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      09-29-2011, 02:34 PM   #1
808@702
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About to get cold!

Its about to cool down here in the desert. So my car generally feels more powerful when its cool/ cold. I know its due to denser air and more complete combustion of fuel. Does anyone know what if any HP gains come from this?
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      09-29-2011, 02:49 PM   #2
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You will absolutely see HP increases with cooler air or lower altitudes. Enjoi.
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      09-29-2011, 03:00 PM   #3
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Basically as the air gets cooler it gets denser. Cold dense air carries more oxygen than warm,humid air. Small V8 high reving engines like ours come "alive" in colder weather.
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      09-29-2011, 03:01 PM   #4
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I dont know that you will necessarily see "gains" as much as see less loss from the normal heat.
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      09-29-2011, 03:05 PM   #5
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I just hate the heat and humidity of the South, looking forward to cooler, dry air
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      09-29-2011, 03:10 PM   #6
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way to rub it in...it's still 95 degrees and HUMID here wtf.
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      09-29-2011, 03:32 PM   #7
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At least you HAVE all of your air
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      09-29-2011, 03:33 PM   #8
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Quote:
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At least you HAVE all of your air
+1
I have heard losses up to 3% per 1000 feet of elevation
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      09-29-2011, 03:36 PM   #9
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Went to the drags last night, nice 95 octane mix, 75 degrees, dry and I got my best time: 14.5 @ 101.5...
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      09-29-2011, 03:54 PM   #10
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Probably better gas mileage too I would think.
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      09-29-2011, 03:55 PM   #11
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Too bad I cant have the cold air and be in Hawaii at sea level. Best of both worlds.
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      09-29-2011, 04:22 PM   #12
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Come to Canada. Plenty of cold air up here. Heck we are just a month away from -20C.
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      09-29-2011, 04:27 PM   #13
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It will be an even greater loss once they go FI in the next M3
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      09-29-2011, 04:37 PM   #14
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^ In regards to what?
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      09-29-2011, 04:42 PM   #15
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Loading my surfboard on my M3 and getting to the beach. Really fast!
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      09-29-2011, 04:50 PM   #16
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Nice! Pics?
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      09-29-2011, 05:26 PM   #17
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Quote:
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^ In regards to what?
Forced induction suffers even greater power loss than normally aspirated engines when the air is hot. There was a recent Top Gear that panned the new Porsche Turbo until they took it out at night and it was a beast.
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      09-29-2011, 06:17 PM   #18
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Quote:
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At least you HAVE all of your air
Sucks that we drive M3s with effectively less than 350hp. Although I have noticed the typical benefits of the cooler Fall weather.
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      09-29-2011, 07:49 PM   #19
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Quote:
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Went to the drags last night, nice 95 octane mix, 75 degrees, dry and I got my best time: 14.5 @ 101.5...
Your M3 does 14.5@101.5??? are you shifting at 5,000rpm? or am I missing something here?
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      09-29-2011, 08:04 PM   #20
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^lol!!!! True my mazdaspeed 3 can beat up with you!
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      09-29-2011, 09:17 PM   #21
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Quote:
Originally Posted by Superfly_M3 View Post
Your M3 does 14.5@101.5??? are you shifting at 5,000rpm? or am I missing something here?
Check his location. Poor wheezing S65 up here...
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      09-29-2011, 09:49 PM   #22
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Yep.. assuming the S65 makes what.. 360hp at the wheels? Means about 320hp in Rockies/Foothills. Assuming ~3500ft.
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