2.0L LNF Performance Tech 260hp and 260 lb-ft of torque Turbocharged tuner version.

Cobalt SS: Project 25G

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Old Apr 24, 2013 | 10:52 PM
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Cobalt SS: Project 25G

Sup guys, as some of you may know my last big turbo blew. Here is my last build thread you can follow it here: https://www.cobaltss.net/forums/2-0l...ct-efr-282881/

This is my new setup I have ready for testing by my tuner. This is a custom turbo, I might get some things wrong but here it goes. It is a td06 compressor housing with a 3" inlet and a 2" outlet. The compressor wheel size is Inducer 60.5mm exducer 78mm. It is pretty much comparable to a Gt35r. The compressor wheel size of my EFR is 53.9mm inducer and 67mm exducer. The new turbo is significantly bigger, and most likely will have much more noticeable lag as well.

Anyways, I think we can hit 500whp with this turbo on 100/e85 mix. The thing is I need fuel now to aid this larger turbo. I'm going to dyno on 91 octane at 20 psi, see if I can hit 400whp as a DD. Then tune/dyno for racegas etc when the weather cools down a bit.

The install will be this Saturday. Hopefully the install will be smooth and easy without any issues. Now it's time to show off some pictures





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Old Apr 24, 2013 | 11:33 PM
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power band from 4500-7000???
cant wait to see the results
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Old Apr 24, 2013 | 11:35 PM
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Originally Posted by AARON-SS-TC
power band from 4500-7000???
cant wait to see the results
Ehh, maybe 4200. James said he had made some new cam tables for me to try out so we can get better spool. I'll only rev to 6500, I'm on stock head still.
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Old Apr 25, 2013 | 09:12 AM
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Originally Posted by Fastgti69
Ehh, maybe 4200. James said he had made some new cam tables for me to try out so we can get better spool. I'll only rev to 6500, I'm on stock head still.
A S20G hits full spool at 4300-4400 or so. This one is larger and based on the same architecture so will lag more. 6500 Redline will mean a very short powerband on this setup (~1900 RPMs). You really need to get valvesprings so you can rev to 7500 or higher to take advantage of this turbos full potential.

Next what the hell happened to your EFR?

Last edited by Terminator2; Apr 25, 2013 at 10:17 AM.
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Old Apr 25, 2013 | 09:20 AM
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That's one big ****! Lol hope everything goes well bro.
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Old Apr 25, 2013 | 10:43 AM
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It will make good power but good god would it be gutless under the curve and for DD.
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Old Apr 25, 2013 | 11:05 AM
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Originally Posted by Terminator2
A S20G hits full spool at 4300-4400 or so. This one is larger and based on the same architecture so will lag more. 6500 Redline will mean a very short powerband on this setup (~1900 RPMs). You really need to get valvesprings so you can rev to 7500 or higher to take advantage of this turbos full potential.

Next what the hell happened to your EFR?
Ahh I know, I've heard. This is for testing purposes to see how well we can get this size of a turbo to spool on a stock motor/head. I'll be doing cams/valvesprigns and a motor build soon. My EFR blew about 2 months ago. I'll take some pics and videos when I pull it out this saturday to see what exactly happened.

Originally Posted by Cobra2255
That's one big ****! Lol hope everything goes well bro.
Thanks bro

Originally Posted by Dart_SI
It will make good power but good god would it be gutless under the curve and for DD.
Yea, I'm not worried about the power as much as the drive-ability . I'm hoping it wont be that bad but we will see. This is not going to be my final set up. This is just for testing and tuning purposes. I'm a little behind on cash so James has offered to help me out for now by sending me this. When I have more money, I'll go back to another EFR most likely. I'm looking to go larger than a 6758.
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Old Apr 26, 2013 | 01:24 AM
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Crap maybe I should add what I have on right now too LOL.

My current mod list is a (blown) 6758 EFR, TTR intake manifold, Badmab 3" catless downpipe stock resonator no muffler straight piped, KN Short ram intake, CX racing intercooler, Ky stage 3 clutch, ZZP front and rear transmission mounts, CM springs. Nitto Nt05 245/40/18 up front.

The parts I am adding/changing are the new custom 25g turbo, OTTP Cold and Hot charge pipes with HKS SSQV 3. ZZP Lower charge pipes and MAF relocate kit.
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Old Apr 26, 2013 | 10:52 AM
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Hope you do what we talked about for fuel
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Old Apr 26, 2013 | 07:01 PM
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Originally Posted by ATLsilverSS
Hope you do what we talked about for fuel
Shhhh, nobody can know. It's gonna be a secret!
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Old Apr 26, 2013 | 07:08 PM
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what's the efr doing? Not making boost, smoking , crazy noises? Lol
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Old Apr 26, 2013 | 07:09 PM
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good luck man, glad to see some mitsubishi turbo love on the forum. I love my 20g and I believe my turbo is spooling much faster than the 4300 it did on the dyno. I did a rebuild and the car is just incredible. Cant wait for your results. 400whp daily driven is addicting, I try to stay civil on back roads because of cops but on the highway I cant keep my foot out of the pedal, its fast.
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Old Apr 26, 2013 | 07:15 PM
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i am sorry but what you read on a dyno is nothing like what you feel in the car, its so easy to pass on a turbo based on numbers but the 20g is making 400 from 4500-7500 all day before a rebuild. Thats a lot of room under the curve and your still making over 300hp/300tq at 4100.

are you td06 on both sides?

