air conditioning how fast

bratmantlz · 07-08-2001, 08:42 PM

how fast has everyone driven with their ac on.?? or how fast is the safest speed to drive with it on.... curious..
Brat

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GooseMan · 07-08-2001, 09:51 PM

why would overall speed affect the A/C??? Or, why would A/C affect the overall speed? Is that your question?

Siper2 · 07-08-2001, 10:18 PM

I don't think it affects top speed at all. It certainly draws on engine power, so it affects acceleration, but that's it.

-S2-

imprezadan · 07-08-2001, 11:24 PM

I haven't even noticed a difference in engine temp when I'm in traffic with the ac on. It certainly won't hurt anything. If it's making the car overheat or something, you have a problem that needs to be checked out!

ImprezaGuy · 07-09-2001, 12:30 AM

The A/C compressor will shut off at full throttle ( at least that is what i have heard) and will therefor not affect top speed in the slightest (since you'll be flooring it to achieve top speed)

elemental · 07-09-2001, 02:03 AM

if it didn't shut off at full throttle though, the top speed should be lower because the AC uses power from the engine (lowers hp, through the whole band) meaning peak hp would be lower --> lower top speed... unless our cars are drag limited, like i've heard, but i find it hard to believe for this reason and others: wrx ver. 3 or 4 or 5 or whatever all had top speed higher than ours and about the same styling, so i don't think you've hit the drag limit yet =) maybe if i put a greddy lip on, but those are cool looking

Spectre23 · 07-09-2001, 10:52 AM

An uh.... friend of mine

has gone as high as 138 ish in a '98 RS with A/C on and no heating problems.

Clegg · 07-09-2001, 01:17 PM

122Mph with my RS with the A/C on

bratmantlz · 07-09-2001, 02:03 PM

no iwas worried high speeds with it on could damgage the compressor. since usually the car is going at city speeds when the ac is on....
Brat

ImprezaGuy · 07-09-2001, 03:08 PM

The speed of the compressor is engine speed related (i.e. - it is revelant to RPM) and is not in any way related to wheel speed. So travelling 90 with the engine at 4k will have the compressor spinning the same as at 20 MPH (or wherever 4k RPM is in first gear).

07-08-2001, 08:42 PM	#1
bratmantlz Scooby Specialist Member#: 3231 Join Date: Dec 2000 Chapter/Region: RMIC Location: colorado springs colorado usa Vehicle: 88 626 Turbo white	air conditioning how fast how fast has everyone driven with their ac on.?? or how fast is the safest speed to drive with it on.... curious.. Brat * Registered users of the site do not see these ads.

07-09-2001, 12:30 AM	#5
ImprezaGuy Scooby Newbie Member#: 4400 Join Date: Feb 2001 Location: Overland Park, Ks, USA Vehicle: 2000 Impreza Rs Sedona Red Pearl	A/C The A/C compressor will shut off at full throttle ( at least that is what i have heard) and will therefor not affect top speed in the slightest (since you'll be flooring it to achieve top speed)

07-09-2001, 03:08 PM	#10
ImprezaGuy Scooby Newbie Member#: 4400 Join Date: Feb 2001 Location: Overland Park, Ks, USA Vehicle: 2000 Impreza Rs Sedona Red Pearl	Compressor Speed The speed of the compressor is engine speed related (i.e. - it is revelant to RPM) and is not in any way related to wheel speed. So travelling 90 with the engine at 4k will have the compressor spinning the same as at 20 MPH (or wherever 4k RPM is in first gear).

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07-08-2001, 09:51 PM	#2
GooseMan Scooby Specialist Member#: 2462 Join Date: Sep 2000 Chapter/Region: SCIC Location: Los Angeles/Montreal Vehicle: 2012 Volvo S60 T5 2005 Triumph Sprint ST	why would overall speed affect the A/C??? Or, why would A/C affect the overall speed? Is that your question?

07-08-2001, 10:18 PM	#3
Siper2 Scooby Guru Member#: 1134 Join Date: Mar 2000 Chapter/Region: MAIC Location: Dillsburg, PA Vehicle: 2007 BMW 328xi wagon Silver	I don't think it affects top speed at all. It certainly draws on engine power, so it affects acceleration, but that's it. -S2-

07-08-2001, 11:24 PM	#4
imprezadan Scooby Specialist Member#: 6935 Join Date: May 2001 Vehicle: 1999 Impreza 2.5RS Rally Blue	I haven't even noticed a difference in engine temp when I'm in traffic with the ac on. It certainly won't hurt anything. If it's making the car overheat or something, you have a problem that needs to be checked out!

07-09-2001, 02:03 AM	#6
elemental Scooby Specialist Member#: 2701 Join Date: Oct 2000 Chapter/Region: SCIC Location: occa Vehicle: '00 obs	if it didn't shut off at full throttle though, the top speed should be lower because the AC uses power from the engine (lowers hp, through the whole band) meaning peak hp would be lower --> lower top speed... unless our cars are drag limited, like i've heard, but i find it hard to believe for this reason and others: wrx ver. 3 or 4 or 5 or whatever all had top speed higher than ours and about the same styling, so i don't think you've hit the drag limit yet =) maybe if i put a greddy lip on, but those are cool looking

07-09-2001, 10:52 AM	#7
Spectre23 Scooby Specialist Member#: 311 Join Date: Sep 1999 Chapter/Region: RMIC Location: Murray, Ut, USA Vehicle: 2013 STi CBS	An uh.... friend of mine has gone as high as 138 ish in a '98 RS with A/C on and no heating problems.

07-09-2001, 01:17 PM	#8
Clegg Scooby Specialist Member#: 7761 Join Date: Jun 2001 Chapter/Region: MWSOC Location: Denver, CO Vehicle: 2008 VW R32 #3858 Blue	122Mph with my RS with the A/C on

07-09-2001, 02:03 PM	#9
bratmantlz Scooby Specialist Member#: 3231 Join Date: Dec 2000 Chapter/Region: RMIC Location: colorado springs colorado usa Vehicle: 88 626 Turbo white	no iwas worried high speeds with it on could damgage the compressor. since usually the car is going at city speeds when the ac is on.... Brat