AC cuts out at high revs. Cool feature? - Toyota GR86, 86, FR-S and Subaru BRZ Forum & Owners Community

Superhatch · 06-28-2012, 09:57 AM

BRZ 6MT Ltd.

I haven't done any close monitoring of when this happens, but yesterday I noticed that when the AC was on and I was running to 7.4K through 1-2-3 that at the very top of 2nd gear the AC turned off and my cool air turned warm and the fan cut back a little.

I'm assuming that the ECU is programmed to understand that if you are wringing it out you want full power and it cuts the AC to do so. I don't see any mention of this in the manual so I wanted so see if others had the same experience.

was385 · 06-28-2012, 10:04 AM

nice, another excuse to redline the car on the way home!

ahausheer · 06-28-2012, 10:09 AM

AC is designed to turn off at high RPM. Perfectly normal.

Dave-ROR · 06-28-2012, 10:16 AM

By design, not at all unique to this car or new

Ranatsu · 06-28-2012, 10:16 AM

The A/C clutch disengages when the engine is under high load.

serith · 06-28-2012, 10:34 AM

Most cars will cut the a/c when you step on the gas hard.

DantKR · 06-28-2012, 12:07 PM

Question is, why are you revving it all the way to redline with the AC on anyways D;?

phattyduck · 06-28-2012, 12:47 PM

Quote:

Originally Posted by DantKR

Question is, why are you revving it all the way to redline with the AC on anyways D;?

Because it automatically turns off? Because it was hot outside to avoid damaging things? Ummm... lots of good reasons.

Yeah, most cars with EFI (like, since the 80's) have done this. It is just as much to save the AC compressor as it is to give you more power.

-Charlie

DantKR · 06-28-2012, 12:56 PM

If you know you're going to be redlining it through 3 gears you shut it off anyways before hand :P

trifenix · 06-28-2012, 02:13 PM

Quote:

Originally Posted by DantKR

If you know you're going to be redlining it through 3 gears you shut it off anyways before hand :P

Yea.. Any honda owner knows this is how you get up hills with b series motors

06-28-2012, 09:57 AM	#1
Superhatch AIM4APX Join Date: Jun 2012 Drives: 2013 WRB BRZ Limited Location: Milwaukee Posts: 1,206 Thanks: 642 Thanked 749 Times in 324 Posts Mentioned: 8 Post(s) Tagged: 0 Thread(s)	AC cuts out at high revs. Cool feature? BRZ 6MT Ltd. I haven't done any close monitoring of when this happens, but yesterday I noticed that when the AC was on and I was running to 7.4K through 1-2-3 that at the very top of 2nd gear the AC turned off and my cool air turned warm and the fan cut back a little. I'm assuming that the ECU is programmed to understand that if you are wringing it out you want full power and it cuts the AC to do so. I don't see any mention of this in the manual so I wanted so see if others had the same experience. __________________ "It's very difficult to present technology as an overtly positive sales device to people who want an emotional car" -Chris Harris

06-28-2012, 10:09 AM	#3
ahausheer Re-member Join Date: Nov 2011 Drives: Toyota camry Location: S. Cali Posts: 1,001 Thanks: 98 Thanked 292 Times in 152 Posts Mentioned: 2 Post(s) Tagged: 0 Thread(s)	AC is designed to turn off at high RPM. Perfectly normal. __________________ Nothing decays like progress, and nothing preserves like neglect.

06-28-2012, 10:16 AM	#4
Dave-ROR Site Moderator Join Date: Dec 2010 Drives: Stuff Location: Florida Posts: 10,317 Thanks: 955 Thanked 5,965 Times in 2,689 Posts Mentioned: 262 Post(s) Tagged: 8 Thread(s)	By design, not at all unique to this car or new __________________ -Dave Track cars: 2013 Scion FRS, 1998 Acura Integra Type-R, 1993 Honda Civic Hatchback DD: 2005 Acura TSX Tow: 2022 F-450 Toys: 2001 Chevrolet Corvette Z06, 1993 Toyota MR2 Turbo, 1994 Toyota MR2 Turbo, 1991 Mitsubishi Galant VR-4 Parts: 2015 Subaru BRZ Limited, 2005 Acura TSX Projects: 2013 Subaru BRZ Limited track car build FS: 2004 GMC Sierra 2500 LT CCSB 8.1/Allison with 99k miles

06-28-2012, 10:34 AM	#6
serith Senior Member Join Date: May 2012 Drives: 2009 Scion tC RS 5.0 Location: Syracuse, NY Posts: 148 Thanks: 44 Thanked 63 Times in 33 Posts Mentioned: 3 Post(s) Tagged: 0 Thread(s)	Most cars will cut the a/c when you step on the gas hard. __________________ 09 RS 5.0 -- #862 of 2000 -- 5spd

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06-28-2012, 10:04 AM	#2
was385 Senior Member Join Date: May 2012 Drives: MT WRB BRZ Limited, 2007 911s Location: CT Posts: 812 Thanks: 218 Thanked 381 Times in 181 Posts Mentioned: 9 Post(s) Tagged: 0 Thread(s)	nice, another excuse to redline the car on the way home!

06-28-2012, 10:16 AM	#5
Ranatsu Cone basher Join Date: Mar 2012 Drives: 2017 Subaru BRZ Series.Yellow Location: Dodgin cones in San Antonio, TX Posts: 800 Thanks: 51 Thanked 256 Times in 169 Posts Mentioned: 7 Post(s) Tagged: 0 Thread(s)	The A/C clutch disengages when the engine is under high load.

06-28-2012, 12:07 PM	#7
DantKR Senior Member Join Date: Aug 2010 Drives: Subaru BRZ LT Location: NC Posts: 759 Thanks: 7 Thanked 124 Times in 71 Posts Mentioned: 1 Post(s) Tagged: 0 Thread(s)	Question is, why are you revving it all the way to redline with the AC on anyways D;?

06-28-2012, 12:56 PM	#9
DantKR Senior Member Join Date: Aug 2010 Drives: Subaru BRZ LT Location: NC Posts: 759 Thanks: 7 Thanked 124 Times in 71 Posts Mentioned: 1 Post(s) Tagged: 0 Thread(s)	If you know you're going to be redlining it through 3 gears you shut it off anyways before hand :P

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