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post #46 of 60 (permalink) Old 04-21-2009, 11:26 PM
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Originally Posted by bradyb View Post
Hey Flash Man, get Rob the Elder's numbers. He's up at 8,000 ASL and he's saying he can pull 23 PSI through third.
Check out page 1 of this thread, already done.
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post #47 of 60 (permalink) Old 05-01-2009, 07:02 AM Thread Starter
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I was playing around with my Driver Information Center, and discovered that you can change your boost gage display to kPa. The increment is in 5 kPa, so a change of 5 kPa on your gage is 0.725 PSI.

This is interesting to me because several days ago I was running in a higher density altitude day (warm and high humidity, nearly 2800' DA), but getting similar pressures as when I was running my car around 1400' DA. My calculated boost pressure was lower but my car still felt just as strong.

It turns out that you can use both the metric and the english measurements to get at a slightly improved discretion for your boost pressure.

I worked it out to approximately 1/3 PSI discretion. They way I do it is run a run or two in metric, then run a run or two in english. I have been able to distinguish between 23.6 and 24.3 PSI on two days, even though my gage only read 24 PSI.


Here is a lookup table for those interested:

DIC of 70 kPa and 10 PSI is [ 10.1 PSI ]
DIC of 75 kPa and 10 PSI is [ 10.4 PSI ]
DIC of 70 kPa and 11 PSI is [ 10.6 PSI ]
DIC of 75 kPa and 11 PSI is [ 10.9 PSI ]
DIC of 80 kPa and 11 PSI is [ 11.3 PSI ]
DIC of 80 kPa and 12 PSI is [ 11.8 PSI ]
DIC of 85 kPa and 12 PSI is [ 12.2 PSI ]
DIC of 85 kPa and 13 PSI is [ 12.7 PSI ]
DIC of 90 kPa and 13 PSI is [ 13 PSI ]
DIC of 95 kPa and 13 PSI is [ 13.4 PSI ]
DIC of 90 kPa and 14 PSI is [ 13.5 PSI ]
DIC of 95 kPa and 14 PSI is [ 13.9 PSI ]
DIC of 100 kPa and 14 PSI is [ 14.3 PSI ]
DIC of 100 kPa and 15 PSI is [ 14.8 PSI ]
DIC of 105 kPa and 15 PSI is [ 15.1 PSI ]
DIC of 110 kPa and 15 PSI is [ 15.5 PSI ]
DIC of 105 kPa and 16 PSI is [ 15.6 PSI ]
DIC of 110 kPa and 16 PSI is [ 16 PSI ]
DIC of 115 kPa and 16 PSI is [ 16.3 PSI ]
DIC of 115 kPa and 17 PSI is [ 16.8 PSI ]
DIC of 120 kPa and 17 PSI is [ 17.2 PSI ]
DIC of 120 kPa and 18 PSI is [ 17.7 PSI ]
DIC of 125 kPa and 18 PSI is [ 18.1 PSI ]
DIC of 130 kPa and 18 PSI is [ 18.4 PSI ]
DIC of 125 kPa and 19 PSI is [ 18.6 PSI ]
DIC of 130 kPa and 19 PSI is [ 18.9 PSI ]
DIC of 135 kPa and 19 PSI is [ 19.3 PSI ]
DIC of 135 kPa and 20 PSI is [ 19.8 PSI ]
DIC of 140 kPa and 20 PSI is [ 20.2 PSI ]
DIC of 140 kPa and 21 PSI is [ 20.7 PSI ]
DIC of 145 kPa and 21 PSI is [ 21 PSI ]
DIC of 150 kPa and 21 PSI is [ 21.4 PSI ]
DIC of 150 kPa and 22 PSI is [ 21.9 PSI ]
DIC of 155 kPa and 22 PSI is [ 22.2 PSI ]
DIC of 155 kPa and 23 PSI is [ 22.7 PSI ]
DIC of 160 kPa and 23 PSI is [ 23.1 PSI ]
DIC of 160 kPa and 24 PSI is [ 23.6 PSI ]
DIC of 165 kPa and 24 PSI is [ 24 PSI ]
DIC of 170 kPa and 24 PSI is [ 24.3 PSI ]
DIC of 170 kPa and 25 PSI is [ 24.8 PSI ]
DIC of 175 kPa and 25 PSI is [ 25.2 PSI ]
DIC of 175 kPa and 26 PSI is [ 25.7 PSI ]
DIC of 180 kPa and 26 PSI is [ 26.1 PSI ]
DIC of 185 kPa and 26 PSI is [ 26.4 PSI ]
DIC of 180 kPa and 27 PSI is [ 26.6 PSI ]
DIC of 185 kPa and 27 PSI is [ 26.9 PSI ]
DIC of 190 kPa and 27 PSI is [ 27.3 PSI ]
DIC of 190 kPa and 28 PSI is [ 27.8 PSI ]
DIC of 195 kPa and 28 PSI is [ 28.1 PSI ]
DIC of 195 kPa and 29 PSI is [ 28.6 PSI ]
DIC of 200 kPa and 29 PSI is [ 29 PSI ]
DIC of 200 kPa and 30 PSI is [ 29.5 PSI ]


Enjoy.

