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Boost Reading

I started at 3000 rpm and ran to 6300 in 3rd gear.

Boost Level sustained: 18
Peak boost level: 20
Date and Time: 3.17.09 at 12:27 pm EST
Nearest Airport: Gainesville, Georgia Airport
Mods: GMPP tune only. Untouched wastegate rod.

Thanks
 

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Discussion Starter #22
SCCA HP Racer

started at 3000 rpm and ran to 6300 in 3rd gear.

Boost Level sustained: 18
Peak boost level: 20
Date and Time: 3.17.09 at 12:27 pm EST
Nearest Airport: Gainesville, Georgia Airport
Mods: GMPP tune only. Untouched wastegate rod.

METAR KGVL 171653Z AUTO 06006KT 10SM CLR 16/08 A3026 RMK AO2 SLP242 T01610078
Elevation 1276'

Density Altitude 1447.5 ft

Absolute Pressure (station pressure) 28.893 in Hg

Relative Density (ISA) 95.83%
Actual Density (kg/m^3) 1.1739
Relative Humidity Relative Humidity = 59%

18PSI (DIC) = 32.2 PSI abs / 2.219 bar
20PSI (DIC) = 34.2 PSI abs / 2.357 bar


My last run:
FLASH

Boost level sustained: 22
Peak boost level: 22
Date and Time: 2009.03.16 04:15 EDT
Nearest Airport: Howell or Pontiac (KOZW or KPTK, Milford Proving Ground is 1/2 way between)
Performance Modifications: GM PUpgrade Kit, 6 shortening wastegate turns from stock, stock intake/exhaust, top down :D

METAR KOZW 162016Z AUTO 00000KT 10SM CLR 14/M08 A3016 RMK AO2

Density Altitude 888.1 ft
270.7 m
Absolute Pressure (station pressure) 29.088 in Hg
985.02 mb
Relative Density (ISA) 97.43%
Actual Density (kg/m^3) 1.1935
Relative Humidity Relative Humidity = 21%

22PSI (DIC) = 36.3 PSI abs / 2.502 bar
22PSI (DIC) = 36.3 PSI abs / 2.502 bar


AND


Boost level sustained: 22
Peak boost level: 23
Date and Time: 2009.03.17 04:15 EDT
Nearest Airport: Howell or Pontiac (KOZW or KPTK, Milford Proving Ground is 1/2 way between)
Performance Modifications: GM PUpgrade Kit, 6 shortening wastegate turns from stock, stock intake/exhaust, top down :D

METAR KOZW 172016Z AUTO 21015G20KT 10SM CLR 20/03 A3000 RMK AO2

Density Altitude 1825 ft

Absolute Pressure (station pressure) 28.932 in Hg

Relative Density (ISA) 94.77%
Actual Density (kg/m^3) 1.1609
Relative Humidity Relative Humidity = 32%

22PSI (DIC) = 36.2 PSI abs / 2.497 bar
23PSI (DIC) = 37.2 PSI abs / 2.566 bar

My car seems to be settling in at a decent 2.4-2.5 bar absolute boost and about 22-23PSI expected on the DIC near standard conditions.
 

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Pretty cool. So I suppose I have some "room" to adjust the wastegate and increase boost.

Thanks Flash's Owner!
 

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Boost level sustained: 13
Peak boost level: 14
Date and Time: 3/18/2009 6:10 PM EST
Nearest Airport: Westover Air Force Base (Chicopee, MA)
Performance Modifications: none
 

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Discussion Starter #25
mimeauja


Boost level sustained: 13
Peak boost level: 14
Date and Time: 3/18/2009 6:10 PM EST
Nearest Airport: Westover Air Force Base (Chicopee, MA)
Performance Modifications: none

METAR KCEF 182155Z AUTO 18015G20KT 10SM CLR 13/03 A2999 RMK AO2 SLP160 T01300029
Elevation 241'

Density Altitude 78.6 ft

Absolute Pressure (station pressure) 29.73 in Hg

Relative Density (ISA) 99.77%
Actual Density (kg/m^3) 1.2222
Relative Humidity Relative Humidity = 51%

13PSI (DIC) = 27.6 PSI abs / 1.903 bar
14PSI (DIC) = 28.6 PSI abs / 1.972 bar



Seems to be consistent with other checks of unmodified stock vehicles, approx 1.9-2 bar.
 

