TWIN TURBO Setup
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TWIN TURBO Setup
Here is the story:
My setup has 2.4 shortblock with 7,6:1 CR , port&polished stg3 wrx heads, Crower stg 3 cams, Valvetrain capable of 9000rpm. APS DR725 FMIC, Oil cooler, ALky injection, 3 inch turboback, external wg,GTspec headers, rotated GT30-11, AEM EMS and a lot of other goodies to support these.
With GT30-11 i have no lag, i get full boost around 3900rpms but of course it doesn't let me to achieve my power goals.
So first i made my mind to go with the mighty GT35R W/ 1,06 hotside, which will for sure let me reach my power goal (600awhp) BUT it would give me a hell of lag. I assume that it would give me full boost around 5200-5400 rpms.
Now the idea is, we thought that with a nice assambled twin turbo setup we can reach 600whp with less lag. I don't have the MAF anymore so the setup will not be much of a problem.
1)Is the theory that twin turbo setup will reach the power with less lag?
2)What turbos shall i go with?
3)What are the + sides and - sides of this setup?
I would be so glad if you guys help which i need now badly.
Caglar
My setup has 2.4 shortblock with 7,6:1 CR , port&polished stg3 wrx heads, Crower stg 3 cams, Valvetrain capable of 9000rpm. APS DR725 FMIC, Oil cooler, ALky injection, 3 inch turboback, external wg,GTspec headers, rotated GT30-11, AEM EMS and a lot of other goodies to support these.
With GT30-11 i have no lag, i get full boost around 3900rpms but of course it doesn't let me to achieve my power goals.
So first i made my mind to go with the mighty GT35R W/ 1,06 hotside, which will for sure let me reach my power goal (600awhp) BUT it would give me a hell of lag. I assume that it would give me full boost around 5200-5400 rpms.
Now the idea is, we thought that with a nice assambled twin turbo setup we can reach 600whp with less lag. I don't have the MAF anymore so the setup will not be much of a problem.
1)Is the theory that twin turbo setup will reach the power with less lag?
2)What turbos shall i go with?
3)What are the + sides and - sides of this setup?
I would be so glad if you guys help which i need now badly.
Caglar
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Car Info: 1993/2000/2001 GF4 mostly red
Twin turbos won't really help with lag in a high-hirsepower setup. You still have to balance size and responsiveness with capacity and maximum power.
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From: SBAIC-South BayArea Impreza Club-Campbell, CA-Thur
Car Info: 2003 PSM STi
Just go get a big ole Twin Scroll Turbo. Thats what I'd do
-Ted
edit: There are actually two different ways you can setup a Twin Turbo system....a Sequential TT which is meant to reduce lag via, one "small" turbo, and one "big" turbo....the small turbo spools quick for low end, when it runs out of its efficiency range, the wastegate opens and the Big Turbo takes over from there.
Then there is your standard TT which is basically one turbo for each cylinder bank, so to speak. They boost together in a combined effort to send you off into hyper space, approaching the never before reached....."Rediculous speed! " <think Spaceballs>
-Ted
edit: There are actually two different ways you can setup a Twin Turbo system....a Sequential TT which is meant to reduce lag via, one "small" turbo, and one "big" turbo....the small turbo spools quick for low end, when it runs out of its efficiency range, the wastegate opens and the Big Turbo takes over from there.
Then there is your standard TT which is basically one turbo for each cylinder bank, so to speak. They boost together in a combined effort to send you off into hyper space, approaching the never before reached....."Rediculous speed! " <think Spaceballs>
Last edited by GotBoost?; May 13, 2005 at 12:22 AM.
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i was just about to bring up the sequential twin turbo setup, bastard beat me to it ;D, but yea even with this setup, you will still have considerable lag to just running one turbo. It also depends on how you mount the kit, and since there's no twin turbo kit for the wrx out there right now you'd have to do it custom. So when you make the kit, do it with the least amount of piping. If you goal is 600+awhp, what are u gonna do with it? drag, track, auto-x, rally? a gt-35R is pretty good even with that lag for drag, and with your valvetrain capable of 9k redline, i think you'd be more than happy with it. just my 2 cents
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the purpose is drag. I'll be attending to the King Of Europe drag challange. www.kingofeurope.net
There will be some sick cars and i need to reach 600whp if in order to make some success.
On the other hand, the car is my daily drive. I know i want too much
There will be some sick cars and i need to reach 600whp if in order to make some success.
On the other hand, the car is my daily drive. I know i want too much
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From: SBAIC-South BayArea Impreza Club-Campbell, CA-Thur
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I would look into the GT32 TwinScroll turbo w 51lb/min compressor wheel.....I would forget a TT setup....the amount of work it would take in order to get it working would be tremendous....even then, I have heard about people having major tuning problems with a TT setup on a Scoob, unless you are going with a totally aftermarket custom Engine management solution.
-Ted
-Ted
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Posts: 302
From: bah
Car Info: POS
Check out some threads over at NASIOC:
http://forums.nasioc.com/forums/show...5&page=6&pp=25
TWR is making a 3.3L SVX twin turbo motor in a GD chassis
Switzer also has a TT SVX motor in GD chassis:
http://www.switzerperformanceinnovation.com/
They posted pictures on the NASIOC thread above.
Good luck with your project. Have you checked out the Twin-Charged STi :
https://www.i-club.com/forums/showth...3&page=1&pp=20
With any of these type of setups price will be fairly high. Lots of custom fabrication and custum EM, but you will have something different and if done right some thing with great performance. If you got the money get a 3.0L or 3.3L motor and TT it, then you can keep up with a 911 TT
http://forums.nasioc.com/forums/show...5&page=6&pp=25
TWR is making a 3.3L SVX twin turbo motor in a GD chassis
Switzer also has a TT SVX motor in GD chassis:
http://www.switzerperformanceinnovation.com/
They posted pictures on the NASIOC thread above.
Good luck with your project. Have you checked out the Twin-Charged STi :
https://www.i-club.com/forums/showth...3&page=1&pp=20
With any of these type of setups price will be fairly high. Lots of custom fabrication and custum EM, but you will have something different and if done right some thing with great performance. If you got the money get a 3.0L or 3.3L motor and TT it, then you can keep up with a 911 TT
Last edited by silentbob343; May 15, 2005 at 07:25 AM.
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From: Bethlum, PA
Car Info: silver 2.5 tr 2006MT wrx
Check out some threads over at NASIOC:
http://forums.nasioc.com/forums/sho...35&page=6&pp=25
i always wondered could you put the 6 legacy engine in the impreza?
now i know that is awesome. 3.4 liter, that has to crush other cars whem they do not know what is in it.
http://forums.nasioc.com/forums/sho...35&page=6&pp=25
i always wondered could you put the 6 legacy engine in the impreza?
now i know that is awesome. 3.4 liter, that has to crush other cars whem they do not know what is in it.
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Posts: 555
From: Bethlum, PA
Car Info: silver 2.5 tr 2006MT wrx
it is the same size, so i could pop mine out and drop that one in? there has to be more to it then that. but it would be cool if it just dropped in, you could take time building that up while keeping the other one in your car. and spend a saturday putting it in.
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The main issue would be packaging the exhaust manifold to run a single turbo, the intercooler, accesories, and cooling capacity. Certainly doable though.