I am a GM Engineer.

I do not claim to be a GM representative, all of my postings are my own interpretation and personal opinions.

I am a proud Solstice GXP owner (Flash). My wife, A FORMER GM engineer, is a proud Solstice GXP Coupe owner (Wicked).

My other hobby: hot turbo wastegate nut adjustment.
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post #48 of 60 (permalink) Old 05-01-2009, 01:22 PM
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You have the GMPP turbo upgrade, correct? (290hp, no lift shift, etc.) I would like to get that upgrade in my 2007 Solstice GXP, but am nervous because I have heard so many horror stories about the dealerships just not doing it right. What should I do?
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post #49 of 60 (permalink) Old 05-02-2009, 04:45 PM
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12:45 PM eastern time
Airport: EWR
20PSI boost in 4th sustained
21PSI boost in 5th sustained
Mods: GMPP Turbo Upgrade Kit

This is lower than I usually get. Maybe the weather has changed and affected it from last time?

2007 Sky Redline - Wester's Tuned - GMPP sensors - RMR Roll Bar - Kirkey Seats
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post #50 of 60 (permalink) Old 05-08-2009, 07:04 AM Thread Starter
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kennysabarese

12:45 PM eastern time
Airport: EWR
20PSI boost in 4th sustained
21PSI boost in 5th sustained
Mods: GMPP Turbo Upgrade Kit

This is lower than I usually get. Maybe the weather has changed and affected it from last time?


METAR KEWR 021651Z 30007KT 10SM BKN047 BKN100 17/08 A2992 RMK AO2 SLP132 T01670078
Elevation 18'

Density Altitude 396.6 ft

Absolute Pressure (station pressure) 29.901 in Hg

Relative Density (ISA) 98.84%
Actual Density (kg/m^3) 1.2108
Relative Humidity Relative Humidity = 55%

20PSI (DIC) = 34.7 PSI abs / 2.392 bar
21PSI (DIC) = 35.7 PSI abs / 2.46 bar



According to this data, so far from what I can tell, the stock car seems to peak out around 2.0 bar, GMPP with little adjustment is around 2.3 bar.

Each 2-3 turns on the wastegate seems to add about 0.1 bar to the max boost.

I am a GM Engineer.

I do not claim to be a GM representative, all of my postings are my own interpretation and personal opinions.

I am a proud Solstice GXP owner (Flash). My wife, A FORMER GM engineer, is a proud Solstice GXP Coupe owner (Wicked).

My other hobby: hot turbo wastegate nut adjustment.
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post #51 of 60 (permalink) Old 05-22-2009, 12:16 PM
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Superchips Boost

08 GXP 5-speed manual

Boost level sustained: 19 psi
Date and time: 5/21/2009 8:30 P.M. EST
Nearest airport: Buttonville/Toronto
Performance Modifications: Superchips 91 Octane Tune. No other mods


Outside temp around 26 degrees C.

The DIC shows outside temps?
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post #52 of 60 (permalink) Old 05-23-2009, 09:14 PM
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Quote:
According to this data, so far from what I can tell, the stock car seems to peak out around 2.0 bar, GMPP with little adjustment is around 2.3 bar.
My first time i got 23PSI (DIC) = 37.7 PSI abs / 2.601 bar

I ran again tonight after driving for 4 hours straight. Weather channel said humidity was 90% so maybe that's why i wasn't getting my normal 23 psi?

5/23/09 9:00pm eastern
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07 Sky Redline Manual
Mods: GMPP Tune, Stock intake with baffles cut off
Sustained 19psi - Peak 20psi

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Last edited by kennysabarese; 05-23-2009 at 09:22 PM.
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post #53 of 60 (permalink) Old 05-29-2009, 07:46 AM Thread Starter
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Quote:
Originally Posted by ddragon View Post
08 GXP 5-speed manual

Boost level sustained: 19 psi
Date and time: 5/21/2009 8:30 P.M. EST
Nearest airport: Buttonville/Toronto
Performance Modifications: Superchips 91 Octane Tune. No other mods


Outside temp around 26 degrees C.

The DIC shows outside temps?
Apparently so.

Elevation 884'
METAR CYKZ 220000Z 22009G16KT 15SM FEW270 26/08 A3004 RMK CI1 SLP169

Density Altitude 2360.4 ft

Absolute Pressure (station pressure) 29.093 in Hg

Relative Density (ISA) 93.27%
Actual Density (kg/m^3) 1.1426
Relative Humidity Relative Humidity = 32%

19PSI (DIC) = 33.3 PSI abs / 2.295 bar

I am a GM Engineer.

I do not claim to be a GM representative, all of my postings are my own interpretation and personal opinions.

I am a proud Solstice GXP owner (Flash). My wife, A FORMER GM engineer, is a proud Solstice GXP Coupe owner (Wicked).