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Flash, I have pure stock 08 GXP w/Auto. Your acceleration testing directions seem to only include stick shifts. Also while I have your ear... when doing a WOT I get a "Traction Loss" message with the traction control turned on. Turning it off I get a message "ECS Active". I think... it might have been ECM, while I read pretty fast, controlling the car becomes a higher priority. Any thoughts?
 

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Discussion Starter #27
Flash, I have pure stock 08 GXP w/Auto. Your acceleration testing directions seem to only include stick shifts. Also while I have your ear... when doing a WOT I get a "Traction Loss" message with the traction control turned on. Turning it off I get a message "ECS Active". I think... it might have been ECM, while I read pretty fast, controlling the car becomes a higher priority. Any thoughts?
It seems that only manual transmission people are the ones responding to the thread, not by my influence.

The flashing traction control message is something that happens when the system detects too much wheel slip. It means that the system is actively controlling inputs such as boost level, spark advance, and/or throttle position to get excessive wheel slip under control.

If you hit your ESC button once, you turn traction off. If you get an ESC Active message, then this means your StabiliTrak has detected parameters such as yaw acceleration, lateral acceleration, and steering wheel angle that indicate a need to intervene to maintain directional control of your car. An example might be when your rear wheels are spinning, since your traction control is now off, something as simple as the rear moving sideways may be enough to cause the ESC (Electronic Stability Control) to activate. Sometimes it can detect things that many drivers simply cannot feel.

Use care when experimenting with these settings, but if you can find a nice controlled environment, such as an autocross course or parking lot that you have permission to use, try tapping your ESC button twice within a second or two. This will turn off traction control, and then will set your StabiliTrak into "competitive mode". This setting has a competitive-oriented set of parameters that may be interesting for you to try. I am not recommending you do this on normal roads.

Remember, with traction control off, you can now create situations where the system has less ability to intervene. A spinning tire can create little to no lateral force.

Hope you found this helpful.
 

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Thanks Flash... Interesting. I will get the Performance Package later next month. I will be getting some numbers together to compare the "before & after".
 

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I was just on the dyno, but the DIC was freaking out with traction control errors (i had ESC off so not sure why) so I didn't get to see the boost. Has anyone else seen this?

I'm right near Newark Airport. So like 25 feet above sea level. I almost always get 16 psi then steady 14

I'm bone stock, but am getting my GMPP installed as we speak (sitting in the waiting room at the dealership right now)
 

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Boost level sustained: 23psi
Peak boost level: 23psi
Date and Time: 4/10/2009 3:00 PM EST
Nearest Airport: Newark Airport EWR
Performance Modifications: GMPP Turbo Performance Upgrade Kit

This is on the way home after having it installed, unfortunately I forgot to turn stability control or go into competition mode.

I was able to get 21psi sustained in 4th gear, and 23psi sustained in 5th gear
 

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Flash's Owner,

Just want to thank you for doing this for us (me). It helped me feel better about the lower numbers I was seeing (knowing that it's not a problem and that the results are expected based on elevation and other factors).

I'm about to get the performance upgrade, so will post new info when I get it.

Thanks Again...
 

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Discussion Starter #32
kennysabarese

Boost level sustained: 23psi
Peak boost level: 23psi
Date and Time: 4/10/2009 3:00 PM EST
Nearest Airport: Newark Airport EWR
Performance Modifications: GMPP Turbo Performance Upgrade Kit


METAR KEWR 101851Z 15007KT 110V180 10SM OVC085 14/01 A3001 RMK AO2 SLP160 T01440011
Elevation: 18'

Density Altitude -114.2 ft

Absolute Pressure (station pressure) 29.99 in Hg

Relative Density (ISA) 100.33%
Actual Density (kg/m^3) 1.2291
Relative Humidity Relative Humidity = 41%

23PSI (DIC) = 37.7 PSI abs / 2.601 bar
 

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I’m maxing my little turbo out up here.

