ac on = loss of horse power?
#4
The amount of HP lost is negligable. The only thing it does that makes it feel slower is it takes longer to build RPMs due to the extra pull from the ac pulley. I ran almost the exact same time in the 1/8 mile with my ac on as I did with it off. I think most of the loss is in our heads rather than actual HP loss. Kinda like those little free mods that add 1-5 hp that people claim to feel a difference.
#5
Actually the AC compressor can suck up as much as 15HP! The reason it won't affect 1/4 mile times much is because the computer automatically disengages the compressor clutch at WOT. It still takes a couple of tenths to do and the AC will kick back in once you get out of the throttle.
#6
Originally posted by danziger
Actually the AC compressor can suck up as much as 15HP! The reason it won't affect 1/4 mile times much is because the computer automatically disengages the compressor clutch at WOT. It still takes a couple of tenths to do and the AC will kick back in once you get out of the throttle.
Actually the AC compressor can suck up as much as 15HP! The reason it won't affect 1/4 mile times much is because the computer automatically disengages the compressor clutch at WOT. It still takes a couple of tenths to do and the AC will kick back in once you get out of the throttle.
#8
Ive heard it kills 5-10 hp...like said it cuts off at wot...around town i guess it wouldnt matter but if your racing turn it off...I always had mine off unless very hot..I noticed a power loss
#10
Originally posted by SR71 Blackbird
With the AC on during a wonderful 100 degree day my car feels like a dog. Feels like the compressor zaps 30 rwhp in my car, floored or not. Turning it off then stomping the gas makes a huge difference.
With the AC on during a wonderful 100 degree day my car feels like a dog. Feels like the compressor zaps 30 rwhp in my car, floored or not. Turning it off then stomping the gas makes a huge difference.
#11
Even at WOT if you have the ac on and you slam it from a stand still the ac does not kick off right away once your rpm's pick up it will kick off (not sure what RPM level) after that as long as you keep you foot in it it should not kick back in. you RPM's never drop enough. buy you do lose power for the time it takes from stop to the RPM point prob lose 1 to 2 tenths of a second. to play it safr turn the ac off
#12
because the computer automatically disengages the compressor clutch at WOT
That is true. The AC shuts off soon as it recognizes a WOT. I laugh when people who drive Camaros/Birds use the AC excuse, or anytime they say it. This has been true since the thirdgens I beleive because my IROC switches off the AC at WOT also.
I have actually tested this accidently. I'm in Florida so my AC is constantly on. Many occassions at the track I've forgotten to turn it off. I forget when the lines are short and I'm constantly moving. Anyways, with both cars, I've seen absolutely NO losses at all. MPH is the same.
I can't really attest to daily driving because I rarely go above 2k rpms. Yeah, I'm a grandpa. But yes it is true that the AC does rob a couple ponies.
#13
Originally posted by SR71 Blackbird
With the AC on during a wonderful 100 degree day my car feels like a dog. Feels like the compressor zaps 30 rwhp in my car, floored or not. Turning it off then stomping the gas makes a huge difference.
With the AC on during a wonderful 100 degree day my car feels like a dog. Feels like the compressor zaps 30 rwhp in my car, floored or not. Turning it off then stomping the gas makes a huge difference.
#14
Like I said earlier, there will still be a delay in the clutch action on the compressor when you "floor" it. This may cost a couple of tenths in a timed run. The reason you don't see people running AC at the track is underhood temps and the possibility of the AC condenser dripping.
#15
Originally posted by chuck
The loss of performance probably has more to do with the fact that it is hot enough outside that you have to run the ac than the fact that the ac is on.
The loss of performance probably has more to do with the fact that it is hot enough outside that you have to run the ac than the fact that the ac is on.
Nooooo. as stated, I turn off the a/c and my car is faster. Feels like usual. Turn on a/c and, viola, power loss.