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11-27-2013, 03:20 PM | #1 |
Scooby Newbie
Member#: 374582
Join Date: Nov 2013
Chapter/Region:
W. Canada
Location: Spokane Washington
Vehicle:2008 Sti Matte Orange |
How much power you pushing? 20g owners only.
For people with 20g turbos, how much power are you pushing at what psi? And what is your inlet size? Also what supporting mods do you have. Curious to hear.
I will be installing aquamist hfs-3 and running 50/50 meth water with my blouch 20gxt. Hoping to hit around 400whp. Is it possible? Supporting mods: Headers Intake Built short block Port n polish heads Fmic Turbo back exhaust Tgv deletes External wastegate |
11-27-2013, 04:14 PM | #2 |
Scooby Newbie
Member#: 338211
Join Date: Nov 2012
Chapter/Region:
E. Canada
Location: Toronto
Vehicle:2011 wrx cobb 20G |
check out xluben, hees done a ****load of stuff with a 20g turbo on a 2.5. His contributions to the community are insane. I learned a lot from his threads over the past 2 years.
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11-27-2013, 04:28 PM | #3 |
Scooby Newbie
Member#: 374582
Join Date: Nov 2013
Chapter/Region:
W. Canada
Location: Spokane Washington
Vehicle:2008 Sti Matte Orange |
Thank you, just curious about all the others guys here running 20g's if they want to chime in also.
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11-27-2013, 04:57 PM | #4 |
Scooby Newbie
Member#: 338211
Join Date: Nov 2012
Chapter/Region:
E. Canada
Location: Toronto
Vehicle:2011 wrx cobb 20G |
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11-27-2013, 05:31 PM | #5 |
Scooby Guru
Member#: 60082
Join Date: Apr 2004
Chapter/Region:
MWSOC
Location: Minnesota
Vehicle:2004 Forester STI Silver |
It's a 400whp turbo if you're curious. There isn't that much question about that since there's a pile of dyno results in this forum section saying so. I'm not really sure why this thread exists honestly. The data is already there for you in huge quantities. In mere seconds you can confirm or deny which turbo repeatedly hits the 400whp mark over and over with many different cars. The 20G is a good size to just get up to that mark. A GT30 based turbo will also get there and can offer more. This really shouldn't be a surprise. Now you're new to this site, so you haven't had much time to look around, but I do suggest you do. Spend a little time looking through threads, comparing build methods, and seeing results. The answers should become clear.
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11-27-2013, 05:40 PM | #6 | |
Scooby Newbie
Member#: 374582
Join Date: Nov 2013
Chapter/Region:
W. Canada
Location: Spokane Washington
Vehicle:2008 Sti Matte Orange |
Quote:
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11-27-2013, 06:50 PM | #7 | |
Scooby Newbie
Member#: 163631
Join Date: Nov 2007
Chapter/Region:
NWIC
Location: Seattle
Vehicle:07 Forester XT Dom 1.5XT-R |
Quote:
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11-27-2013, 07:31 PM | #8 |
Scooby Newbie
Member#: 374582
Join Date: Nov 2013
Chapter/Region:
W. Canada
Location: Spokane Washington
Vehicle:2008 Sti Matte Orange |
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11-27-2013, 07:38 PM | #9 |
Scooby Specialist
Member#: 323379
Join Date: Jun 2012
Vehicle:1992 Trans Am |
You better learn to get over it here. The %age of helpful people is extremely low. People would rather rag on you for not searching and make a huge stink instead of posting a helpful response. Which is just as easy as being a search douche.
