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Aircond Compressor Draining Too Much Power?

Discussion in 'Proton' started by RENESIS VIII, Aug 12, 2017.

  1. RENESIS VIII

    RENESIS VIII Senior Member
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    I noticed that my Wira 4G15's air cond seems to drain a lot of power from my engine especially during hot afternoon. On night time, early morning or on cooler days even with air cond switched on and compressor kicking in, the power drain seems to be less obvious.

    Like when the compressor is kicking in during hot afternoon time, I notice a reduction in torque where I feel that my revs will climb but the pulling feeling from torque is not there. When I switched the air cond off or when the compressor is not kicking in, I can feel the pulling feeling from torque again. Is this normal that the compressor will draw this much of power especially during hot days?
     
  2. vr2turbo

    vr2turbo Moderator
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    Also during hot time/days the air is hot. Early morning and night the air is cool and more dense. As you know cooler air always better for combustion.....lol
     
  3. RENESIS VIII

    RENESIS VIII Senior Member
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    Yes, I understand this factor. But the underpowered effect is very noticeable during hot afternoon when air cond compressor kicks in while in cooler climate, even if the compressor kicks in, the drain is not so noticeable. Could it be that the air cond compressor is actually working harder during hot afternoon, hence the power drain from engine is larger?
     
  4. sanekit

    sanekit Well-Known Member

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    You need to route ac blower to throttle body. :slug:
     
  5. vr2turbo

    vr2turbo Moderator
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    Work the same, longer time only to get to set temperature since is hotter outside.....
     
  6. vr2turbo

    vr2turbo Moderator
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    Fuh! CAI......hhahahhahha:biggrin:
     
  7. sanekit

    sanekit Well-Known Member

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    on modern cars, you dont feel the power lost when the compressor kicks in. not even a drop in the rpm while idling. but that's on a new car la. hahaha :driver:
     
  8. RENESIS VIII

    RENESIS VIII Senior Member
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    And you get balanced result. Power loss from compressor but compressor supplies cool air to increase back power. :biggrin:

    I also noticed that if I left it idling or just drive at lower RPM, the air doesn't really feel cold and the compressor is kicking in all the time. But when I really rev the engine hard to like 4000 rpm and above, the air gets cold after that. Compressor also will not kick in all the time. Is it because the compressor gets more power from higher RPM?

    Hmmm, why? :confused:
     
  9. vr2turbo

    vr2turbo Moderator
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    Compressor mah! The more rpm means more air con gas is circulated hence the air con is cooler.......lol
     
  10. vr2turbo

    vr2turbo Moderator
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    You try driving with and without the air con on, sure to have difference in power......lol
     
  11. sweelt

    sweelt Well-Known Member

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    bro renesis, aircond condenser fan OK ? check gas pressure too.
     
  12. sweelt

    sweelt Well-Known Member

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    this one i full agree. :biggrin:
    for an old engine in exchange for power, is ok lah. Hahahaha....:driver:
     
  13. sanekit

    sanekit Well-Known Member

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    surprisingly on the jazz got no difference. like the ac compressor doesnt exist. LOL. oh, the new 2016 jazz no water temp gauge on the meter. just outside temperature only. dunno can set that to water temp or not. :hmmmm:
     
  14. sweelt

    sweelt Well-Known Member

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    yup, feel notin.
    Felt something missing, like the engine vibrate the car ehh ? hahaha...:listen:
     
  15. vr2turbo

    vr2turbo Moderator
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    Many new makes do not have the water temp meter dy. blue then warm up disappear, by the time red color appears may be too late.....lol
     
  16. RENESIS VIII

    RENESIS VIII Senior Member
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    This makes it sound like the compressor in a turbocharger. :biggrin:

    Fan is okay. Blowing. Gas pressure din't check.

    If thermostat jammed like my previous case, then really hard to detect until it is too late.
     
  17. vr2turbo

    vr2turbo Moderator
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    Unlike home air con, compressor speed and fan speed in constant. In Car air con, the engine speed determine the compressor speed as well as traveling at a faster speed the condenser fan is aided by wind passing through the condenser, therefore with faster engine speed the air con is cooler....:driver:
     
  18. alcyon

    alcyon Active Member

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    Normal lah.
     
  19. RENESIS VIII

    RENESIS VIII Senior Member
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    Looks like this encourages me to rev the engine harder during hot afternoon. :rofl:

    Is weird that the revs still seems to climb up nicely but I just can't feel the pulling feeling from torque. Like torque is robbed off.
     
  20. sanekit

    sanekit Well-Known Member

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    oh. i thought the blue led ring on the speedo is for eco or something. hahaha. coz it changes from green when drive slow to blue when drive normal. so far no red color. :hmmmm:
     

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