disable auto a/c

dawudih · 06-05-2012, 11:31 PM

Quote:

Originally Posted by '10Anamoly

I'm pretty sure the car has different ECU maps for use when the A/C compressor is on. The power you feel come back during WOT is the car switching maps. The timing, idle speed, etc are very different when the A/C compressor is on. Thus, who knows what power you do or dont lose, but its true that the compressor itself doesnt take up 15 hp.

I don't think it's a different engine map.
It's the A/C clutch disengaging & putting less load on the engine. The compressors clutch is controlled by a pressure switch. It's cycling off & on every few seconds.
The temp control only controlls how much hot air is allowed to mix with the chilled air, it does not control how long the compressor stays on or off.

Waiz · 06-06-2012, 12:44 AM

Quote:

Originally Posted by dawudih

Just leave the fan on & compressor off; when you restart the car, the compressor will not turn on as long as the fan was left on.

Pelican170 · 06-06-2012, 10:03 AM

Ive tried all the tricks in this thread and I cant get it so that the recirculated air is NOT on A/C. Anytime it is set to recirculate, the AC light comes on and i cant find a way to have it just blow recirculated air without the AC being on... the second i push the AC button to turn it off, it switches to fresh air...

KaienZ34 · 06-06-2012, 10:22 AM

Quote:

Originally Posted by cossie1600

You wont see jackshit on the dyno because the AC shuts off when you go wot. 3HP can run a 4 ton compressor.

Quote:

Originally Posted by MattP725

Also keep in mind that the AC will disengage when you hit WOT. Really step on the gas and feel the vents... the air gets almost instantly warmer for a minute.

Otherwise as others suggested take it off auto... I tend to think it is not always engaged because even when heat comes from the vents the AC light never goes off.

Also no way you are losing 25 hp...

On very old cars 1980's and older the AC did not kick off when you went WOT all newer cars do.

cjr1881 · 06-07-2012, 07:46 PM

Quote:

Originally Posted by KaienZ34

On very old cars 1980's and older the AC did not kick off when you went WOT all newer cars do.

It doesn't really matter to me that it disengages at WOT. I don't know about you guys, but I don't just want power when I am going in a straight line. If you feather the gas pedal in a corner, and even if you do go full throttle, it takes time for it to disengage. You guys that don't think it matters are just not race minded and aren't real drivers.

KaienZ34 · 06-07-2012, 08:22 PM

Quote:

Originally Posted by cjr1881

It doesn't really matter to me that it disengages at WOT. I don't know about you guys, but I don't just want power when I am going in a straight line. If you feather the gas pedal in a corner, and even if you do go full throttle, it takes time for it to disengage. You guys that don't think it matters are just not race minded and aren't real drivers.

Please for the love of god pay for a day on a dyno and see what very little hp you loose from your ac and report back. Since you know all in this world and the next about racing and cars in general. If you know so much why would you be asking anyone anything since they are all inferior beings? Do tell us, we all need you to guide us in your ways O'Lord internet racing. Have you ever even been to the track or done any HPDE events??

vjarnot · 06-07-2012, 08:36 PM

I got dibs for first spot in the cjr1881 racing school for real drivers!!!11!OMGWTFBBQ!1

KaienZ34 · 06-07-2012, 08:37 PM

Quote:

Originally Posted by ChrisSlicks

I've used my A/C on track several times to keep the windshield defogged in misty conditions. There was no difference in car feel, acceleration or lap times. An auto A/C compressor isn't quite as efficient as a home unit but the comparison isn't that far off. Power is power as was stated, the difference is in a direct drive compressor you will feel the drag more than the power loss (flywheel effect) and in the low rpm range where the car isn't making much power. At most it pulls 5hp when active and it does seem to disengage under WOT. You'll notice 5hp in a 100hp car, but not so much in a 300hp car.

From a man that has used his z on many track events, lap times don't lie.

cossie1600 · 06-07-2012, 08:39 PM

We aren't, yet we know the difference between 5HP and 25HP.

See you at the track. (Look to the left, my car got up to 120mph in the pouring rain with the AC button on to defrost the windshield. It must be a miracle!)

Huck · 06-07-2012, 10:06 PM

Lol, the argument/importance of issue ratio in here is astronomical.

Sent from my iPhizzle using magic and new fangled science stuff

ShinyBlueZ · 06-07-2012, 10:11 PM

If you're tracking and need power all over the place.. why don't you just turn off the A/C the odd time? Or are you racing for pinks every time you pull out of your driveway?

If you're so race focused.. why do you want the lowly human comforts of A/C period? Just yank that crap out and be gone with it! Will get you some weight reduction as well.

