08-10 SS Turbocharged General Discussion Discuss the 2008 - 2009 Chevy Cobalt SS Turbocharged. On sale since the second quarter of 2008.

Bnr k04-gt28

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Old 01-21-2011, 01:59 PM
  #701  
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Originally Posted by BYT*SS*TURBO
With a combo tune right? Def takes some logging back and forth as you saw. I think yours is Terms first combo? I could be wrong there but its a bit different then HP alone. He knows very well how the DAL and MAL tables work so he'll get it!
It was not hitting 30 psi before on that same tune LOL. I think a lot of it has to to with the cam timing chain being off a link or two. His DALs are actually pretty conservative compared to RYRIDESMOTOX and Drewbroos cars and they are all hitting 24-25 psi. Once he gets the ported head on and the timing chain reset I will relog and retune it anyway.
Old 01-21-2011, 02:02 PM
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Originally Posted by Iam Broke
Duly noted, thanks Matt. I thought VE airflow was calculated via the pressure drop across the throttle body.
It is. But VE calcualtion also takes a few other measurements, MAP for one into account.
Old 01-21-2011, 02:22 PM
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Originally Posted by BYT*SS*TURBO
We got it pretty squared away boost wise now. So time to start working on making some power with it
W00t!!!!

Originally Posted by FF_ace
ya no problem i really cant do much data logging on my car until i get the timing chain fixed and i will do that when i install my ported head which should be done here soon. i have to get my boost under control as well im seeing it spike to 30
read lots of interesting things about a ported head destroying the tuneability of it..

Just sayin..

Last edited by PrincessTurbo; 01-21-2011 at 02:22 PM. Reason: Automerged Doublepost
Old 01-22-2011, 09:00 PM
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No update at all today, I was expecting some news this evening, its the weekend
Old 01-22-2011, 09:22 PM
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updates?
Old 01-22-2011, 09:58 PM
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Sent a file and update back and forth so far today. Nothing major yet.
Old 01-22-2011, 10:36 PM
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Originally Posted by BYT*SS*TURBO
Sent a file and update back and forth so far today. Nothing major yet.
sounds good glad to know you guys are working on it....how long do you think it is going to take before you guys can start dialing it in?
Old 01-22-2011, 10:58 PM
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WTF!! i cant beleive i just came across this! Where have i been?? lol! Was gonna buy some Stance coilovers but now im leaning tward getting the stage 1! lol!
Old 01-22-2011, 11:38 PM
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The boost is holding flat at about 23psi now. I sent him an update with some more timing in it now and a hair leaner. We'll see how that runs. The 91 there sucks!
Old 01-23-2011, 01:27 AM
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91... Go 94 pump gas
Old 01-23-2011, 06:04 AM
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With just vince right now i at 24psi holding till redline. Took it out tonight had some fun. It pulls real good! It almost feels like my old setup lol. I hooked in second for the frist time in a long time and it felt real good. Might of been due to spinning the hell out of first and heating up the tires.

Originally Posted by BYT*SS*TURBO
The boost is holding flat at about 23psi now. I sent him an update with some more timing in it now and a hair leaner. We'll see how that runs. The 91 there sucks!
Are u guys going to try e85 in the car?

Last edited by turbo_chevy_cobalt; 01-23-2011 at 06:04 AM. Reason: Automerged Doublepost
Old 01-23-2011, 07:24 AM
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SO, I'm reading and watching this thread for a long time. Am I wrong in assuming that this is not going well? I was thinking it would be the same a throwing on a bigger turbo then retuning it and bam more power....I'm sure I'm wrong...
Old 01-23-2011, 08:52 AM
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The best we have out in az is 91. mike yes tyler is going to be running ae85 mix
Old 01-23-2011, 09:06 AM
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Its going just fine, this is the first tune for this turbo so it takes a lil initial setup. We have that part pretty well covered now tho.

Def excited to move onto the E blend, can't really press it hard with the 91, its just not liking it.
Old 01-23-2011, 09:18 AM
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HHmmm thats weird, the regular turbo does great, but then again I'm running93 down here. I wonder why it's doing that. Other turbo kits don't seem to have that problem.
Old 01-23-2011, 09:29 AM
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What problem? Who is saying there is a problem? lol...
Old 01-23-2011, 10:17 AM
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There's no problem we just have shitty gas out here in az that's why most of us are running straight e85 (LSJ) or a mix (LNF)
Old 01-23-2011, 11:41 AM
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Originally Posted by FF_ace
The best we have out in az is 91. mike yes tyler is going to be running ae85 mix
With something with the flow of a GT2871, are we on the borderline of running out of injection window for even 50/50 E85/91 mixes even with the HPFP dialed up to 2800psi?

Word on the street is that Vince is looking for a way to be able to shift the whole injection event forward in time when needed, creating a larger injection window, and allowing pure LNF E85 compatibility without "peeing on the fire". lol
Old 01-23-2011, 12:25 PM
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I think even just with 91 with this turbo we will have a real good power band all the way to redline. With the runs I did last night it better power band then the reg gt2871 on the lower end.
Old 01-23-2011, 12:29 PM
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Originally Posted by FF_ace
The best we have out in az is 91. mike yes tyler is going to be running ae85 mix
I wanting to wait till u guys are done tuning with the car to see how it goes with e85 before I do the duel tune. I sure this setup can be real close or over 400 by a little with the mix.
Old 01-23-2011, 12:35 PM
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I wonder if the new Garret GTX series wheels will fit in our turbos? Im not sure if they were made in the 28 tho?
Old 01-23-2011, 12:46 PM
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Originally Posted by Turbo'dSS
I wonder if the new Garret GTX series wheels will fit in our turbos? Im not sure if they were made in the 28 tho?
i think they're only larger frame turbos.. gt30r + turbos ( not that a gt30 is even that big but you get the point lol)
Old 01-23-2011, 12:51 PM
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Originally Posted by elecblue06
i think they're only larger frame turbos.. gt30r + turbos ( not that a gt30 is even that big but you get the point lol)
yep i get the point! lol. and yeah thats what i was thinking too.
Old 01-23-2011, 05:07 PM
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Tglems got on it while we wereon the freeway and holy ****.it's sounds so knarly and it's a fukn rocket.my car won't stand a chance against him(even with him at 3/4 throttle)lol.very very impressive for not being on E and not completely dialed in
Old 01-23-2011, 06:52 PM
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^^^ Good news


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