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

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Old May 9, 2011 | 12:55 PM
  #1676  
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As I stated earlier, cam timing will be everything up there. Not going to tell you which way, you can figure that part out
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Old May 9, 2011 | 01:13 PM
  #1677  
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The gen coupe in those pictures is drool worthy
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Old May 9, 2011 | 01:15 PM
  #1678  
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Originally Posted by BYT*SS*TURBO
As I stated earlier, cam timing will be everything up there. Not going to tell you which way, you can figure that part out
Well I cannot be there to dyno tune it LOL, so a little more street tuning is in order. I have an idea I want to try first before I even bother cam tuning it. Have you ever noticed the limited nature of the WG DC on the stage 1 tunes even when you crank them to 100% desired duty cycle they do not hit 100% normally? It is turbo overspeed protection that is built in that we cannot yet remove. Normally with the stock turbo who cares because it is not efficient at 26 psi at 6K RPMs but on a larger turbo it should matter a lot more. The other regular files have no such turbo overspeed protection because it was not needed with the 15psi regular stock tunes. I have a Frankenstein file in my car that is an 09 regular file with the scaling for the 3 bar maps and I have noticed I can hold ~30% more airload up top on the stock turbo also overall the airload curve which mimics the torque curve is much flatter than it normally looks with my modded stage 1 file.
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Old May 9, 2011 | 01:21 PM
  #1679  
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I have no problem making and holding 100% WGDC on either OS. Im running a GMS1 OS now with stock MAP values to just compare notes, I haven't noticed anything that matters yet tho.

The DAL limiting to 255 in that one table worries me but it doesn't seem to have any problem disregarding that table too. So who knows lol.
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Old May 9, 2011 | 01:35 PM
  #1680  
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Originally Posted by BYT*SS*TURBO
I have no problem making and holding 100% WGDC on either OS. Im running a GMS1 OS now with stock MAP values to just compare notes, I haven't noticed anything that matters yet tho.

The DAL limiting to 255 in that one table worries me but it doesn't seem to have any problem disregarding that table too. So who knows lol.
Weird my car and Drew"s both hit only ~80% in the midrange when I max the DC tables out to 100%. But with the same WG settings in that regular 09 file it holds 100% flat the whole time.
[IMG] Uploaded with ImageShack.us[/IMG]

I have the desired DC set to 100% the whole time it just will not see it as for the airload limits I have his car set at 275% DAL but it does not ever go above 255% DAL.
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Old May 9, 2011 | 01:36 PM
  #1681  
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I want some friggin cam tables...
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Old May 9, 2011 | 01:44 PM
  #1682  
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I will tell you that I moved BOTH the Exh and Int cam tables, not just one or the other.
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Old May 9, 2011 | 01:58 PM
  #1683  
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Originally Posted by BYT*SS*TURBO
I will tell you that I moved BOTH the Exh and Int cam tables, not just one or the other.
got it
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Old May 9, 2011 | 02:20 PM
  #1684  
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Originally Posted by drewbroo
I want some friggin cam tables...
I already have some cam changes to try but first we will see what that Frankenstein file does for your car. It raised My VE airflow 2-3lbs min on the stock turbo if it does the same on yours you will see 39-40lbs/min VE.
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Old May 9, 2011 | 02:33 PM
  #1685  
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Originally Posted by Terminator2
Weird my car and Drew"s both hit only ~80% in the midrange when I max the DC tables out to 100%. But with the same WG settings in that regular 09 file it holds 100% flat the whole time.

< image snip...>

I have the desired DC set to 100% the whole time it just will not see it as for the airload limits I have his car set at 275% DAL but it does not ever go above 255% DAL.
The Desired Boost axis are different in the Proportional Max table between the Stock & GMPP files. 17.x in the stock, 23.x for the GMPP so you are getting into the higher column sooner raising the max, no?

