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| Pontiac - Boost Turbo, supercharged, Nitrous, EFI & other Power Adders discussed here. |
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#16
04-01-2013, 07:58 PM
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Well Travis, my little excel spreadsheet (compliments of Dave Austin and verified with the math & physics formulas) says that at 40 psi, 85 degree inlet air, 74% compressor efficiency, 12% parasitic losses, and the supercharger actually moving 240 lbs of air per minute (2400 horsepower) would suck up 505 horsepower.
I would say that we are in agreement on your post. Tom Vaught Bruce, that Rule of Thumb "10 hp of drive for every 100 hp added" or "One Hp to move One Pound of Air Mass and 1 lb air mass makes 10 hp" " only works for a pressure ratio of about 2 (15 psi boost) At 20 psi of boost you are talking around 120 hp to move 100 lbs of air mass. At 240 lbs/min you would be talking 300 HP. Raise the boost to 25 psi and you are around 150 hp for 100 lbs air mass. 350 hp to move that 240 lbs of air mass. You get the idea.
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"Engineers do stuff for reasons" Tom Vaught Despite small distractions, there are those who will go Forward, Learning, Sharing Knowledge, Doing what they can to help others move forward. |
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