How much boost in cold weather?

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Nov 11, 2008 | 10:22 AM

#26

SS4EVER

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From: Metro Detroit, Mi

Quote:

Originally Posted by avro206

1WhiteSSTC sent me this article which explains it best

http://editorial.autos.msn.com/artic...umentid=473407

to paraphrase:

GMPD took an innovative approach to the gutsy four-cylinder. Instead of tuning to a prescribed boost level, the ECU targets a constant torque number using a variable boost strategy.

Ambient air temperature and absolute air pressure are two of the main tuning parameters. So on a cool night with dense air the turbo may only need to produce 13 psi to hit the mark. But on a hot summer day it will unleash up to 21 psi in its efforts to deliver the goods

Ok that makes perfect sense, seeing that the air is colder and thus has more density, it doesn't require the same amount of boost for warmer air with less density to make the same power...

Nov 11, 2008 | 11:17 AM

#27

SRT2SS

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From: Hartland, WI

The Dodge srt4 (Neon and Caliber) aslo have an adaptive pcm. All of this is normal.

Nov 11, 2008 | 03:25 PM

#28

1WhiteSSTC

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From: Alberta

Quote:

Originally Posted by SRT2SS

The Dodge srt4 (Neon and Caliber) aslo have an adaptive pcm. All of this is normal.

how bout mitsu on the evo x? Hyundai on the new Genesis coupe? Anyone else at all?

Nov 11, 2008 | 03:28 PM

#29

SRT2SS

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From: Hartland, WI

Quote:

Originally Posted by 1WhiteSSTC

how bout mitsu on the evo x? Hyundai on the new Genesis coupe? Anyone else at all?

Not quite sure on those cars, but the majority of new cars have adaptive pcms.

Nov 11, 2008 | 03:39 PM

#30

aarroot

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From: Fombell Pa.

It was 33 degrees this morning in Pennnsylvania and I was making 16.5 psi in 2nd gear which is lower than on a warmer day. I'm usually making 18.5 to almost 20psi.

08 SS T/C, Victory Red, LSD, High Wing spoiler, sunroof.

Nov 11, 2008 | 04:08 PM

#31

1WhiteSSTC

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From: Alberta

Quote:

Originally Posted by aarroot

It was 33 degrees this morning in Pennnsylvania and I was making 16.5 psi in 2nd gear which is lower than on a warmer day. I'm usually making 18.5 to almost 20psi.

08 SS T/C, Victory Red, LSD, High Wing spoiler, sunroof.

good another confirmation that u boost lower on colder days, hopefully that will put the ppl at ease.

Nov 11, 2008 | 05:12 PM

#32

avro206

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From: Calgary Alberta Canada

what threw me off a bit--everyone was mentioning temp only---it takes into account absoulte air pressure we well.

Nov 11, 2008 | 05:14 PM

#33

1WhiteSSTC

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From: Alberta

Quote:

Originally Posted by avro206

what threw me off a bit--everyone was mentioning temp only---it takes into account absoulte air pressure we well.

see lol, us young ppl dun know things like absolute air pressure, we've never been taught these things, GM just does it all for us in a computer and we put the pedal to the floor

Nov 11, 2008 | 05:28 PM

#34

jrob7106

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From: Maryland

Doesnt this also mean that with the installation of a more efficient air intake(anything other than the hideous black box) that the horsepower and torque will not increase at all due to the computer noticing more efficient air flow? There for meaning that unless you get tuned an intake is basically pointless?

Nov 11, 2008 | 06:09 PM

#35

1WhiteSSTC

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From: Alberta

Quote:

Originally Posted by jrob7106

yup that is 100% right, thus why u have not seen anyone release an intake for the ss/tc yet........it has to flow 100% like stock or else your losing power, the intake will only be for sound until u can tune it........

Nov 11, 2008 | 08:54 PM

#36

XxCOBALT_TURBOxX

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From: DALLAS TX

Yeah Man Mi 08 Ss/tc Haz Been Doin Tha Same It Defferz In Power Big Time And When It Kold I Only Get Like 13 Psi

Nov 12, 2008 | 08:50 AM

#37

-SS-

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From: Kalamazoo, MI

Quote:

Originally Posted by XxCOBALT_TURBOxX

Yeah Man Mi 08 Ss/tc Haz Been Doin Tha Same It Defferz In Power Big Time And When It Kold I Only Get Like 13 Psi

What?

Nov 12, 2008 | 10:49 AM

#38

SS4EVER

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From: Metro Detroit, Mi

Time for a translation in Ebonics language...

Quote:

Originally Posted by XxCOBALT_TURBOxX

Yeah Man Mi 08 Ss/tc Haz Been Doin Tha Same It Defferz In Power Big Time And When It Kold I Only Get Like 13 Psi

ENGLISH: Yes... man.... My 2008 SS Turbocharged has also been doing the same. It differs greatly in power and when it is cold outside I only get 13 PSI... ding*

Sorry I couldn't resist...

Nov 12, 2008 | 12:17 PM

#39

aarroot

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From: Fombell Pa.

Hahahaha!

Nov 12, 2008 | 12:36 PM

#40

CustyDog

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From: Austin, TX

Quote:

Originally Posted by SS4EVER

Time for a translation in Ebonics language...

ENGLISH: Yes... man.... My 2008 SS Turbocharged has also been doing the same. It differs greatly in power and when it is cold outside I only get 13 PSI... ding*

Sorry I couldn't resist...

LOL!

Nov 12, 2008 | 04:05 PM

#41

1WhiteSSTC

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From: Alberta

someone needs to go back to school and learn english lol

Nov 12, 2008 | 08:10 PM

#42

BowTieTillIdie

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From: Coloradio

Today after the car had been sitting for a few days about 3 days I boosted into the upper 17-18 to 19 PSI range never hitting 20 and then it falls back down to the 16 range. Not sure why...