New personal record on my 2014 Ford PIU 3.7 N/A Catback, 80mm Throttle Body Swap from a 2012 Coyote + Tune, 53HP gain at 3200 ft above sea level. and there is room for more
Max 321 HP at 6600 rpm
Max torque 312 at 4500 rpm
How Altitude Affects Horsepower
At 3,280 ft (1,000m), air density is about 90-92% of sea level.
That means your engine is losing 8-10% power compared to sea level.
Since you’re currently making 321 HP at 1,000m, the estimated power at sea level would be:
321
Estimated HP at Different Altitudes
Altitude Air Density (%) Estimated HP
Sea Level (0m) 100% ~357 HP
1,000 ft (305m) ~96.5% ~342 HP
2,000 ft (610m) ~93% ~335 HP
3,280 ft (1,000m) ~90-92% 321 HP (your current output)
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