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Junkyard Dog

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His most expensive rear wing is putting down between 500 and 1000 pounds of downforce at only 100 miles per hour. He recommends mounting it to the chassis, not a body panel or trunk lid.

It appears to be sucking up 30-60 horsepower at 100mph, too, though.

His splitters can come with custom tunnels increasing downforce, too.

And he tracks and competes with 2 (I think) S550 Mustangs (including a GT350).
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RLE55

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One way to compare would be to spend a lot of time at the track, keeping good records of your lap times and conditions.

Then install something like AJ Hartman's aero.

Then continue tracking your lap times and conditions.

Is there a consistent reduction in lap times in similar conditions?
His most expensive rear wing is putting down between 500 and 1000 pounds of downforce at only 100 miles per hour. He recommends mounting it to the chassis, not a body panel or trunk lid.

It appears to be sucking up 30-60 horsepower at 100mph, too, though.

His splitters can come with custom tunnels increasing downforce, too.

And he tracks and competes with 2 (I think) S550 Mustangs (including a GT350).
Example: My favorite track was Mid Ohio in Lexington, OH. Have run there about 3 times a year for 12 years. My best time was around 1:41, with stock OEM aero on my Roush mustang. Once I converted car to dedicated track car, adding AJ Hartman aero, Splitter, Wing, Diffuser, Canards and dropping some weight (car and driver), I began running times in 1:38+. Best time at Mid Ohio was a 1:36 during the NASA Championships in 2019, placing 8th in a field of 12. Damn Beemers were unbeatable. Anyway, yes, real track times and conditions proved AJ's Aero works and yes, I lost some straight line speed, dropped about 10 mph. Back straight at MO I used to run 145-150 mph, but with the new aero, I was running 135-140. To compensate I wanted more HP, but that would have dropped me into TT2 or TT1 class and the cars there were insanely fast.
AJ's daily track car is his 1999 mustang, running in American Iron Class. He picked up the S550 GT350 in 2020 and began transforming it into a track car, doing tons of aero testing, etc.
 
 








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