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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 10-28-2007, 10:10 AM   #1
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Twin turbo

JUST AND IDEA
So say you have two t25 (alot of time) and a aboundence of $$$
ok so you make a custom top mount manifold for 2 turbos (split the exhaust gas in 2) make a custom downpipe and cold air intake. and a larger fuel pump

ok so i image it would do full boost and 4000rpms and keep pulling up to 8000rpms(enem cams and valve spring)

any constructive criticism out there

(granted i am problly going to do a big t28 on my car)
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Old 10-28-2007, 10:19 AM   #2
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waste of time and money. spend it on a big gt ball bearing turbo and a good tune, and your money will be much better spent.
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Old 10-28-2007, 10:22 AM   #3
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T25 would run well out of steam by 5000 rpm even if you had it running in a dual setup.

Then again have some fun and go build one up and lets see something new and interesting. Bring it to all the conventions and show it off.



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Old 10-28-2007, 10:26 AM   #4
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Originally Posted by StX221 View Post
waste of time and money. spend it on a big gt ball bearing turbo and a good tune, and your money will be much better spent.
plz explain why
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Old 10-28-2007, 10:42 AM   #5
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you will spend lots, not be able to make much power off those t25's.

dont forget that making big power has to do mostly with the volume of air that you move, not so much the pressure. a t25 is just too small to really make power. plus, you would have to spend waaaay too much in fab work to make it worth it, especially when you can basically bolt on a gt30 with a simple manifold spacer for less than 100 bucks...

you would be better off with a gt30xx and a serious tune. push 30+ psi and you into the seat!
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Old 10-28-2007, 10:50 AM   #6
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Quote:
Originally Posted by StX221 View Post
you will spend lots, not be able to make much power off those t25's.

dont forget that making big power has to do mostly with the volume of air that you move, not so much the pressure. a t25 is just too small to really make power. plus, you would have to spend waaaay too much in fab work to make it worth it, especially when you can basically bolt on a gt30 with a simple manifold spacer for less than 100 bucks...

you would be better off with a gt30xx and a serious tune. push 30+ psi and you into the seat!
ok we will switch to t28 should pull off 6000rpms
and i can most of the custom fab work i know people( i have a 3rd job exhaust shop)
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Old 10-28-2007, 10:55 AM   #7
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This topic has been discussed many times before please use the search.
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