This guy is hardcore.. he drives his 10 second car not in a straight line.. but to push it, and make it through places no one else would take it. He's a real driver!

bdavis89 · 06-07-2012, 10:17 PM

Quote:

Originally Posted by cjr1881

It doesn't really matter to me that it disengages at WOT. I don't know about you guys, but I don't just want power when I am going in a straight line. If you feather the gas pedal in a corner, and even if you do go full throttle, it takes time for it to disengage. You guys that don't think it matters are just not race minded and aren't real drivers.

Sounds like you made a mistake by buying a car with a/c? After all, real race cars don't have a/c..

cossie1600 · 06-07-2012, 10:21 PM

cjr1881 · 06-08-2012, 06:17 AM

Quote:

Originally Posted by KaienZ34

Please for the love of god pay for a day on a dyno and see what very little hp you loose from your ac and report back. Since you know all in this world and the next about racing and cars in general. If you know so much why would you be asking anyone anything since they are all inferior beings? Do tell us, we all need you to guide us in your ways O'Lord internet racing. Have you ever even been to the track or done any HPDE events??

I asked how to disable auto a/c, not whether it bothered you guys or not.

KaienZ34 · 06-08-2012, 09:11 AM

Quote:

Originally Posted by cjr1881

It doesn't really matter to me that it disengages at WOT. I don't know about you guys, but I don't just want power when I am going in a straight line. If you feather the gas pedal in a corner, and even if you do go full throttle, it takes time for it to disengage. You guys that don't think it matters are just not race minded and aren't real drivers.

Quote:

Originally Posted by cjr1881

I asked how to disable auto a/c, not whether it bothered you guys or not.

People told you what they thought would work for the a/c. You felt all those answers were wrong or didn't work, nothing wrong with that. Then you said things like "NOT RACE MINED AND AREN'T REAL DRIVERS." You started the BS so don't cry when people belittle you for it.

06-06-2012, 10:03 AM	#33 (permalink)
Pelican170 Track Member Join Date: Jul 2010 Location: Sandy Hook, CT Posts: 972 Drives: Nissan 370z Nismo Rep Power: 15	Ive tried all the tricks in this thread and I cant get it so that the recirculated air is NOT on A/C. Anytime it is set to recirculate, the AC light comes on and i cant find a way to have it just blow recirculated air without the AC being on... the second i push the AC button to turn it off, it switches to fresh air... __________________ Fast Intentions CF Exhaust - Fast Intentions HFC's - HPS Tubes w/ AFE Dry Flow Filter's

06-07-2012, 08:39 PM	#39 (permalink)
cossie1600 A True Z Fanatic Join Date: Jun 2009 Location: californee way Posts: 5,380 Drives: 370, Leaf Rep Power: 29	We aren't, yet we know the difference between 5HP and 25HP. See you at the track. (Look to the left, my car got up to 120mph in the pouring rain with the AC button on to defrost the windshield. It must be a miracle!) Last edited by cossie1600; 06-07-2012 at 08:44 PM.

06-07-2012, 10:06 PM	#40 (permalink)
Huck A True Z Fanatic Join Date: Jan 2012 Location: Cocoa, Florida Age: 41 Posts: 5,075 Drives: Pantydropper machine Rep Power: 33	Lol, the argument/importance of issue ratio in here is astronomical. Sent from my iPhizzle using magic and new fangled science stuff __________________ VLEDS \| Evo-R \| Moddiction \| CF Hood Struts \| F.I. CF CBE & LTH \| Stillen CAI \| NST Pulleys \| UpRev \| Z1 \| M7 \| Status \| Forgestar \| PSS \| Whiteline \| SPL \| SPC \| Kenwood \| Zenclosure \| Kicker \| Alpine Type R

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06-07-2012, 08:36 PM	#37 (permalink)
vjarnot Base Member Join Date: Apr 2012 Location: Mathews, AL Posts: 68 Drives: 2012 370Z Base SP M6 Rep Power: 13	I got dibs for first spot in the cjr1881 racing school for real drivers!!!11!OMGWTFBBQ!1

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ShinyBlueZ Enthusiast Member Join Date: Apr 2012 Location: In My Z Posts: 462 Drives: Shiniest Bluest Z Rep Power: 13	If you're tracking and need power all over the place.. why don't you just turn off the A/C the odd time? Or are you racing for pinks every time you pull out of your driveway? If you're so race focused.. why do you want the lowly human comforts of A/C period? Just yank that crap out and be gone with it! Will get you some weight reduction as well. This guy is hardcore.. he drives his 10 second car not in a straight line.. but to push it, and make it through places no one else would take it. He's a real driver!

06-07-2012, 10:21 PM	#43 (permalink)
cossie1600 A True Z Fanatic Join Date: Jun 2009 Location: californee way Posts: 5,380 Drives: 370, Leaf Rep Power: 29