Under what conditions does the A/C get turned off?
Thread Starter
TECH Enthusiast
iTrader: (1)
Joined: Nov 2004
Posts: 698
Likes: 0
From: Ontario, Canada
Under what conditions does the A/C get turned off? I know the A/C shuts off under high throttle, can someone tell me all the conditions where this will occur, does the A/C get shut off due to RPM limitations as well?
Thread Starter
TECH Enthusiast
iTrader: (1)
Joined: Nov 2004
Posts: 698
Likes: 0
From: Ontario, Canada
I had looked up the spec for similar Delphi compressor and its rated RPM was 6500 and with the pulley ratios that engine RPM makes sense.
The TPS settings seem impossible, on these cars can the throttle actually get to 100%? If I stomped the pedal on the floor at low RPM the A/C would never come on again, or would being below the RPM limit reactivate it?
The TPS settings seem impossible, on these cars can the throttle actually get to 100%? If I stomped the pedal on the floor at low RPM the A/C would never come on again, or would being below the RPM limit reactivate it?
You really do not want the A/C enabled while at 100% TPS, yes these cars will reach 100% when you mash the throttle. The reason the A/C disengages is not only to save the compressor, but to limit the un-necessary stress on the engine. Once the TPS% reaches the level you selected, like mine is set to:
A/C enable RPM: 3000
A/C disable RPM: 4000
A/C enable TPS%: 20%
A/C disable TPS%: 70%
Then the ECM re-engages the A/C clutch. The image posted is not the normal settings, those have been modified. The reason I have these settings on my truck is because I tow with it. My SS has similar values to allow the engine to put more power to the ground without being dragged down by the A/C compressor.
A/C enable RPM: 3000
A/C disable RPM: 4000
A/C enable TPS%: 20%
A/C disable TPS%: 70%
Then the ECM re-engages the A/C clutch. The image posted is not the normal settings, those have been modified. The reason I have these settings on my truck is because I tow with it. My SS has similar values to allow the engine to put more power to the ground without being dragged down by the A/C compressor.
Originally Posted by Flame Throwing SS
The image posted is not the normal settings, those have been modified.
I don't like the 100%/0% settings even though my
car will hit both. That means (like on a highway trip)
if you pass somebody once you won't have A/C again
unless you drop out of cruise and release the pedal. I
set mine to 4000/3800 for RPM and 70%/50% TPS
(Edit>System>A/C for HPTuners users).
car will hit both. That means (like on a highway trip)
if you pass somebody once you won't have A/C again
unless you drop out of cruise and release the pedal. I
set mine to 4000/3800 for RPM and 70%/50% TPS
(Edit>System>A/C for HPTuners users).
Trending Topics
Originally Posted by 2xLS1
The image posted is straight from a stock 02 M6 F-body file.
LS1 Tech Stories
The Best V8 Stories One Small Block at Time
Gas Monkey Built a 6-Wheel Ferrari Testarossa With a Corvette LT4 Engine
Verdad Gallardo
7 Most Reliable High-Performance Engines GM Has Ever Built
Verdad Gallardo
Amazing '71 Camaro Restomod Is Modern Muscle Car Under the Skin
Verdad Gallardo
6 Common C5 Corvette Failures and What's Involved In Repairing Them
Pouria Savadkouei
Retro Modern Bandit Pontiac Trans AM Comes With Burt Reynolds' Autograph
Verdad Gallardo
Top 10 Greatest Cadillac V Series Performance Models Ever, Ranked
Pouria Savadkouei
Top 10 Most Powerful Chevy Trucks Ever Made!
Hennessey's New Supercharged Silverado ZR2 Has 700 HP
Verdad Gallardo
Coachbuilt N2A Anteros Is an LS2-Powered C6 Corvette In Italian Clothes
Verdad Gallardo I tune so I have more stock files than I care to count. All 99-02 A4 and M6 F-body files are set like the pic I posted from the factory. 98s M6s are set RE/D - 3650/4000 - 81%/86% and 98 A4s are RE/D - 3950/4294 - 100%/100%. Vettes are even different from those. The settings I posted were used on such a wide span of years and tranny types is why I chose to post those and why I called them typical.
Not on our 1998 Z28, 2001 SS, 1999 Sierra and 2002 Silverado ... all factory bin files. As well as other factory auto bin files I have. I would just say this, GM set them differently on similar cars.
On all the cars I tune that have the 100%, 0% setting I change to 70% 20% just like above.
Another not shown table is low pressure cutoff, if you hear the a/c compressor cycling very frequently its probably due to a low pressure situation shutting it off.
Another not shown table is low pressure cutoff, if you hear the a/c compressor cycling very frequently its probably due to a low pressure situation shutting it off.