Quote:
Originally Posted by Snowwolfe
Do any of you have experience dyno testing cars at 6-7000 feet to see what the actual losses are compared to the factory ratings?
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Yes, tons.
Standard absolute sea-level atmospheric pressure = 14.7 psi.
Denver absolute atmospheric pressure = 11.7 psi.
Difference between sea level and Denver psia = 3 psi
14.7 * .80 (or 80%) = 11.7
Denver has 20% less absolute air pressure than sea level.
LT4 hp @ 14.7 psi = 650 bhp
LT4 hp @ 11.7 psi = 520 bhp
LT4 hp @ 0 psi = 0 bhp
Hp drops 20% for every 3 psi reduction in absolute pressure
Boost pressure, a related but different topic, is the pressure in the induction system
in excess of atmospheric pressure.
https://www.engineeringtoolbox.com/a...ure-d_462.html
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2020 ZL1LE A10.
LME LT4 390 short block, LME CID Heads, Kong E2650, FBO.
15" conversion, MT ET Street R 325/15.
100 octane: 1045hp/1055tq.
100 octane + Meth (1x10+): 1117 hp/1067 tq