Last edited by c130aviator; Apr 26, 2013 at 07:15 PM. Reason: Automerged Doublepost
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Old Apr 26, 2013 | 07:26 PM
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Pumped to see these results!
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Old Apr 26, 2013 | 07:45 PM
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Originally Posted by donkeyballs
what's the efr doing? Not making boost, smoking , crazy noises? Lol
LOL, the EFR is kicking it. When I start her up it's like a normal car. No smoke, no crazy noises, just no boost. Tomorrow it's coming out so we'll see whats going on with it.

Originally Posted by c130aviator
good luck man, glad to see some mitsubishi turbo love on the forum. I love my 20g and I believe my turbo is spooling much faster than the 4300 it did on the dyno. I did a rebuild and the car is just incredible. Cant wait for your results. 400whp daily driven is addicting, I try to stay civil on back roads because of cops but on the highway I cant keep my foot out of the pedal, its fast.
Originally Posted by c130aviator
i am sorry but what you read on a dyno is nothing like what you feel in the car, its so easy to pass on a turbo based on numbers but the 20g is making 400 from 4500-7500 all day before a rebuild. Thats a lot of room under the curve and your still making over 300hp/300tq at 4100.

are you td06 on both sides?
Thanks bro, I'm excited to see how it is for myself and this is even bigger than your 20g . Your results make me happy, there aren't many ppl here running these so yea. It's a Hahn s20g kit with a td06 compressor housing and a CHRA swap. The compressor sizing is 60.5mm inducer and 78mm exducer. The exhaust turbine was machined and it is fitted with a 53mm/68mm exhaust turbine.

Originally Posted by Wert842
Pumped to see these results!
Me too brotha, I can't wait!
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Old Apr 26, 2013 | 07:50 PM
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Originally Posted by Fastgti69
Thanks bro, I'm excited to see how it is for myself and this is even bigger than your 20g . Your results make me happy, there aren't many ppl here running these so yea. It's a Hahn s20g kit with a td06 compressor housing and a CHRA swap. The compressor sizing is 60.5mm inducer and 78mm exducer. The exhaust turbine was machined and it is fitted with a 53mm/68mm exhaust turbine.
NICE! FRANKENTURBO that smaller hot side should allow the spool to come on quicker. Very unique.
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Old Apr 26, 2013 | 07:53 PM
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i too have a td06 compressor by the way smartarse but you have 25g wheel should flow a good bit more.
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Old Apr 26, 2013 | 08:59 PM
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^^Hey c130aviator, I'm sure I just missed it somewhere, but what ever ended up being the issue you were having with the turbo not boosting?

sorry for the thread jack btw. I promise it will be a quick one Fastgti..
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Old Apr 26, 2013 | 09:32 PM
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Originally Posted by c130aviator
i too have a td06 compressor by the way smartarse but you have 25g wheel should flow a good bit more.
Really? I'm not too familiar with these setups. I thought it would be different compressor housing too. I guess it's only the inlet that is different but the housing is the same?

Originally Posted by 09CobaltSS1
^^Hey c130aviator, I'm sure I just missed it somewhere, but what ever ended up being the issue you were having with the turbo not boosting?

sorry for the thread jack btw. I promise it will be a quick one Fastgti..
No worries man, I want to know so I would know if that happens to me.
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Old Apr 27, 2013 | 11:58 AM
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Install is today! Wish me luck guys, I hope it goes smooth and easy!
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Old Apr 27, 2013 | 12:37 PM
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good luck. post vids on the street so i can imagine myself driving it lmao
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Old Apr 27, 2013 | 12:40 PM
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Originally Posted by Twoozofjuice
good luck. post vids on the street so i can imagine myself driving it lmao
Definitely man, will do!

For now, you can look at my old EFR videos and imagine that. It's still a big turbo and got me over 400whp/wtq. Enjoy!

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Old Apr 27, 2013 | 12:44 PM
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I'd be dead if we had streets like those here lol
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Old Apr 27, 2013 | 02:53 PM
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Im gonna miss those canyon runs.......fastgti we MUST do a canyon run before I leave ..plan for it in June
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Old Apr 27, 2013 | 02:57 PM
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I bet the efr is fine.. It's prob something else causing it.
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