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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 09-20-2007, 04:27 PM   #1
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WANTED: more tranni braking power

well i've been looking around lately and i'm getting really interested in the BIGT28 upgrade. I have read alot about it on DSM forums, even though there set up is mounting a mitsu. exhaust housing, but i was reading about adding the housing off of the evo turbo on it 6G i think. Would this set up be better if i could get it done? they said that it could flow slighty better.
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Old 09-20-2007, 04:31 PM   #2
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16G is prolly what you are thinking of and it is a nice turbo setup good for about 300hp maybe a lil more. But you can order the big t28 from Jak Stoll or any of the turbo rebuilding companies like blousch or g pop shop and have the same power without havign to change manifolds.
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Old 09-20-2007, 04:35 PM   #3
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what the difference between 16G on the T28 setup and just the regular BigT28? they talked about flow at a certain point being better and i think boost spikes on the BigT28 setup said one person?
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Old 09-20-2007, 06:12 PM   #4
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turn the AC on!!!!
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Old 09-20-2007, 07:45 PM   #5
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I had my turbo rebuilt by blouch and a 16G wheel put on. I actually sort of regret it but that is mainly because of the mismatched exhaust housing on my c900. In the end I felt I should have gotten a larger turbo since I went to the hassle and expense to take it out and get it rebuilt. But its personal preference I guess but if you are going to the trouble of getting a 6cm housing you might as go to the 18 or 19.
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Old 09-20-2007, 11:13 PM   #6
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Anyone know how much Jak's T28s run for?
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Old 09-21-2007, 04:05 AM   #7
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Anyone know how much Jak's T28s run for?
no idea but i'd say the same as his special T25 800+200 core charge.
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Old 09-21-2007, 04:43 AM   #8
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Wouldn't it be more than that?
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Old 09-21-2007, 04:48 AM   #9
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Wouldn't it be more than that?
i wouldn't think so cause 800ish+core charge is the going rate from turbo places.
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Old 09-21-2007, 05:49 AM   #10
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If i do this setup i'm going to ask jak to give me a crazy tune and see what i can get for #'s.
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Old 09-21-2007, 05:52 AM   #11
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see if he can give it a 8k rev limit or something similarly crazy
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Old 09-21-2007, 06:04 AM   #12
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see if he can give it a 8k rev limit or something similarly crazy
i wonder what i can rev to until the bigT28 can't flow anymore?
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Old 09-21-2007, 01:38 PM   #13
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If i do this setup i'm going to ask jak to give me a crazy tune and see what i can get for #'s.
I had the big t28, got 318whp and 356wtrq sae in denver. Cut the #'s in half as the NHRA recommends and that would be around 294whp and 340wtrq.

Check it...
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Old 09-21-2007, 02:06 PM   #14
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I had the big t28, got 318whp and 356wtrq sae in denver. Cut the #'s in half as the NHRA recommends and that would be around 294whp and 340wtrq.

Check it...
Yeah, I'm actually still out to get your old one, John. Been talking with Ben for a little while now, nice guy, he's got a quote to get it fixed for about 375.
294whp and 340wtrq would seem like the stopping point for me. Then again, I bet as you were closing your hood you thought the same thing. Look at you know - GT3076, was it?
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Old 09-22-2007, 07:15 AM   #15
 
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I had my turbo rebuilt by blouch and a 16G wheel put on. I actually sort of regret it but that is mainly because of the mismatched exhaust housing on my c900. In the end I felt I should have gotten a larger turbo since I went to the hassle and expense to take it out and get it rebuilt. But its personal preference I guess but if you are going to the trouble of getting a 6cm housing you might as go to the 18 or 19.
+1 .... A very valid point....

Making incremental changes at that point really isn't worth it. My first turbo swap was to a Mitsu 16T, and while it was nice, I immediately wanted more. I ended up spending as much to get the turbo to fit as I would have spent on the GT30 I eventually got...

An 18 on a 2.0L is a nice combo...
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Old 09-22-2007, 07:59 AM   #16
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^^^^ +2...... I went with the 18T and it took all of about 2 weeks before I wanted more. BUT, I have a viggen and there is only so far you can go with the internals. I have a pretty safe tune as well from sqr.
What ever you do, really think about it. SQR was coming to town and I went with what would be the fastest and easiest swap based on time restraints. If I had more time I would have gone with a bigger turbo, and had them tune it down (if that is really possible).
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Old 09-22-2007, 09:51 AM   #17
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Shoot yea, my gt3071 on base boost was like a stage 3 all out with t25...

They can be run de-tuned and then you have the potential to go up if you ever want to in the future...

John
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Old 09-22-2007, 11:27 AM   #18
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do you think the GT28xx would give me more power and a better powerband? Can't bolt one up without any modifications other then the DP?
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Old 09-22-2007, 05:00 PM   #19
 
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GT3071R/.64

Quick enough spool with a 2.0L, but more than enough room for expansion if you ever decide to do a 2.3L

or...just do a Holset HX35/40...slightly more lag with the 2.0, but BIG top end....
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