Nissan 370Z Forum
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Nissan 370Z Forum (http://www.the370z.com/)
-   DIY Section (Do-It-Yourself) (http://www.the370z.com/diy-section-do-yourself/)
-   -   disable auto a/c (http://www.the370z.com/diy-section-do-yourself/55455-disable-auto-c.html)

dawudih 06-05-2012 11:31 PM
how stuff works
 
Quote:
Originally Posted by '10Anamoly (Post 1750458)
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 (Post 1756144)
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.:ughdance:
:werd:

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 (Post 1748607)
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 (Post 1749359)
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 (Post 1756772)
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 (Post 1759686)
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.
:icon18: :icon18: :icon18: :icon18:

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 (Post 1750435)
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? :icon17:

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! :driving:

bdavis89 06-07-2012 10:17 PM
Quote:
Originally Posted by cjr1881 (Post 1759686)
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
http://images.icanhascheezburger.com...2979267482.jpg

http://cdn3.hark.com/images/000/037/...609/original.0

cjr1881 06-08-2012 06:17 AM
Quote:
Originally Posted by KaienZ34 (Post 1759719)
:icon18: :icon18: :icon18: :icon18:

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 (Post 1759686)
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 (Post 1760378)
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. :tiphat:


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