AC and H.P.
Team Owner
Joined: Feb 2000
Posts: 45,247
Likes: 892
From: Texas
CI 1-4-5-8-9-10 Vet
St. Jude Donor '03 thru '10, '17
A/C compressor most definitely sucks down some HP. In the older days of bigger compressors and weenie motors - you wouldn't have to ask that question - you could feel it 
I'm not sure about the C6, but most late model cars cut off the air cond. compressor at full throttle.
I'm not sure about the C6, but most late model cars cut off the air cond. compressor at full throttle.
Team Owner
Joined: May 2004
Posts: 82,175
Likes: 1,319
From: McKinney TX
St. Jude Donor '21-'22-'23-'24
Have you noticed a button on the row of Climate Control buttons that looks like a sunburst with a slanted line through it? Pressing that button while the A/C compressor is running will shut it off. See page 3-27 of the owner's manual for details.
Race Director
Joined: Aug 2000
Posts: 10,649
Likes: 31
From: Central Florida
I suspect that, like the C5, the C6 will shut down the AC when the throttle is pressed to the floor.
I use the AC or the heater at max to keep my high speed fans running at the drags. I've run 11.6X with the AC on. That would seem to show that there is no loss of HP at WOT with AC on.
Ranger
I use the AC or the heater at max to keep my high speed fans running at the drags. I've run 11.6X with the AC on. That would seem to show that there is no loss of HP at WOT with AC on.
Ranger
Safety Car
Joined: Dec 2004
Posts: 4,276
Likes: 8
From: Tucson AZ
St. Jude Donor '08-'09-'10-'11-'12-'13-'14-'15
Originally Posted by Ranger
I suspect that, like the C5, the C6 will shut down the AC when the throttle is pressed to the floor.
I use the AC or the heater at max to keep my high speed fans running at the drags. I've run 11.6X with the AC on. That would seem to show that there is no loss of HP at WOT with AC on.
Ranger
I use the AC or the heater at max to keep my high speed fans running at the drags. I've run 11.6X with the AC on. That would seem to show that there is no loss of HP at WOT with AC on.
Ranger
Thread Starter
Le Mans Master
Joined: Feb 2005
Posts: 6,903
Likes: 1,423
From: Any City USA
Originally Posted by SilverCoupe
Have you noticed a button on the row of Climate Control buttons that looks like a sunburst with a slanted line through it? Pressing that button while the A/C compressor is running will shut it off. See page 3-27 of the owner's manual for details.
Team Owner
Joined: May 2004
Posts: 82,175
Likes: 1,319
From: McKinney TX
St. Jude Donor '21-'22-'23-'24
Originally Posted by V Vette
Silvercoupe: you didnt read the question but the other gents have given the answers..Thanks anyway..Hi Ho Silver!
Racer
Joined: Apr 2005
Posts: 403
Likes: 0
From: Lake Havasu, Arizona
Originally Posted by V Vette
Does driving the Vette with the air conditioner on cause lose in HP? I understand gas milage is impacted but how about power? Thanks
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Melting Slicks
Joined: Nov 2004
Posts: 3,064
Likes: 6
From: Pinellas Park Florida
Originally Posted by V Vette
Does driving the Vette with the air conditioner on cause lose in HP? I understand gas mileage is impacted but how about power? Thanks
Well my AC has been active for the last two months here in Sunny Florida, and here is what I have seen: 1. AC cuts off during aggressive acceleration. 2. Turning the AC off really doesn't seem to give back any HP or gas mileage that I can detect.
Le Mans Master
Joined: Aug 2000
Posts: 5,529
Likes: 1,943
From: Austin Texas
Originally Posted by V Vette
Does driving the Vette with the air conditioner on cause lose in HP? I understand gas milage is impacted but how about power? Thanks
Running the A/C may IMPROVE gas milage if/when the alternative is to have the windows open. The power it takes to run the A/C is less than the extra power it takes to propell the car through the air with the windows down at any reasonable velocity (like greater then 60 MPH)
Safety Car
Joined: Dec 1999
Posts: 4,148
Likes: 5
From: Roxbury NJ
As the others said, the PCM disables the A/C at full throttle. The stock LS1 program is set to disable the compressor whenever the throttle position sensor is at 100%, or whenever rpms rise above 4895. A/C is re-enabled once rpms drop below 4545.
I guess you don't need A/C when you're zipping along in 5th gear at 150+ anyway...
I guess you don't need A/C when you're zipping along in 5th gear at 150+ anyway...