Not to say that you can't find all the info easily by searching and avoiding this crap altogether. This platform isn't new. All your questions have been answered. |
11-27-2013, 10:01 PM | #10 | |
Scooby Guru
Member#: 60082
Join Date: Apr 2004
Chapter/Region:
MWSOC
Location: Minnesota
Vehicle:2004 Forester STI Silver |
Quote:
The reality is pretty simple though. There is no magic. Also, many people making significant power tends to show it off meaning most everyone that will reply and show their amazing dyno graphs and builds will already have a thread made showing exactly that. The information is already here available to you with the click of a few key strokes. This thread is just being lazy. I say this because there is SO MUCH information already there and so many people running and showing off their 20G builds. Yet, despite all that information already shared open to your viewing wonder you make a thread to have said people come to you to repeat the same information with no effort on your part. This is laziness. Now I'd feel different if the data was hard to find, say you asking about some obscure turbo or strang build that no one's ever done or has done but simply has not presented measurable info. A simple example would be supercharger builds. That's pretty rare. That's harder to find and may warrant some input by people, YET that's also already been asked by others and responded by members. That too would be simple repetition of data that already exists. I'm not trying to be cynical here, however a PILE of people run 20Gs and have a sea of 20G builds and dyno results. You starting a thread is a bit redundant and forces other people to respond to you and repeat themselves. The answer for you lies in simple science. A 20G is a 47 lb/min (680 cfm) turbo. On a general level, you're looking at around 1.45 cfm/hp produced, so 680 cfm means about 470hp. Now this is crank hp, so there's some lost through the drivetrain, typically 60-70ish range for hp loss. There are several turbos around this output level as well as higher. They will produce 400whp on Subarus. Yes, there are some supporting mods to allow enough fuel and air flow to actually make it all work, but that's all basic stuff and pretty easy to find by searching. There's tons of threads covering all the key concepts. How about fuel? Typically people just grab the Walbro 255 lpr bump and call it a day. Well how much HP does it support? Well, a lot of people use this pump so a lot of people have tested this pump. Tests indicate it's north of 500chp for any boost level you'll run. There's a pile of information on the internet. Look if you care. What about injectors? Again there's a pile of info online for this including easy to use calculators. 470chp with an 80% duty cycle comes out to around 925cc/min. Depending on the calculator used, this can be higher or lower depending up assumptions the calculator uses. A 1000cc/min injector is a pretty simple buy here and will offer plenty of flow without needing super high duty cycle to achieve it. You could run 850cc/min injectors at 90% duty cycle and achieve similar results. It's just commonly suggested to stay at 80% or below, although you can run higher. Some suggest 90%. Are there any air flow mods? Oh yeah, tons. On a basic sense, once you get up into the 400hp range you do want to start stepping away from the small 2.4" intake. You certainly can't use the stock intake at all at this point, and a high flow 2.4" size starts to become restrictive. A 3" option is advisable but not needed. You will find 20G sized turbos in both sizes, although many will still be 2.4" sized. The 3" size starts to become more common once you're looking at GT30 sized turbos. The intake manifold isn't exactly the highest flowing piece of hardware, but there's not a lot of great alternatives without paying big bucks. There's been flow testing on a variety of option, so look if you have interest. You can also look at head work and cams too if you want, but it's not absolutely needed at 400hp. If you're doing 500-600hp, you really need to look at this. Pre turbo, the exhaust size isn't as big of a deal. Small means fast and can help spool. Upgrades can improve flow though and aid top end hp while sometimes sacrificing low end spool. Mainly you just get rid of the cat in the uppipe and call it a day, but you can certainly do more. You can upgrade the header and uppipe to better products. The bigger part is the rest of the exhaust. The happiest turbo is the one with no exhaust at all, so big is good. 3" is typically, but don't feel bad about oversizing this. Low restriction is typically 115cfm per cubic inch of cross sectional area. This in general is considered "lossless" or of low enough loss that there is low gains for the amount of added cost or weight. Since we're talking a 680 cfm turbo, we're talking a 3" exhaust with nice, mandrel bends, and a high flow muffler that doesn't restrict that kind of flow level. We can certainly up size this some too. Bigger typically means louder though, and there's added weight to the size since it's normally made of steel. The weight's at least low in the car, but it's still a lot of weight. Some opt for titanium, but it's costly. What about other things? A lot of people change the boost controllers. The stock one is kind of slow. There's lots of options like Grimmspeed's EBCS that many run. Some run an affordable GM solenoid: GM boost solenoid for Typhoon, GM Part # 1997152 Pigtails, GM Part # 12102747 Frankly there's tons of options. Tuning is open source, so there isn't anything you need to do for the ECU. Now nothing I've said here is hard to find knowledge. It's all rather quite easy to find in minutes. There's no magic, nothing new, nothing that hasn't already been said or shared. There's a pile of dyno results and build lists for a pile of cars running 20Gs and GT30s that will meet what you seek. They list parts upgraded and straight forward results. It makes it all a pretty easy to put together, fool-proof route for building a car just because so many people have already done it. All you have to do is look. I am being slightly cynical actually but mostly because this is more a results forum section, not a section of inquiry, although it's done from time to time. This is more a "hey, here's my results" section. It's like going to a museum and asking how to paint. Last edited by Back Road Runner; 11-27-2013 at 11:44 PM. |
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11-28-2013, 12:03 AM | #11 | |
Scooby Newbie
Member#: 374582
Join Date: Nov 2013
Chapter/Region:
W. Canada
Location: Spokane Washington
Vehicle:2008 Sti Matte Orange |
Quote:
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11-28-2013, 10:58 AM | #12 | |
Scooby Guru
Member#: 36838
Join Date: May 2003
Chapter/Region:
MAIC
Location: Reston VA
Vehicle:2001 B50 RSTi Sedan 2011 DGM WRX hatch |
Quote:
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11-28-2013, 11:42 AM | #13 | |
Scooby Guru
Member#: 56203
Join Date: Feb 2004
Chapter/Region:
Tri-State
Location: south nj
Vehicle:00 RSTI Coupe Twin Scroll 2.5XTR EJ207 |
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11-27-2013, 05:57 PM | #14 |
Scooby Guru
Member#: 36838
Join Date: May 2003
Chapter/Region:
MAIC
Location: Reston VA
Vehicle:2001 B50 RSTi Sedan 2011 DGM WRX hatch |
A simple search for 20g in this forum yields some 400+hp results:
http://forums.nasioc.com/forums/show....php?t=2226823 http://forums.nasioc.com/forums/show....php?t=1915558 http://forums.nasioc.com/forums/show....php?t=2338819 http://forums.nasioc.com/forums/show....php?t=2188092 http://forums.nasioc.com/forums/show....php?t=2267948 Even lists their supporting mods, answering your questions... The lesser-built threads all show about 380... -- Dave |
11-27-2013, 05:59 PM | #15 |
Scooby Newbie
Member#: 374582
Join Date: Nov 2013
Chapter/Region:
W. Canada
Location: Spokane Washington
Vehicle:2008 Sti Matte Orange |
Thank you, I must be pretty bad at searching or searching key words. But thank you for the links. Very helpful, Dave.
