Super-cool air = more boost? - GM Forum - Buick, Cadillac, Chev, Olds, GMC & Pontiac chat


Forced Induction All questions and problems regarding Superchargers, Turbos, NOS, ZEX, intercoolers, water injection, etc.

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Old 01-13-2007, 05:13 AM   #1
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Default Super-cool air = more boost?

We're in the middle of a deepfreeze here, and tonight it got down to -36C. At WOT, at the top of the gears I was making ~11.7lbs of boost and almost 270hp according to the Aeroforce gauge. The car moved like stink too. All I could see in the rearview was twin-stacks of exhaust smoke screen.

Am I really supposed to get that much more power with air that cold?
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Old 01-13-2007, 05:27 AM   #2
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Default Re: Super-cool air = more boost?

my car runs significantly better at anything below 40*
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Old 01-13-2007, 05:29 AM   #3
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Default Re: Super-cool air = more boost?

Quote:
Originally Posted by captainmiller
We're in the middle of a deepfreeze here, and tonight it got down to -36C. At WOT, at the top of the gears I was making ~11.7lbs of boost and almost 270hp according to the Aeroforce gauge. The car moved like stink too. All I could see in the rearview was twin-stacks of exhaust smoke screen.

Am I really supposed to get that much more power with air that cold?
Sounds about right. ESP if you're not at a high altitude.

My bonnie tends to run better when it'* cool out, but then again, most cars do...
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Old 01-13-2007, 05:57 AM   #4
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I love mine in cold weather. Colder denser air is much more beneficial
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Old 01-13-2007, 06:17 AM   #5
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Default Re: Super-cool air = more boost?

Quote:
Originally Posted by captainmiller
Am I really supposed to get that much more power with air that cold?
Yup. Cold air and low humidity are wonderfull things for a motor...kinda sucks for people, but engines love it. The SC can move the denser air and pack it into the cylinders more efficiently. Even an N/A motor acts like it has a larger displacement when the air it is breathing is cold and dry.
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Old 01-13-2007, 07:04 AM   #6
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Yeah, definitely, the tires actually lose grip when its cold, but when its really hot, the car feels sluggish. Colder air is denser. much better.
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Old 01-13-2007, 10:51 AM   #7
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That is why you put on a "Cold Air Intake"
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Old 01-13-2007, 01:23 PM   #8
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Yes colder air will definitely make more power.
The same rule applies as will cold air induction.
1% more power for every 10F drop in temp......so -40 to +80 is 12% more power i.e. if you have 240 hp you will gain almost 30 hp
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Old 01-13-2007, 02:59 PM   #9
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Should seen me the other morning at -16F Once the car was warmed up
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Old 01-15-2007, 04:49 AM   #10
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also cold tires wont grip as well as hot sticky ones...so it may seem to break them loose easier
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