hawk1125

iTrader: (1)

Just wondering I have an 02 firehawk with the basic stuff, lid and free mods. I know the factory rating of 345 is at the crank. The car dynoed at 288 rwhp and 298 tq. I live in Colorado at about 5,500 ft does the altitude make any more diff. vs being at sea level. Thanks for any input.

Tainted

iTrader: (9)

yup it does

ChocoTaco369

yes it does. the higher the altitude, the less power you will make. reason being is an engine is a big air pump: the more air that goes in and out, the more power it makes. air at higher altitudes is thinner than air at lower altitudes. the thinner the air, the less power you will make. ideally, you want cool, humid air. i feel my car runs strongest when it's a very humid day with the temps hovering at around 50 degrees. my car seriously feels 20 horsepower stronger on a very cool autumn night than it does in the middle of a 90 degree summer day.

allthrotle

iTrader: (2)

I live at 5000 ft elevation and when I go down to sea level(its like 4hrs away) Its a night and day difference. My car sounds and runs like a totally different car. Sea Level ???.

sportsaddict_21

does ur car run faster times tho in the high alltitudes because there isnt as much gravitation pull on it??? idk just a thought. if there is then would that make up for the lost horses.

98RedBird

iTrader: (77)

Humidity is not better for a car than dry air. The same car will make more hp on a cool/dry night as compared to a cool/humid night. Humidity is water vapor. In a given amount of air, it displaces oxygen content, making the air less dense. As a result, the engine ingests less oxygen, and its output is reduced. For example, on a hot day at sea level, high humidity would cause a carbureted motor to run rich. Same with an injected motor, however, the EFI motor would adapt much better than the carbureted. But a lack of oxygen is still a lack of oxygen.

Hobb3s

iTrader: (23)

Welcome to elevation where FI rules all. I'm going to be getting my car dyno'd soon after I get my intake on and I hope it produces decent numbers although I won't be holding my breath.

00Formula00

iTrader: (6)

my car runs like complete **** when im up at tahoe

ChocoTaco369

humidity plays a very small roll when temperatures are very low. on a 90 degree day with 100% relative humidity, there will be a lot more moisture in the air than on a 10 degree day with 100% relative humidity. when air gets very cold, high humidity barely adds any water to the air at all. at this point, IMO, the little bit denser the humidity makes it can't hurt.

staringback05

iTrader: (8)

pretty much what has been said....higher altitude means less dense air, meaning less air in....meaning less power....


cold dry air is your best option.....in florida we dont have that much and humidity isnt the best thing when it gets into the block

WILWAXU

iTrader: (6)

Lets try this in the Dyno section.

Silverhawk_02TA

Here are my numbers for your comparison:

At sea level, I dyno about 400 HP.

In NM, at 5,000 ft., I dyno about 330 HP. Trust me, it's a difference you can FEEL.

For anyone that doubts the accuracy of SAE correction on a properly calibrated dyno- my SAE corrected numbers at 5,000 ft. normalize the 330 HP right back up to my sea level 400 HP.

Are your numbers uncorrected, or SAE corrected?

MISERICORDIA

iTrader: (6)

Here in SLC at about 4500' my car put down 325 Corrected. Just for kicks I asked to see the uncorrected graph. 270 something. A loss of about 15%. Same thing goes for the track. Most LS1s run low 14s or really high 13s.
Forced induction can of course help but you still loose about the same percentage as an NA car.

staringback05

iTrader: (8)

thatd be enough to make me leave....

DSGKB2.2

Uh,. . .what? Ummm, no---probably not much loss over the gravitational pull thingy because he has a flux capacitor powered by dylithium crystals for the warp drive

Built LT1

iTrader: (3)

A higher elevation would not make your car weigh less. All kidding aside, I did have professor tell me that you would weigh less if the moon was directly overhead, but I don't think it would help you quarter mile times.