more or less, the same lines as the T25. Eg, a BB turbo needs weird reducers and custom lines,
-Cm
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Old 10-19-2012, 04:22 PM   #2
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Wow, Your Turbo shit its self.That's disappointing.

Have you spoke to The G-pop shop or Dave?
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Old 10-19-2012, 07:42 PM   #3
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The yard near me has a turbo still on a 99 9-3 base. I haven't looked for sure but I'm guessing its a t25. Unknow on the condition or mileage. I'll check on it next time I'm out there.
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Old 10-20-2012, 04:15 AM   #4
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There are some cheap td04-19t turbos on ebay with saab housings.
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Old 10-20-2012, 05:58 AM   #5
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Running over 25psi in any journal bearing T25 frame is asking for it.

But I would buy a known good 94-99 NG/9.3 T25, and swap over the comp wheel and machined comp housing. Cheap and easy, I have one for $100 shipped.

Last edited by SAABOOST; 10-20-2012 at 06:01 AM.
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Old 10-20-2012, 01:15 PM   #6
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What about a T04E or something of that flavor...seems to me they are a little higher flowing than the T28.
There are quite a few of the above on ebay for ~$200.
-Cm
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Old 10-20-2012, 10:11 PM   #7
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Here's a China charger with a 1 year warranty...
GT28 GT2870 1 T25 60 A R Comp 64 A R Turbine 180sx s13 CA18DE Turbocharger | eBay

Will it work-hose wise and fitment? I know I need to modify the exhaust but this is of little concern to me.
-Cm
P.S For some reason the TD04 series command a MUCH higher price, even the knock-off's do.
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Last edited by Cm452; 10-20-2012 at 10:16 PM.
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Old 10-22-2012, 06:02 AM   #8
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Originally Posted by SAABOOST View Post
Running over 25psi in any journal bearing T25 frame is asking for it.

But I would buy a known good 94-99 NG/9.3 T25, and swap over the comp wheel and machined comp housing. Cheap and easy, I have one for $100 shipped.
To my knowledge the "Big" T28 (the one I have) has both larger wheels, on the cold AND hot side...this is the advantage over the T25/28 hybrid that most confuse it with and also answers why it puts down more power than the hybrid. Regarding the 25psi comment...why? I have 360* thrust bearings and the gutted housings w/bigger wheels. EGT's are fine.
-Cm
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Old 10-22-2012, 07:07 AM   #9
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Wow, Your Turbo shit its self.That's disappointing.

Have you spoke to The G-pop shop or Dave?
Hopefully it was a one-off problem and our Big T28s will be fine. Let us know what you find for a replacement CM.
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Old 10-22-2012, 10:01 AM   #10
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I am now skittish and if I do get it fixed the fate of FI by T28 is officially up in the air. What about a holset HX27? I was hoping that someone on here could recommend an intermediate step between the Big T28 and balls-out GT3071 or Hx35. The Hx35 is cheap, but spools too late for my tastes, and GT 30 series is a) expensive as hell to buy and install and b) will overload my clutch's capacity by a fair margin. Addendum c) a GT30 series might kill me or end me up in jail.
-Cm
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Old 10-22-2012, 11:22 AM   #11
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Originally Posted by Cm452 View Post
To my knowledge the "Big" T28 (the one I have) has both larger wheels, on the cold AND hot side...this is the advantage over the T25/28 hybrid that most confuse it with and also answers why it puts down more power than the hybrid. Regarding the 25psi comment...why? I have 360* thrust bearings and the gutted housings w/bigger wheels. EGT's are fine.
-Cm
I confused it with the "Hybrid" the 25psi comment doesn't apply nearly as much.

You wanna sell the comp housing & wheel to recoup some $ for the new purchase?
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Old 10-23-2012, 03:45 PM   #12
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Even though I'm not in the business anymore, I just want everyone to know that I'm waiting for information to take to GPop for Chase on this issue.

This is the only issue of it's type reported to me on this unit so I would assume it's an isolated problem. Mine is MUCH older and more abused than Chase's and it's doing just fine. (as are others that we have supplied over the years.)

Hang in there Chase.

-David
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Old 10-24-2012, 10:06 AM   #13
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Even though I'm not in the business anymore, I just want everyone to know that I'm waiting for information to take to GPop for Chase on this issue.

This is the only issue of it's type reported to me on this unit so I would assume it's an isolated problem. Mine is MUCH older and more abused than Chase's and it's doing just fine. (as are others that we have supplied over the years.)