4700’ ASL

3rd Gear Pull
Initial 23 PSI Spike tapering off to 18 PSI at 6,500 RPMS.

4th Gear Pull

Initial 23 PSI Spike tapering off to 20 PSI at 6500 RPMs

Freeway Roll with Competitive Setting.
 

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Boost level sustained: 21psi
Peak boost level: 21psi
Date and Time: 4/9/2009 3:00 PM EST
Nearest Airport: Philadelphia PA
Performance Modifications: GMPP Turbo Performance Upgrade Kit, Dejon CAI, Dejon Intercooler Pipes

I wasn't trying all that hard.
Previously, before the Dejon equipment, I had hit 23psi.
 

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Discussion Starter #35
I’m maxing my little turbo out up here.

4700’ ASL

3rd Gear Pull
Initial 23 PSI Spike tapering off to 18 PSI at 6,500 RPMS.

4th Gear Pull

Initial 23 PSI Spike tapering off to 20 PSI at 6500 RPMs

Freeway Roll with Competitive Setting.
bradyb, I need your location or the nearest airport and date and time, in order to calculate your density altitude.



elff:
Boost level sustained: 21psi
Peak boost level: 21psi
Date and Time: 4/9/2009 3:00 PM EST
Nearest Airport: Philadelphia PA
Performance Modifications: GMPP Turbo Performance Upgrade Kit, Dejon CAI, Dejon Intercooler Pipes

METAR KPHL 091854Z 24014KT 10SM FEW075 17/M06 A2984 RMK AO2 SLP106 T01671061
Elevation 36'

Density Altitude 423.2 ft

Absolute Pressure (station pressure) 29.801 in Hg

Relative Density (ISA) 98.77%
Actual Density (kg/m^3) 1.2099
Relative Humidity Relative Humidity = 20%


21PSI (DIC) = 35.6 PSI abs / 2.457 bar
 

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I already saved you the time, 4700' ASL. SLC 14:00 4/11/09
 

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These are my new numbers with the performance tune! awesome!

Boost level sustained: 17
Peak boost level: 18
Date and Time: 4/16/2009 5:45 PM EST
Nearest Airport: Westover Air Force Base (Chicopee, MA)
Performance Modifications: GMPP Performance Upgrade
 

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Boost level sustained: 19-20psi
Peak boost noted if different than the sustained level: 20psi
Date and time: 4/18/2009 : 9:30am EDT
Nearest airport: Phillips Army Airfield KAPG
Performance Modifications: GMPP Stage II kit, K&N Air Filter
This is a 5-speed manual

Almost can say 20psi was sustained, it was more than a "flash"

FYI, my dashhawk 0-60 time was 5.43, down a little from my pre-GMPP best time of 5.49 I did not try too many runs.

However, now I am losing a little bit of traction in the 1-2 gear shift, and prior to the GMPP upgrade, that did not happen, for me anyway. Think I still have some learning to do to get that time down some more. I know dashhawk times are not that reliable, but the on the same car for the same strip of road for the same driver, they are a fun comparison.
 

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Boost level sustained: 20psi
Peak boost level: 21
Date and Time: 4/17/2009 3:00 PM gmt-7
Nearest Airport: lake havasu city airport AZ
Performance Modifications: see sig

i had lost preasure the day before went to 12. i checked the hose at the TB it was about ready to fall off, tightened clamp. now i get 21 peak in 1-4. have not went that far in 5. since i checked the hose it now gets 21 peak was 20 so it may have been the leak
 

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i had lost preasure the day before went to 12. i checked the hose at the TB it was about ready to fall off, tightened clamp. now i get 21 peak in 1-4. have not went that far in 5. since i checked the hose it now gets 21 peak was 20 so it may have been the leak
I've read about that so much, it resulted in me throwing a little more money at Dejon. I really think their elbow is the permanent solution. It replaces that rubber hose and all the clamps are T-Bolts :thumbs:
 
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