General Maintenance & Repairs - Accelerating with AC on
07-29-2012, 09:23 PM
I noticed my car is A LOT slower with the AC on and bogs/needs more throttle to get her going from a dig. I know AC is parasitic but it feels like I lose 50 HP with it turned on...ur thoughts?
07-29-2012, 10:31 PM
I never felt any difference when my car was bone stock. Also, if you really get into the throttle the A/C shuts OFF while you're accelerating hard. NOT POSITIVE....but I think if you go 85% throttle or more, it shuts OFF.
50 HP loss........by feel......is A LOT........something else must be wrong. Maybe the compressor is about to go and its getting hard to turn.
07-29-2012, 11:34 PM
I think its in the tune, no AC over 4k rpms.
07-30-2012, 12:26 AM
If things don't go just right from a dig, it can make the car bog badly. As mentioned above, the A/C stops under hard acceleration. When you accelerate hard from a dig, it probably takes the car a moment or so to disable the A/C... but as you know, a moment of hesitation at that point can be the difference between a great launch or the car falling on it's face. If you anticipate needing a fast launch and full acceleration, you may just need to turn the A/C off. I don't know that realistically there is a way of getting around that... maybe someone else can chime in with a different suggestion.
07-30-2012, 11:04 PM
AC on has never caused my car to bog, or any other v6/v8 car I've owned. That's another issue going on.
07-31-2012, 12:11 AM
^^^ I'm with him.
07-31-2012, 02:34 AM
My V6 doesnt bog , feels like it needs a touch more of throttle to launch as quickly when the A/C is on but like mentioned above , the A/C turns off at 90% Throttle and turns back on once the throttle is at 85% or below..
I dont really do spirited driving when the A/C is on but I have easily went 100+ with the A/C on , on the highway and didnt feel a power loss , like I said , just needs a bit more of a throttle when going from a dig..
07-31-2012, 08:24 PM
I can totally tell a difference when my AC is on. Next time you're accelerating... turn your AC on WHILE you're accelerating and you can feel your car lose power as it turns the compressor.
I think that what you're talking about is normal. 50HP? I wouldn't be surprised if that was the case because it definitely uses a lot!
I also don't think that the compressor clutch can disengage fast enough after you accelerate to 90 %. Think about how long it takes for it to disengage after you turn off your AC (you can hear it)
Long story short... I think that what you're experiencing is normal. Every single time I plan on accelerating more than like 3500 rpms I'll turn off my AC. It robs power for sure, and I also heard that it's bad for the compressor to run that fast.
08-01-2012, 03:03 PM
thanks for the advice guys, i just changed my fuel filter and from a dig it feels much more smooth...i think its time for a tune up!
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