My other hobby: hot turbo wastegate nut adjustment.
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post #54 of 60 (permalink) Old 05-29-2009, 10:17 AM
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Quote:
Originally Posted by ddragon View Post
...

The DIC shows outside temps?
Quote:
Originally Posted by Flash's Owner View Post
Apparently so...
Was good talking to Flash in person recently. Hope you can make TOTD.

Are you saying the DIC can display outside temps and if so, how do we set the DIC?

Not in the manual, I looked. Not to say it can't




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post #55 of 60 (permalink) Old 05-29-2009, 03:39 PM Thread Starter
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Sorry, I guess only the Saturns show outside temps. We never got the DIC upgrade, apparently.

I am a GM Engineer.

I do not claim to be a GM representative, all of my postings are my own interpretation and personal opinions.

I am a proud Solstice GXP owner (Flash). My wife, A FORMER GM engineer, is a proud Solstice GXP Coupe owner (Wicked).

My other hobby: hot turbo wastegate nut adjustment.
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post #56 of 60 (permalink) Old 06-10-2009, 01:50 PM
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2009 GXP Coupe Manual
Time:1430 CDT
Altitude: 500 [I ran across the Dam, ~30' higher than the water which is at 469.7 Today]
Temp: 86
Boost DIC Peak: 25
Boost DashHawk sustained: 22.65
Mods: Minus 4 Turns
Airport: HBZ Elevation 632'



Steve

Thanks

eCar

Last edited by SolNut; 06-10-2009 at 01:53 PM.
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post #57 of 60 (permalink) Old 06-10-2009, 02:58 PM Thread Starter
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Quote:
Originally Posted by SolNut View Post
2009 GXP Coupe Manual
Time:1430 CDT
Altitude: 500 [I ran across the Dam, ~30' higher than the water which is at 469.7 Today]
Temp: 86
Boost DIC Peak: 25
Boost DashHawk sustained: 22.65
Mods: Minus 4 Turns
Airport: HBZ Elevation 632'



Steve

Thanks
2009 GXP Coupe Manual
Time:1430 CDT
Altitude: 500 [I ran across the Dam, ~30' higher than the water which is at 469.7 Today]
Temp: 86
Boost DIC Peak: 25
Boost DashHawk sustained: 22.65
Mods: Minus 4 Turns
Airport: HBZ Elevation 632'

METAR KCCA 101935Z AUTO 26006KT 6SM HZ FEW075 31/24 A2983 RMK AO2
Altitude used for density altitude calc = 632'

(for clarification, just minus 4 turns on the WG? No PUpGrade kit?)

Density Altitude 3092.6 ft

Absolute Pressure (station pressure) 29.155 in Hg

Relative Density (ISA) 91.26%
Actual Density (kg/m^3) 1.1179
Relative Humidity Relative Humidity = 66%

25PSI (DIC) = 39.3 PSI abs / 2.711 bar
22.65PSI (DIC) = 37 PSI abs / 2.549 bar

Your car is acting like a Performance Upgrade Kit was installed. I cannot recall if you told me you had it installed before delivery, but if not your car is the highest damn boost I have ever seen on a stock calibration.

This is roughly what my car runs, approximately 2.6 bar, 6 shortening turns on the WG.

I am a GM Engineer.

I do not claim to be a GM representative, all of my postings are my own interpretation and personal opinions.

I am a proud Solstice GXP owner (Flash). My wife, A FORMER GM engineer, is a proud Solstice GXP Coupe owner (Wicked).

My other hobby: hot turbo wastegate nut adjustment.
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post #58 of 60 (permalink) Old 06-10-2009, 03:41 PM
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Sorry, forgot to include that!!!

I R from Arkansas

Steve

eCar
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post #59 of 60 (permalink) Old 06-10-2009, 03:44 PM
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Quote:
Originally Posted by Flash's Owner View Post
(for clarification, just minus 4 turns on the WG? No PUpGrade kit?)

D
Your car is acting like a Performance Upgrade Kit was installed. I cannot recall if you told me you had it installed before delivery, but if not your car is the highest damn boost I have ever seen on a stock calibration.

This is roughly what my car runs, approximately 2.6 bar, 6 shortening turns on the WG.
I forgot to include that.

Plus, I told you at the 'Goose" that I had it installed @12 Miles.

C U N CO.

Steve

eCar
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post #60 of 60 (permalink) Old 06-11-2009, 07:39 AM Thread Starter
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Quote:
Originally Posted by SolNut View Post
I forgot to include that.

Plus, I told you at the 'Goose" that I had it installed @12 Miles.

C U N CO.

Steve
thanks for the reminder. I forgot that. Good thing to know that the car is operating as expected.

I am a GM Engineer.

I do not claim to be a GM representative, all of my postings are my own interpretation and personal opinions.

I am a proud Solstice GXP owner (Flash). My wife, A FORMER GM engineer, is a proud Solstice GXP Coupe owner (Wicked).

My other hobby: hot turbo wastegate nut adjustment.
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