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11-27-2013, 06:08 PM | #16 |
Scooby Guru
Member#: 36838
Join Date: May 2003
Chapter/Region:
MAIC
Location: Reston VA
Vehicle:2001 B50 RSTi Sedan 2011 DGM WRX hatch |
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11-27-2013, 06:22 PM | #17 |
Scooby Newbie
Member#: 374582
Join Date: Nov 2013
Chapter/Region:
W. Canada
Location: Spokane Washington
Vehicle:2008 Sti Matte Orange |
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11-27-2013, 07:25 PM | #18 |
Scooby Newbie
Member#: 338211
Join Date: Nov 2012
Chapter/Region:
E. Canada
Location: Toronto
Vehicle:2011 wrx cobb 20G |
i knew this was gonna happen....honestly dont mind it. typical responses for a pretty general thread.
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11-27-2013, 10:20 PM | #19 |
Scooby Newbie
Member#: 231418
Join Date: Nov 2009
Location: Kennesaw, GA
Vehicle:2006 WRX |
bazinga ^
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11-27-2013, 11:24 PM | #20 |
Scooby Specialist
Member#: 16415
Join Date: Mar 2002
Chapter/Region:
South East
Location: The CLT
Vehicle:02 WRX+1.5XTR+E85= WRBwhatothercoloristhere? |
E85 would greatly help. I know you mentioned the 50/50 Meth but if you have access to E85 it makes it all the easier. I know Cali has some good access to E85.
There is one station in Spokane. (http://www.afdc.energy.gov/fuels/ethanol_locations.html) Grocery Boys 3430 N Crestline Spokane, WA 99207 Also the dyno databases will give you a great idea of some ranges but tuning, mods, and the dyno make a huge difference. Damn the heartbreaker! http://www.cobbtuning.com/Dyno-Database-s/70119.htm To all others who tell a newbie (who joined in November 2013!) not to be lazy& stupid for not using search shame on you for such a poor welcome of new people to the boards. Share your knowledge on how to search rather than rude remarks. It is what I truly hate about this forum. The holier than thou attitude and people wonder why someone snaps back. Answer the man, be helpful, or shut up. |
11-28-2013, 12:05 AM | #21 | |
Scooby Newbie
Member#: 374582
Join Date: Nov 2013
Chapter/Region:
W. Canada
Location: Spokane Washington
Vehicle:2008 Sti Matte Orange |
Quote:
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11-28-2013, 12:33 AM | #22 |
Scooby Guru
Member#: 60082
Join Date: Apr 2004
Chapter/Region:
MWSOC
Location: Minnesota
Vehicle:2004 Forester STI Silver |
You can lead a horse to water...
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11-28-2013, 10:35 AM | #23 |
Scooby Specialist
Member#: 48350
Join Date: Nov 2003
Chapter/Region:
MAIC
Location: Pittsburgh
Vehicle:WRX 03/04/07 hybrid PSM |
Lol wow. You really went out of your way giving solid information and dude ignored it.
Wants to call names at others for giving relevant info, doesnt want to put in the work to really learn anything. These are the same people that believe their 200 dollar home theater system actually puts out 1000 watts of power because it says so on the box. |
11-28-2013, 11:21 AM | #24 |
Scooby Specialist
Member#: 78640
Join Date: Jan 2005
Chapter/Region:
NESIC
Vehicle:19 Tundra 20 Landcruiser | 12 IS-F |
Canadians still use homo as an insult? Probably uses myspace and AOL too.
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11-28-2013, 12:19 PM | #25 |
Scooby Newbie
Member#: 374582
Join Date: Nov 2013
Chapter/Region:
W. Canada
Location: Spokane Washington
Vehicle:2008 Sti Matte Orange |
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