When you click on links to various merchants on this site and make a purchase, this can result in this site earning a commission. Affiliate programs and affiliations include, but are not limited to, the eBay Partner Network.
A quick note, though, those numbers are after SAE correction. That is to say, at sea level, you would have 546 horsepower.
An early dyno run on my car had 655 horsepower SAE, but that was only 504 actual uncorrected horsepower because of our altitude.
That being said, we can run more boost in order to make up for that power loss. Consider a smaller pulley if you don't plan on driving to sea level. (The higher power levels at sea level might require methanol, or something similar.)
Where'd you get it tuned at?
edit: Nevermind I see you went to Clint, up at A.I.R, good stuff, he knows what he's doing.
A quick note, though, those numbers are after SAE correction. That is to say, at sea level, you would have 546 horsepower.
An early dyno run on my car had 655 horsepower SAE, but that was only 504 actual uncorrected horsepower because of our altitude.
That being said, we can run more boost in order to make up for that power loss. Consider a smaller pulley if you don't plan on driving to sea level. (The higher power levels at sea level might require methanol, or something similar.)
Where'd you get it tuned at?
edit: Nevermind I see you went to Clint, up at A.I.R, good stuff, he knows what he's doing.
Enjoy the ride, man, boosted is so much fun.
I had no clue that's how it works. All I know it was done on a dynojet. So does the computer automatically do the correction relative to colorado?
Yeppers, that's what the SAE means up in the upper right corner. It's a good tool to compare it to other cars without having to worry about altitude differences. You can see on the end of the bottom line in red it says "SAE: 1.22" (This number is calculated by SAE standards and is based on current air pressure, temperature, and humidity.)
That the correction factor and means it's taking the actual numbers and multiplying it by 1.22 in order to get a sea-level number.
So your peak of 546 horsepower corrected is 546/1.22 or 447 horsepower. That means, due to our altitude, you're taking a 100 horsepower hit versus how the car would perform at sea level.
Of course, other cars will take the same hit (save for Teslas, but we won't get into that). A stock C7 will dyno to around 410 wheel horsepower at sea level, but up here that'd be around 336 horsepower. (or less, depending on the weather.)
Yeppers, that's what the SAE means up in the upper right corner. It's a good tool to compare it to other cars without having to worry about altitude differences. You can see on the end of the bottom line in red it says "SAE: 1.22" (This number is calculated by SAE standards and is based on current air pressure, temperature, and humidity.)
That the correction factor and means it's taking the actual numbers and multiplying it by 1.22 in order to get a sea-level number.
So your peak of 546 horsepower corrected is 546/1.22 or 447 horsepower. That means, due to our altitude, you're taking a 100 horsepower hit versus how the car would perform at sea level.
Of course, other cars will take the same hit (save for Teslas, but we won't get into that). A stock C7 will dyno to around 410 wheel horsepower at sea level, but up here that'd be around 336 horsepower. (or less, depending on the weather.)
Great Info! Had no clue that's how it worked. Thanks! How accurate of a calculation is that in fact?
Accurate enough to use as a measuring and comparison tool, but a lot of will will depend on how recently and accurately the dyno's weather station is calibrated, where it's located in relation to the rest of the dyno and where the intake air comes from, etc.
For instance, consider a shop without an air conditioner, really hot in the summer, even hotter than outdoors. It's dyno weather station may be mounted somewhere where it gets that hot indoor temp, but then the dyno operator has is fan pulling slightly cooler air from outdoors to the engine. This will skew the correction factor, showing more power than actual.
Do note, that this can happen at any altitude, since even at sea level, weather can cause changes in air density, aka "density altitude." Sometimes, this is nice, on cool nights, cars can actually race in negative density altitude, giving them even better quarter mile/track times.
07-01-2017, 12:50 AM
A&A Supercharger Install - Dyno Tuned. Denver Colorado. 5280 Ft.
