How Much Does Cold Air Effect HP
Thread Starter
Instructor
Joined: Feb 2003
Posts: 165
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From: Lawrence KS
How Much Does Cold Air Effect HP
With a cold air intake on a C5 how much does it affect you? I've noticed a very big difference from the common 15 degree temps in the winter in Kansas and the 100+ temps in the summer.
So how much of a difference does it make?
So how much of a difference does it make?
Team Owner
Joined: Mar 2001
Posts: 21,325
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From: small town in S.E Pa. PA
St. Jude Donor '03-'04
Sorry I made a mistake here...Im human too. its 1.5 % for every 10 degrees this is the % used to calculate corrected and uncorrected dyno numbers.,..For C5's
Last edited by Evil-Twin; Mar 28, 2008 at 12:19 AM.
Thread Starter
Instructor
Joined: Feb 2003
Posts: 165
Likes: 1
From: Lawrence KS
So is might and its not FI. The same went for the LT1 camaro I had, it just seems like it has so much more power in the cold especially when going onto and onramp when you have traction.
Must be an illusion...
Must be an illusion...
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Burning Brakes
Joined: Apr 2002
Posts: 808
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From: The Villages FL
St. Jude Donor '13
Interesting, here is published research...
HP Output =
+1% HP per 10 degree temperature decrease
-1% HP per 10 degree temperature increase
One source here...(google is your friend)
http://www.banzairunnerpantera.com/t...techinfo_calcs
and a calculator so you do can do you own analysis
http://wahiduddin.net/calc/calc_hp_dp.htm
It's more about the density of the air and temp is only one factor of density.
But I guess when you feel it...nothing else matters
Don
HP Output =
+1% HP per 10 degree temperature decrease
-1% HP per 10 degree temperature increase
One source here...(google is your friend)
http://www.banzairunnerpantera.com/t...techinfo_calcs
and a calculator so you do can do you own analysis
http://wahiduddin.net/calc/calc_hp_dp.htm
It's more about the density of the air and temp is only one factor of density.
But I guess when you feel it...nothing else matters
Don
Race Director
Joined: Oct 2002
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From: Gone
CI 6-7-8-9-10 Veteran
St. Jude Donor '03
Of course it's going to be a percentage.
I assure you my 5hp snowblower on a 30 degree day does not make 10hp on a 0 degree day.
Since this is the C5 forum, it is safe to assume a 700hp blown C5 packing the cylinders with more of that oxygen-rich air will develop proportionally more hp gain in cold weather than the stock 345hp car will in the same conditions.
Volumetric efficiency is not a constant. Think about it....
I assure you my 5hp snowblower on a 30 degree day does not make 10hp on a 0 degree day.
Since this is the C5 forum, it is safe to assume a 700hp blown C5 packing the cylinders with more of that oxygen-rich air will develop proportionally more hp gain in cold weather than the stock 345hp car will in the same conditions.
Volumetric efficiency is not a constant. Think about it....
Team Owner
Joined: Sep 2003
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From: Raleigh / Rolesville NC
Melting Slicks
Joined: Sep 2003
Posts: 2,062
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EXCELLENT
Do you take in account the temperature sent by the IAT Sensor or is this 1.5% value an SAE outside temperature value?
Christian
Christian
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Instructor
Joined: Feb 2003
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From: Lawrence KS
Team Owner
Joined: May 2005
Posts: 23,682
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From: Flagstaff Az.
Another factor to consider is altitude. My snow blower came with a blurb that said it would lose a little over 2% of its horsepower for every 1,000 feet of elevation over sea level. Considering it's only 10 HP and we are at 7,000 feet it ain't got de horses it needs here in the deep snow so we modified the intake and exhaust. It did make a difference. It affects my vert also to the extent you can tell it. 