a/c and rpm

Thread Tools
 
Search this Thread
 
Old 07-26-2005, 06:56 AM
  #1  
New Member
Thread Starter
 
groovep's Avatar
 
Join Date: Apr 2005
Posts: 12
Likes: 0
Received 0 Likes on 0 Posts
Default a/c and rpm

How much should inrease rpm when a/c is on?
Is it noticeable and can be seen in the instrument cluster?
Mine rpm are almost the same with ac on or off:/
Maybe there is a way to check smth, that everything is ok or not?
Old 07-26-2005, 07:30 AM
  #2  
New Member
 
juzzo's Avatar
 
Join Date: Feb 2005
Posts: 21
Likes: 0
Received 0 Likes on 0 Posts
Default Re: a/c and rpm

in my car the difference is approx. 500 rpm. It si seemingly ok.
Old 07-26-2005, 07:35 AM
  #3  
New Member
Thread Starter
 
groovep's Avatar
 
Join Date: Apr 2005
Posts: 12
Likes: 0
Received 0 Likes on 0 Posts
Default Re: a/c and rpm

are u sure 500rpm?
maybe 50?
Old 07-26-2005, 10:37 AM
  #4  
JWG
Member
 
JWG's Avatar
 
Join Date: Sep 2001
Posts: 2,302
Likes: 0
Received 0 Likes on 0 Posts
Default

Approximately 200-300 rpm at idle on my ECU--MMS411
Old 07-26-2005, 11:11 AM
  #5  
AudiWorld Super User
 
Jretal's Avatar
 
Join Date: Jun 2001
Posts: 15,636
Likes: 0
Received 0 Likes on 0 Posts
Default mine flickers but goes up maybe 2-300 MAX like JWG said...

barely noticable though... also depends on how hot it is out... like today with heat index at 115 here... it's def gonna be cycling a lil bit
Old 07-26-2005, 11:25 AM
  #6  
New Member
Thread Starter
 
groovep's Avatar
 
Join Date: Apr 2005
Posts: 12
Likes: 0
Received 0 Likes on 0 Posts
Default Re: mine flickers but goes up maybe 2-300 MAX like JWG said...

hm, mine rpm are not changing when a/c is on or changes a very little.
It is interesting, that when the engine reaches ~100 degrees (celcius) with a/c on, the performance decreases significantly and i can hear the compresor humming (crying) when i rev up to 3krpm.
Im lost
Old 07-26-2005, 02:27 PM
  #7  
AudiWorld Super User
 
MM120's Avatar
 
Join Date: Oct 2001
Posts: 4,449
Likes: 0
Received 0 Likes on 0 Posts
Default Mine is also about 500 rpm diff. when engine is just started, but

once it warms up to normal operating temp it is more like 200-300 rpm diff.
Old 07-27-2005, 01:35 AM
  #8  
AudiWorld Super User
 
moribundman's Avatar
 
Join Date: Jan 2003
Posts: 9,298
Likes: 0
Received 0 Likes on 0 Posts
Default 640-680 without A/C, 100 RPM more with A/C on

But my A/C is defective. :-(
Old 07-27-2005, 02:02 AM
  #9  
New Member
 
juzzo's Avatar
 
Join Date: Feb 2005
Posts: 21
Likes: 0
Received 0 Likes on 0 Posts
Default

Re: OOPS. I meant approx 50-100, when engine warm! sorry
Old 07-28-2005, 10:34 AM
  #10  
AudiWorld Super User
 
Jretal's Avatar
 
Join Date: Jun 2001
Posts: 15,636
Likes: 0
Received 0 Likes on 0 Posts
Default it's calling your name Tom... can you hear it?

fix meeee... =P
<img src="http://pictureposter.audiworld.com/21175/dscf0148.jpg">

<img src="http://pictureposter.audiworld.com/21175/dscf0156.jpg">

sorry... couldn't help myself


Quick Reply: a/c and rpm



All times are GMT -8. The time now is 12:45 PM.