Hang in there Chase.

-David
Thanks David! I did contact Gpop shop, and they said that they will do what they can, but that "the way we see it, it is a problem with a part you supplied us". They asked me to send pictures of the failure so they can decide a course of action from there. The owner of the shop who discovered the problem said that he would personally call Gpop as he has never seen this problem...ever.
I also want to clarify that Gpop shop is not legally bound to anything; the warranty expired. David has been nothing but incredibly helpful from square one and it is a shame that he is no longer in the business.
The car is beached at my parents' house and will have to wait until mid-terms are over. A good friend of mine and fellow Saaber sent me a T25 as a loaner until I get the matter resolved.
In essence; the Saab community rocks
-Cm
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Old 10-24-2012, 02:27 PM   #14
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Thanks David! I did contact Gpop shop, and they said that they will do what they can, but that "the way we see it, it is a problem with a part you supplied us". They asked me to send pictures of the failure so they can decide a course of action from there. The owner of the shop who discovered the problem said that he would personally call Gpop as he has never seen this problem...ever.
I also want to clarify that Gpop shop is not legally bound to anything; the warranty expired. David has been nothing but incredibly helpful from square one and it is a shame that he is no longer in the business.
The car is beached at my parents' house and will have to wait until mid-terms are over. A good friend of mine and fellow Saaber sent me a T25 as a loaner until I get the matter resolved.
In essence; the Saab community rocks
-Cm
Chase,

You are a credit to the SAAB community yourself.

-David
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Old 11-09-2012, 02:23 PM   #15
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Good follow-up there, nice to hear Gpop is alright...

David you are not in business? how sad, I did want to talk to you about my T25 build I am sending it to Gopop like you suggested., I had a few question and was hoping you could help... PM me if possible, thanks
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Old 11-09-2012, 04:15 PM   #16
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Good follow-up there, nice to hear Gpop is alright...

David you are not in business? how sad, I did want to talk to you about my T25 build I am sending it to Gopop like you suggested., I had a few question and was hoping you could help... PM me if possible, thanks
Yep, Gpop is doing just fine.

I sold my business in April and re-joined the corporate world. Honestly, my income is much better for it, so it's all good.

I'm happy to help. I'll PM you.

-David
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Old 11-12-2012, 02:06 PM   #17
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As a heads up; Sandy trashed my parents' place and my Saab missed certain destruction by inches. Because they lost power and water and heat, I have not been down as they stayed in a hotel for the last week.
I am growing increasingly restless over this whole thing because when considering the facts, I am in a losing proposition either way.
Case A) Gpop decides to fix the turbo, (very unlikely, especially as time drags on) and I am out $100 shipping and probably parts, plus new gaskets and banjo washers~$30. I'll stick with the T28 in this case for sure.

Case B) Gpop refuses to repair the turbo under warrantyt (the legally correct move). Now it is $100 shipping and then the ~$400+ to fix it; $500+ on top of the 900+ invested in the turbo already; net ~$1500=Gt30 series

Case C) Scrap the T28 and recoup what I can for parts ($300-400) and invest in a big-boy turbo. I have some idea what options are out there, but the Gt3071, Holset27 or 35, each have downfalls. The Hx35 spools too late. Period. Plus, it needs a special manifold. The Gt30 series are nice and can spool right where I want 'em to, but are expensive as hell. Things to consider:
1)I have the stock viggen clutch&pp. This will probably not hold the above...$$$

2) Ancillary costs and difficulties.
3) My own mortality in a 400 whp fwd car. When it was running right with the T28, I likened the accelerator to those cocaine-drip experiments where rats hit the lever over and over to get a "dose".

The above list seems to point back towards the T28, but, that turbo is in my top 5 lifetime shit-list. Sinking more money into it is not something I am eager to do. The T28 relies on a gutted housing, which means it is just as likely to happen again. Cost vs subjective benefit analysis decides it,as always.
-Cm
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Old 11-12-2012, 03:38 PM   #18
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You could try an hy30. It has a t25 flange and should make similar power and spool as good as the t28
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Old 11-12-2012, 10:01 PM   #19
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You could try an hy30. It has a t25 flange and should make similar power and spool as good as the t28
might as well do an hx25
same t25 flange, but better balanced wheel combo from what ive heard
flow's about the same as the t28 too (30.5lbs/min) so tune wouldnt need much changing
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Old 11-13-2012, 04:08 AM   #20
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The hy30 would be a bit large then, it flows somewhere in the low 40's.
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