I've been playing with the Frankenstein '08 file this weekend on mine, but had some weird throttle body CEL's once. Forgot the codes though. My stock '08 read entire with the 3 bar MAPs.
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Old May 9, 2011 | 02:54 PM
  #1686  
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Originally Posted by Iam Broke
The Desired Boost axis are different in the Proportional Max table between the Stock & GMPP files. 17.x in the stock, 23.x for the GMPP so you are getting into the higher column sooner raising the max, no?

I've been playing with the Frankenstein '08 file this weekend on mine, but had some weird throttle body CEL's once. Forgot the codes though. My stock '08 read entire with the 3 bar MAPs.
Mine is fine as long as I leave the prop gain and all the axis settings alone. If I mess with the prop gain too much my car cuts out in 1st gear at WOT. It pulls spark and cut the injectors. Only first gear though 2nd, 3rd, 4th WOT is normal no issues at all. Not sure why my best guess is some sort of torque management.
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Old May 9, 2011 | 05:13 PM
  #1687  
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Originally Posted by Terminator2
Mine is fine as long as I leave the prop gain and all the axis settings alone. If I mess with the prop gain too much my car cuts out in 1st gear at WOT. It pulls spark and cut the injectors. Only first gear though 2nd, 3rd, 4th WOT is normal no issues at all. Not sure why my best guess is some sort of torque management.
I will have some logs today or tomorrow. Works a bitch right now and we have night ops tonight.
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Old May 9, 2011 | 11:54 PM
  #1688  
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Originally Posted by Terminator2
Nope but I seriously douubt a fully bolted and tuned stock turbo LNF will make more than 320 whp on that dyno he used. Do you honestly think that it is normal for a brand new LS3 to make only 347 whp? Sorry they normally make 380-385 whp on a dynojet.
It's not boosted. It won't cheat the correction factor as well as a turbo car.
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Old May 10, 2011 | 12:05 AM
  #1689  
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Originally Posted by Terminator2
Your stock turbo LNF also made 240 whp on your dyno. Your mustang dyno reads higher than any other mustang dyno I have ever seen before. Stock LNFs make 210-220 whp on Mustang dynos normally. Many cars I have tuned have reached their fueling limits on the stock turbo on E-47 at 24 psi and lower whp and wtrq numbers than your shop car on E-74. Hmm I wonder why? The torque limit on E-47 is about 425 wrtq and on E-74 it is about 10% lower or ~382 wrtq.
Say what you want, but you are wrong. I picked up 40whp when I went to a dynojet dyno day. We fully doucumented it. I also trapped 119mph on 26" slicks immediately after putting down 356 on our dyno. Are you saying that this car that just put down 393 will be trapping 125? Sorry, Term, you may have some experience tuning LNFs, but you are not going to get in here and talk **** about our dyno numbers. We back them up time and time again.

I also find it interesting how you post corrected hp numbers, but then throw out blanket statement power numbers for the fuel system. If the uncorrected hp limit remains a constant based on fuel system limitations, wouldn't the correction factor cause it to become a wide range of power levels based on when and where you dyno? That is something that most people don't think about.

Last edited by Matt M; May 10, 2011 at 12:19 AM.
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Old May 10, 2011 | 12:55 AM
  #1690  
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can the urinating contest stop in here. Its much easier to make really good dyno numbers when you have unlimited access to a dyno. I also dyno'd my car stock on a dyno jet. Also this is a dyno sheet from when I did the superchips tune a long time ago. Also I don't think I am near a 125 trap, but a 120+ trap isnt out of the question, I trapped 114.7 with stock turbo and less mods in FL.
250/259 on a dyno jet at sea level.


Originally Posted by Matt M
Say what you want, but you are wrong. I picked up 40whp when I went to a dynojet dyno day. We fully doucumented it. I also trapped 119mph on 26" slicks immediately after putting down 356 on our dyno. Are you saying that this car that just put down 393 will be trapping 125? Sorry, Term, you may have some experience tuning LNFs, but you are not going to get in here and talk **** about our dyno numbers. We back them up time and time again.

