C8 Air Filter
CF Community Team
Joined: Nov 2005
Posts: 5,177
Likes: 2,824
From: Charlotte N.C.
You don't understand what measurement uncertainty means. Dyno accuracy and differences between pulls is probably a big contributor but the car itself, tire pressure, engine temp add, the operator adds, the air density and temperature add. I would bet if they did five pulls with the same car, no changes between runs, they'd find more than a 5hp difference between highest and lowest pull. Probably 15hp.
CF Community Team
Joined: Nov 2005
Posts: 5,177
Likes: 2,824
From: Charlotte N.C.
Safety Car
Joined: Nov 2007
Posts: 4,433
Likes: 873
From: Bay Area CA
You don't understand what measurement uncertainty means. Dyno accuracy and differences between pulls is probably a big contributor but the car itself, tire pressure, engine temp add, the operator adds, the air density and temperature add. I would bet if they did five pulls with the same car, no changes between runs, they'd find more than a 5hp difference between highest and lowest pull. Probably 15hp.
Last edited by Mike's LS3; Oct 3, 2025 at 04:36 PM.
CF Community Team
Joined: Nov 2005
Posts: 5,177
Likes: 2,824
From: Charlotte N.C.
There are differences for each of those things you just mentioned. Even the operator will have differences each time they mash the pedal. Even if you did one pull after another there is time involved, time for air density to change. Add in the time to change the air filters... The biggest thing is the dyno itself. I'm not saying that there couldn't be an increase in horse power, I'm just saying that saying it was 5 or 6 or whatever is within the measurement uncertainty of the test done. Dynamometers are not that accurate, ask any maker of one. Ask any tuner about the calibration of their dyno.
"430 rwhp with a 5 rwhp gain = 1.16% measured uncertainty with aftermarket air filter." is for sure NOT a calculation for measurement uncertainty. You do understand that, correct?
Probably as accurate as doing a 1/4 mile before and after.
As far as arguing, I guess I am. But everything has a trade off, you don't get something for nothing. I'm not trying to sell you an AC Delco filter or a reusable one, whatever brand. I'm just saying be realistic in your assumptions.
"430 rwhp with a 5 rwhp gain = 1.16% measured uncertainty with aftermarket air filter." is for sure NOT a calculation for measurement uncertainty. You do understand that, correct?
Probably as accurate as doing a 1/4 mile before and after.
As far as arguing, I guess I am. But everything has a trade off, you don't get something for nothing. I'm not trying to sell you an AC Delco filter or a reusable one, whatever brand. I'm just saying be realistic in your assumptions.
Race Director
Joined: Sep 2016
Posts: 13,180
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Melting Slicks
Joined: Oct 2008
Posts: 2,044
Likes: 1,075
From: Pasadena Texas
I feel like he was being realistic. I also watched the video several times and felt that Paragon did everything in their power to give like to like results. Perhaps you would like to receive the 3 different air filters and do your own testing and filming, just a thought.
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Melting Slicks
Joined: Oct 2009
Posts: 2,560
Likes: 485
From: Moberly, Mo
Old-goat, I'm sure we have crossed paths back in the old G8 days. I had a Magnuson SC G8GT and was very active on both G8 forums. I was either Locrzn or Laynlo on the forums. Been a long time so I can't remember which one. Thanks for posting the video. Each little hp counts if that's what you want to do, it's just a man thing no matter what kind of vehicle you drive. I don't believe in leaving anything unmodified and I probably won't leave this one stock either. Maybe not like my G8, Camaro's or C7, but some form of mods will get done. If we left everything stock, there wouldn't be an aftermarket. Lets keep modding and keep the aftermarket heathy.
Last edited by 99vetteran; Oct 12, 2025 at 10:07 AM.