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Old 03-13-2013, 06:29 PM   #1
TyrannosaurusWRX_
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Default To go Twin-Scroll or Not?

I have been saving my money to upgrade my stock turbo on my 2007 STI. I kind of had my heart set on the Blouch 20G-XT which I can find around for maybe $1400.

Then I started reading this thread in the built motor section and came across Kinugawa turbos, and they look like they are the real deal. It seems like with the results that some people achieved with their TD06SL2-20G with a billet wheel, it seems like I can achieve the same goals for a much better value than the Blouch 20G-XT.
http://forums.nasioc.com/forums/show....php?t=2319043

Then I came across this group buy with a great deal on these turbos:
http://forums.nasioc.com/forums/show....php?t=2470483
The Kinugawa TD06SL2-20G with the billet wheel upgrade is $905.

Then I noticed that they also can do the twin-scroll version for close to the same price, which leads me to my question: is twin-scroll worth the investment? It should spool faster and at least make the same power right? I mean, I will have to buy a new header and up-pipe (~$500 from Kinugawa) and modify my downpipe. I have always been jealous of the JDM STIs with the twin scroll setup, so this seems like a good chance.
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Old 03-13-2013, 06:31 PM   #2
25rsti
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Yes they are nice BUT if you're going to have to buy a new manifold, up pipe and downpipe I don't know if it's 'worth it'. BUT, it's your decision.
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Old 03-13-2013, 06:51 PM   #3
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Quote:
Originally Posted by 25rsti View Post
Yes they are nice BUT if you're going to have to buy a new manifold, up pipe and downpipe I don't know if it's 'worth it'. BUT, it's your decision.
It is tempting. Even with having to buy a new header, UP, and DP, it still comes out close to the price I was going to spend on the Blouch 20g-XT anyway.
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Old 03-13-2013, 06:55 PM   #4
25rsti
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Right, but that's not including the turbo or is it including everything with the Kinugawa turbo?
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Old 03-13-2013, 07:23 PM   #5
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figure in the additional cost of extra wastegates as well over singlescroll.
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Old 03-13-2013, 07:26 PM   #6
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No it's not worth it.

If you're going to spend extra money go rotated.
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Old 03-13-2013, 07:43 PM   #7
TyrannosaurusWRX_
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Quote:
Originally Posted by 25rsti View Post
Right, but that's not including the turbo or is it including everything with the Kinugawa turbo?
TD06SL2-20g twin scroll w/ billet wheel upgeade $905 + $50 shipping = $955 with the GB price.
Twin scroll header $499, twin scroll bellmouth $115 + $50-100 welding it on my current down pipe = $664 +$45.50 shipping

$1664.5 is the final price for the twin scroll setup. I think that is everything I need.

Still $1664 > $955 to stay single scroll.
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Old 03-13-2013, 07:44 PM   #8
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Quote:
Originally Posted by spydernooby View Post
figure in the additional cost of extra wastegates as well over singlescroll.
It comes with a waste gate.
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Old 03-13-2013, 07:46 PM   #9
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Quote:
Originally Posted by A-man07 View Post
No it's not worth it.

If you're going to spend extra money go rotated.
It looks like the full twin scroll setup will cost about $1664 shipped. Please direct me to a rotated kit at that price.
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Old 03-13-2013, 07:54 PM   #10
25rsti
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It's really your decision. It's a give and take situation.
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Old 03-13-2013, 10:16 PM   #11
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If you have to ask this question, the answer to you is no as you have obviously done zero research on turbos. No, I'm not being an internet dong....I'm telling you that if you buy a turbo....ANY turbo without researching for over 30 days to include long and thoughtful reads here and with books, that you will buy the wrong turbo. Once your research is carefully performed, you've spoken to your tuner, and you've spoken to your turbo vendor(s) of choice, there is NO REASON to seek help from the internet.
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Old 03-14-2013, 02:05 AM   #12
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Quote:
Originally Posted by Unabomber View Post
If you have to ask this question, the answer to you is no as you have obviously done zero research on turbos. No, I'm not being an internet dong....I'm telling you that if you buy a turbo....ANY turbo without researching for over 30 days to include long and thoughtful reads here and with books, that you will buy the wrong turbo. Once your research is carefully performed, you've spoken to your tuner, and you've spoken to your turbo vendor(s) of choice, there is NO REASON to seek help from the internet.
I have been thinking about this and researching this for a few months now, have talked to a tuner, this is how I came to which turbo will meet my goals.

So yes, you are being a little bit of a:
Quote:
Originally Posted by Unabomber View Post
an internet dong....
There isn't a lot of people out there running twin-scroll setups on their USDM STIs, so I was hoping with this thread someone with experience with this kind of setup could give some actual feedback, but I guess getting trolled is almost as helpful. I still have faith though.
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Old 03-14-2013, 04:36 AM   #13
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2007 STi with twinscroll Blouch 1.5XTR here. JDM twinscroll header/uppipe, TGVless long runner intake manifold, Moore Performance divorced twinscroll downpipe (USDM length), Spearco TMIC, ID1000/Walbro.

Best daily driver setup I've ever run (and I've been doing turbo Subarus since 2001). Instantaneous response and boost recovery. Doesn't even feel turbo charged anymore... more like an eight cylinder. If absolute power output is your goal, go with a rotated. If daily driving is more important, check out the twinscroll setups.
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Old 03-14-2013, 09:40 AM   #14
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You could also get a whole Kinugawa downpipe instead of chopping up the one you have.
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Old 03-14-2013, 10:55 AM   #15
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If you're going to do the manifold anyways and upgrade the turbo at the same time, it would be stupid to NOT do twin scroll. That said, either way I'd rather have Kinugawa than the Blouch. The local subie shop here stopped carrying Blouch after they got a string of turbos with shaft play directly from Blouch that blew within a short time of install and Blouch would not stand behind them, even when the shop pointed out the shaft play to Blouch before installing the turbos.
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Old 03-14-2013, 11:44 AM   #16
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Imo, twin scroll is great for people into racing (not drag, edit: brain fart, depending on trans u might wanr ts for drag, if u can understand) and people who want super fast response on the street(like phleg said) That's all, like una said, do more research.

Last edited by CatfaceType-R; 03-14-2013 at 02:53 PM.
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Old 03-14-2013, 02:22 PM   #17
TyrannosaurusWRX_
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This....

Quote:
Originally Posted by phlegmon View Post
2007 STi with twinscroll Blouch 1.5XTR here. JDM twinscroll header/uppipe, TGVless long runner intake manifold, Moore Performance divorced twinscroll downpipe (USDM length), Spearco TMIC, ID1000/Walbro.

Best daily driver setup I've ever run (and I've been doing turbo Subarus since 2001). Instantaneous response and boost recovery. Doesn't even feel turbo charged anymore... more like an eight cylinder. If absolute power output is your goal, go with a rotated. If daily driving is more important, check out the twinscroll setups.
From what I have read, that is kind of my expectation. I think I am going to take the plunge and go for it.
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Old 03-14-2013, 02:53 PM   #18
25rsti
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Keep us updated. I loved my twinscroll vf37 setup!
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