I also find it interesting how you post corrected hp numbers, but then throw out blanket statement power numbers for the fuel system. If the uncorrected hp limit remains a constant based on fuel system limitations, wouldn't the correction factor cause it to become a wide range of power levels based on when and where you dyno? That is something that most people don't think about.
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Old May 10, 2011 | 09:55 AM
  #1691  
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Originally Posted by Matt M
Say what you want, but you are wrong. I picked up 40whp when I went to a dynojet dyno day. We fully doucumented it. I also trapped 119mph on 26" slicks immediately after putting down 356 on our dyno. Are you saying that this car that just put down 393 will be trapping 125? Sorry, Term, you may have some experience tuning LNFs, but you are not going to get in here and talk **** about our dyno numbers. We back them up time and time again.

I also find it interesting how you post corrected hp numbers, but then throw out blanket statement power numbers for the fuel system. If the uncorrected hp limit remains a constant based on fuel system limitations, wouldn't the correction factor cause it to become a wide range of power levels based on when and where you dyno? That is something that most people don't think about.
I am not "talking ****" as you put it. What I am saying about torque limits and fueling has been proven time and time again by me and the other tuners of this site and yet your car is magic it somehow makes more torque on E-74 without hitting the fueling limit than the cars I tune on E47 or even E-30. Sorry but the torque limit on E-74 no what you do with the injector constant, rail pressure ramping and injection timing is much lower than your car was able to make on the stock fuel system. Your car made 240 whp SAE stock on your mustang dyno you posted the dyno sheets right after you picked the car up. So if you take that 10-12% difference that normally exists between a dynojet and a mustang dyno your car made 264-270 whp SAE stock on a dynojet?
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Old May 10, 2011 | 09:59 AM
  #1692  
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A dyno is a tuning tool
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Old May 10, 2011 | 10:04 AM
  #1693  
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Originally Posted by Sweetsandman
A dyno is a tuning tool
I agree 100%. It sucks that Andrew lives 2,000 miles away and I could not be there to dyno tune the car. Still made excellent power for just a street tune.
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Old May 10, 2011 | 10:18 AM
  #1694  
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The internet is a great thing, Im sure the shop he goes to has WIFI. Arrange a time so you can exchange logs and tunes quickly and let's see what it really has
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Old May 10, 2011 | 10:30 AM
  #1695  
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Originally Posted by BYT*SS*TURBO
The internet is a great thing, Im sure the shop he goes to has WIFI. Arrange a time so you can exchange logs and tunes quickly and let's see what it really has
He went at 7:30-7:30 PM his time which is 10:00-10.30 PM my time. I was sleeping LOL.
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Old May 10, 2011 | 10:33 AM
  #1696  
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That's why Im saying arrange the next one to suit both of you..
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Old May 10, 2011 | 10:50 AM
  #1697  
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Originally Posted by BYT*SS*TURBO
That's why Im saying arrange the next one to suit both of you..
that would be nice. I will have the 4 door on the dyno next time I go. The 2 door is gonna take a dyno break for a few weeks.
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Old May 10, 2011 | 10:56 AM
  #1698  
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Nice, LMK Drew! I have an aircard and Id like to do the same thing Im suggesting and be able to adjust it while you dyno.
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Old May 10, 2011 | 10:57 AM
  #1699  
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Originally Posted by drewbroo
that would be nice. I will have the 4 door on the dyno next time I go. The 2 door is gonna take a dyno break for a few weeks.
I am curious what the 4 door makes on that mustang dyno. I would guess 310-315 whp 360-370 wrtq.
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Old May 10, 2011 | 12:28 PM
  #1700  
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Originally Posted by Terminator2
I am curious what the 4 door makes on that mustang dyno. I would guess 310-315 whp 360-370 wrtq.
Feels like well over 400 ftlbs. My guess is 330/410 on the mustang. I am going to dyno the TF E85 tune vs the BYT E85 Tune.
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