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 1.5: Engine power drain when AC used

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HITESH
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PostSubject: 1.5: Engine power drain when AC used   Mon May 05, 2008 10:16 pm

hi all loganions....

How u all?
Hey yaar i faced a problem today. actually today wen i was back frm market. i switched on the AC, and shockingly Shocked i felt as if my cars weight have increased and acceleration felt very heavy. switched off it and the car was very smooth and racy again.

again checked wid ac again d same problem is the engine with lil ageing will show such kinda problem

i even complained once to mahindra ppl. they say that AC directly puts pressure on engine, but i dnt think this much pressure shud be there ki u r devoid of d enjoyment of driving d car

wat to do Question


Last edited by vsuprak on Tue May 10, 2011 1:54 pm; edited 1 time in total (Reason for editing : Appropriate writing language)
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PostSubject: Re: 1.5: Engine power drain when AC used   Mon May 05, 2008 11:05 pm

There will obviously be some presure but not so much!! There is a drag which any car will have but if it is too much, go ahead and get it investigated!!

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HITESH
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PostSubject: Re: 1.5: Engine power drain when AC used   Tue May 06, 2008 12:09 pm

yea i agree that there is some kinda drag. but i feel ki i shud switch off d AC EVEN IN HOT DAZZY CONDITIONS JUST FOR SHEER PLEASURE OF DRIVE

With AC, its not working like that. maybe have to give anoder visit to mahindra ppl


Last edited by vsuprak on Tue May 10, 2011 1:57 pm; edited 1 time in total (Reason for editing : Appropriate writing language)
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PostSubject: Re: 1.5: Engine power drain when AC used   Fri May 09, 2008 2:05 pm

get ur car checked up their is definitely some issue , and report the findings
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PostSubject: Re: 1.5: Engine power drain when AC used   Fri May 06, 2011 12:39 pm

Power drop in Max AC position
In my car also I feel there is a huge pulling power drop when AC is set to max and blower is set to max. This was with me alone in the car and no load in boot. But it feels as if I have 5 people in car with full load in trunk.

This does not occur when AC is set to first position(i.e smallest blue dot 1)

Power drop in Min AC position - Only for first 10 secs - When car is running
But even in setting 1, I notice a huge pulling power drop for some initial 10 seconds when AC is switched on for the first time when the car is running.



If some one is willing, try to set AC and blower to max position and please report your findings.
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PostSubject: Re: 1.5: Engine power drain when AC used   Tue May 10, 2011 12:22 am

I don't think the maximum and minimum position has anything to with the power. If my understanding is correct when it is in maximum position you get cool air only and when it is at minimum a bit of warm air is introduced to bring down the cooling effect. The a/c works at the same output.
I have covered close to 70000Kms haven't noticed any drop in power when the a/c is engaged.
Touchwood Smile
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PostSubject: Re: 1.5: Engine power drain when AC used   Tue May 10, 2011 1:06 pm

I guess you are correct Rajesh. But why did I feel a huge power drop?..I am thinking..
Will setting blower to high speed will cause such a power drop?..
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PostSubject: Re: 1.5: Engine power drain when AC used   Tue May 10, 2011 2:01 pm

@MCL,

Higher setting will only increase the blower speed. That is the Rate of flow of cold Air.
If you are cooling the cabin faster then the compressor will kick in for cooling much frequently than in normal case.

It mainly depends on the temperature setting you have kept it at (Primary)
and then the blower speed for the rate of cooling at set temperature (Secondary)
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PostSubject: Re: 1.5: Engine power drain when AC used   Tue May 10, 2011 5:03 pm

ok..tried a bit of googling and here is the result.

http://www.indiacar.com/infobank/car_ac_part2.htm
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PostSubject: Re: 1.5: Engine power drain when AC used   Tue May 10, 2011 5:19 pm

Nice article MCL.
I like the last bit

Source wrote:

Q2) I know of people who put the A/C off and on at intermittent intervals to save on fuel when the car is running/at signals. Is this a good practice?

A2) It's out of ignorance. The more you manually sw on/off the Comp - the more you're cutting into its Clutch life. Above all, why sweat at the traffic lights. AC is meant to keep you cool and not sweat. If you choose to have it, use it ! If it has to cut-off per System needs, it'd do on its own!!
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karan
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PostSubject: Re: 1.5: Engine power drain when AC used   Wed May 11, 2011 7:29 pm

how does ac use reduce clutch life?
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