C3 Performance Stealing Accessories in Order
Thread Starter
Melting Slicks
Joined: Jun 2016
Posts: 2,979
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From: Woodinville WA
C3 Performance Stealing Accessories in Order
Which C3 engine-driven accessories steal an appreciable amount of HP and in what order?
Adam
- AC
- Engine-Driven Fan
- Water Pump
- Fuel Pump
- Alternator
- etc...
Adam
Last edited by NewbVetteGuy; Jun 23, 2016 at 04:45 PM.
Pro
Joined: Feb 2012
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Don't forget the alternator. I think I remember reading that all the accessories add up to 30% of the efficiency. The A/C compressor really only adds drag when the clutch is engaged.
Le Mans Master
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From: Fernandina Beach FL
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Le Mans Master
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From: Lebanon Township New Jersey
Thread Starter
Melting Slicks
Joined: Jun 2016
Posts: 2,979
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From: Woodinville WA
Wow... You HAVE to be running an 2nd alternator just for that thing, right?
Can you give me more info on it? I had to try and lookup the website that's on it's sticker but it doesn't seem to exist any more.
Adam
Can you give me more info on it? I had to try and lookup the website that's on it's sticker but it doesn't seem to exist any more.
Adam
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Thread Starter
Melting Slicks
Joined: Jun 2016
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From: Woodinville WA
Adam
Team Owner
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From: Orange Park Florida
Thread Starter
Melting Slicks
Joined: Jun 2016
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From: Woodinville WA
Great to see the math! Thanks!
Adam
Le Mans Master
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From: Fernandina Beach FL
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Here's the website- http://cool-it.ca/
Also used on electric cars- looked a Prius but it's a 208v piece.
http://www.electriccarpartscompany.c...2kg_p_152.html
Race Director
Joined: Apr 2007
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From: South Western Ontario
The newer GM EFI systems model the engine output torque so they include the accessory draws. On my car,
The accessory torque (water pump, PS pump, alternator) is modeled as 4ft-lbs to 6ft-lbs going from 1000-6000rpm.
The AC compressor torque is modeled around 10-12 ft-lbs at normal pressures.
The electric compressor will be WAY more efficient because it is optimized to run at one speed. Same applies to electric fans. Both will use NO power when off too compared to engine driven which always use some power.
The accessory torque (water pump, PS pump, alternator) is modeled as 4ft-lbs to 6ft-lbs going from 1000-6000rpm.
The AC compressor torque is modeled around 10-12 ft-lbs at normal pressures.
The electric compressor will be WAY more efficient because it is optimized to run at one speed. Same applies to electric fans. Both will use NO power when off too compared to engine driven which always use some power.
